MILLENNIUM SYSTEM DIGITAL TRUNK APPLICATIONS

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					eOn Communications Practices                                                                                                                 SECTION 32-112-153
                                                                                                                                           Issue 9, February 2009


                                                           MILLENNIUM SYSTEM
                                                      DIGITAL TRUNK APPLICATIONS

CONTENTS                                                                      PAGE          CONTENTS                                                                    PAGE

1. INTRODUCTION ................................................................. 1                 A.       SYSTEM CONFIGURATION ................................ 16
     RELATED DOCUMENTS ................................................. 2                          B.       CABLE CONSTRUCTION .................................... 16
2. DESCRIPTION .................................................................... 2       9. UNPACKING AND INSPECTING ...................................... 16
    T1 DIGITAL TRUNK CARD .............................................. 2
    E1 DIGITAL TRUNK CARD .............................................. 2                  10. INSTALLATION PROCEDURES ....................................... 18
    SYSTEM CLOCK III ......................................................... 3                  A.  SYSTEM CLOCK III CARD .................................. 18
                                                                                                  B.  DIGITAL TRUNK CARD (T1 or E1) ...................... 18
3. T1 TUTORIAL ...................................................................... 3           C.  CONNECTING CABLES ...................................... 21
     DIGITAL CHANNELS ...................................................... 3
     VOICE SAMPLING ........................................................... 3           11. GLOSSARY ....................................................................... 22
     FRAMING ......................................................................... 4
     A.   D4 Framing Format ................................................ 4              Appendix 1 ............ Compatibility Matrix for Protocol Variants
     B.   Extended SuperFrame Format ............................... 4
     LINE CODE ...................................................................... 6
     CODE SUBSTITUTION .................................................... 6
     A.   Zero Code Suppression (ZCS) ............................... 6
     B.   Bipolar With 8 Zero Substitution (B8ZS) ................ 8
4. E1 TUTORIAL ...................................................................... 8     1.      INTRODUCTION
     DIGITAL CHANNELS ....................................................... 8             1.1          This section includes information that:
     VOICE SAMPLING ........................................................... 8
     FRAMING ......................................................................... 9          (a) Describes the Digital Trunk/ISDN PRI Line
    A.    Double Frame Format ............................................ 9                      Card and the System Clock III Card.
    B.    CRC Multiframe Format ....................................... 11
                                                                                                  (b) Relates the application to T1/E1 trunking.
     LINE CODE .................................................................... 11
                                                                                                  (c) Provides a brief tutorial and glossary of terms.
5. ALARMS ............................................................................ 11
                                                                                                  (d) Describes signaling protocols supported for
6. NETWORKING .................................................................. 11
                                                                                                  international standards.
    CLOCK SOURCE ........................................................... 11
    CONFIGURATIONS ....................................................... 11                     (e) Gives procedures for installing the Digital
                                                                                                  Trunk Card and the System Clock III Card and
7. SIGNALING ....................................................................... 12
                                                                                                  for constructing and installing cabling.
     GENERAL ...................................................................... 12
     ISDN PRIMARY RATE ................................................... 12                     (f) Offers programming suggestions for system
     A.   DMS-100 .............................................................. 13               operation in a T1/E1 environment.
     B.   4ESS .................................................................... 13
     C.   DMS-250 .............................................................. 13         1.2      This section is reissued to include feature
     D.   National ISDN ....................................................... 13          enhancements available with Millennium software
     E.   NET5 (Euro-ISDN) ................................................ 13              version 3.12. Also, this section is reissued to remove
     F.   VN4 ....................................................................... 13    references to products that have been manufac-
     G.   Q.SIG ................................................................... 13      tured discontinued (MD) for longer than one year.
     H.   AUSTRALIA .......................................................... 14           These items are covered in Issue 8 of the Technical
     INTERNATIONAL (BIT ORIENTED) .............................. 14                         Manual which is available online at http://
     A.   TAIWAN ................................................................ 14        partner.eoncc.com/login/login. For a complete list-
     B.   RUSSIA ................................................................ 14        ing of items that have been removed from this
     C.   Q.421 R2 SIGNALING LOCATIONS .................... 15                              issue, please refer to Appendix 3 in Section 32-112-
                                                                                            100. Whenever this section is reissued, the reason
8. INSTALLATION PLANNING ............................................. 15                   for reissue will be given in this paragraph.


                                                                                                                                                                       Page 1
SECTION 32-112-153, ISS 9


RELATED DOCUMENTS                                       tion for sneak circuit and overvoltage, using in-line
                                                        fuses and 3-electrode gas tubes for the receive and
1.3    For additional information regarding the         transmit pair.
Millennium System, refer to the list of related docu-
ments in Volume 1, Section 32-112-100, System           2.8     One or more T1 Digital Trunk Cards can be
Description.                                            equipped in a system. The cards can be installed in
                                                        any available odd-numbered card slot in the equip-
2.   DESCRIPTION                                        ment cabinet. A maximum of four T1 Digital Trunk
                                                        Cards can be installed in an 8-slot cabinet. A maxi-
2.1     Millennium digital trunks support bit ori-      mum of eight cards can be installed in a 16-slot
ented and ISDN Primary Rate (PRI) signaling pro-        cabinet.
tocols as well as level attenuation and tone detec-
tion.                                                   E1 DIGITAL TRUNK CARD
2.2    PRI trunks are supported on both T1 and          2.9    The E1 Digital Trunk Card provides 2.048
E1 cards.                                               Mbps digital interface capability with a 32-channel
2.3     T1 digital line cards can contain a mixture     E1 trunk span. It provides digital transmission be-
of ISDN and non-ISDN (robbed-bit signaling) appli-      tween the Millennium and distant office interfaces.
cations. For example, INWATS and OUTWATS                The far-end termination may be a digital channel
trunks could be programmed for ISDN PRI signal-         bank or another Millennium Digital Trunk Card.
ing, while tie trunks on the same span line could       2.10     The card works under control of an 80C188,
use E&M signaling.                                      8-bit microprocessor. The bootstrap software that
                                                        initializes the microprocessor at power-up resides
T1 DIGITAL TRUNK CARD                                   in ROM located on the card. Operating software
2.4    The T1 Digital Trunk Card provides 1.544         unique to the E1 Digital Trunk Card is available on
Mbps digital interface capability with a 24-channel     the system PCM common bus link. It is transferred
T1 trunk span. It provides digital transmission be-     to the E1 Digital Trunk Card and stored in on-
tween the Millennium and distant office interfaces.     board RAM.
The far-end termination may be a digital channel        2.11    The front-edge panel on the E1 Digital Trunk
bank or another Millennium Digital Trunk Card.          Card contains four LED indicators. The LEDs indi-
2.5      The card works under control of an 80C188,     cate operating conditions: microprocessor running,
8-bit microprocessor. The bootstrap software that       circuit busy, presence of an E1 yellow alarm, pres-
initializes the microprocessor at power-up resides      ence of an E1 red alarm, and occurrences of line
in ROM located on the card. Operating software          errors.
unique to the T1 Digital Trunk Card is available on     2.12   The E1 Digital Trunk Card is available in
the system PCM common bus link. It is transferred       two variants: a 15-pin DB-type male connector with
to the T1 Digital Trunk Card and stored in on-board     a 120-ohm interface; two BNC-type connectors and
RAM.                                                    a 75-ohm interface.
2.6     The front-edge panel on the T1 Digital Trunk    2.13     As one option, the E1 Digital Trunk Card
Card contains four LED indicators and a 15-pin DB-      connects to the CSU via a cable containing two
type male connector. The LEDs indicate operating        shielded, twisted-pair E1 cables. The cable must be
conditions: microprocessor running, circuit busy,       constructed with one end terminated in a female
presence of a T1 yellow alarm, presence of a T1 red     DB15 connector for compatibility with the E1 Digi-
alarm, and occurrences of line errors.                  tal Trunk Card front panel connector. The opposite
2.7     The T1 Digital Trunk Card connects to the       end must be terminated for compatibility with the
Channel Service Unit (CSU) via a cable containing       CSU. The Digital Trunk Card provides line protec-
two shielded, twisted-pair T1 cables. The cable must    tion for sneak circuit and overvoltage, using in-line
be constructed with one end terminated in a female      fuses and 3-electrode gas tubes for the receive and
DB15 connector for compatibility with the T1 Digi-      transmit pair.
tal Trunk Card front panel connector. The opposite      2.14   One or more E1 Digital Trunk Cards can be
end must be terminated for compatibility with the       equipped in a system. The cards can be installed in
CSU. The Digital Trunk Card provides line protec-       any available, odd-numbered card slot in the equip-


Page 2
                                                                                 ISS 9, SECTION 32-112-153



ment cabinet. A maximum of four E1 Digital Trunk        channels are demultiplexed into 24 separate chan-
Cards can be installed in an 8-slot cabinet. A maxi-    nels.
mum of eight cards can be installed in a 16-slot
cabinet.                                                3.4     Each of these channels can be used for voice
                                                        or data transmission.
SYSTEM CLOCK III                                        3.5     In certain applications such as bit-oriented
                                                        clear-channel and ISDN PRI, a channel is dedicated
2.15    The System Clock III, provides synchroni-       to signaling.
zation of system timing to one or more external T1
and/or E1 sources. The System Clock III replaces
the previous T1 and E1 Clock Cards, supporting all      VOICE SAMPLING
their existing capabilities, in addition to providing   3.6     Analog voice is encoded into a digital
timing signals for the 2-Wire Digital Station Card.     bitstream by means of a pulse code modulation
2.16    The System Clock III supports both T1s and      (PCM) coder/decoder (CODEC). In the coding pro-
E1s, even when both card types are installed in the     cess, samples of the analog voice input are taken at
same system. It automatically detects the valid         1/8000-second intervals. Each sample is converted
clock source but also allows the installer to define    into an 8-bit (1 data byte) code word representing
the clock source. (For a discussion of clock sources,   the voltage of the analog voice input at the precise
see Part 6, Networking.)                                time of sampling and producing a digital bitstream
                                                        of 64 Kbps (8 bits x 8000 samples/second). The
2.17    System Clock III is compatible with both        duration of one sample (5.18 microseconds) is called
the Common Services I and Common Services II            a timeslot. Figure 1 shows the contents of a typical
cards; however, modifications to the Common Ser-        timeslot.
vices I card are required. Also, Common Services I
Card is manufactured discontinued. Configuration        3.7     PCM encoding and decoding are done per
2 and later revisions of the Common Services II         ITU-T (CCITT) recommendation G.711. In Millen-
Card supports the System Clock III.                     nium software versions before 1.09, either A-law or
                                                        μ-law (typical with T1) encoding and decoding are
       Note: System Clock III requires software         selected on a system-wide basis. Software version
       version 1.08-006 or later.
                                                                          TABL E A
3.   T1 TUTORIAL
                                                              T1 SIGNAL COMMON CHARACTERISTICS
3.1     T1 is the two-way transmission of digital
signals at 1,544,000 bits per second (1.544 Mbps). It       CHARACTERISTICS SPECIFICATIONS
is a communications carrier system that concen-             Bit Rate             1.544 Mbps +/-50 ppm
trates 24 digital channels onto two pairs of wires—a
transmit pair and a receive pair.                           Line Code            AMI ZCS or B8ZS

                                                            Line Impedance       100 ohms resistive
DIGITAL CHANNELS
                                                            Pulse Amplitude      2.4 - 3.6 Volts peak
3.2     A single digital channel requires 64,000 bits
per second (64 Kbps). This is DS-0 or data signal           Pulse Shape          Rectangular
level zero. The T1 bandwidth of 1.544 Mbps accom-           Pulse Imbalance      Less than 0.5 dB difference
modates 24 digital channels (64 Kbps x 24 = 1.536                                between the total power of the
Mbps) plus 8,000 bits per second (8 Kbps) for con-                               positive and the negative pulses
trol and error reporting. This is DS-1 or data signal
                                                            Signal Statistics    Minimum average pulse density
level one at 1.544 Mbps. Table A lists the common                                of 3 in 24 and no more than 15
characteristics of DS-1 signals at 1.544 Mbps.                                   consecutive zeros
3.3     The T1 equipment encodes the 24 digital             Frame Length         193 bits
channels into digital format for transmission. At
                                                            Frame Rate           8 KHz
the transmitting end, the 24 channels are time-
division multiplexed into a single stream of infor-         Frame Organization   24 eight-bit timeslots plus 1
mation (bitstream). At the receiving end, the 24                                 framing bit per frame
                                                                                                           awc6-182



                                                                                                             Page 3
SECTION 32-112-153, ISS 9


1.09, however, supports A-law/μ-law conversion for               ing information is carried in the same bitstream
T1 and E1 line cards:                                            with the user information. It is transmitted by a
                                                                 process called robbed-bit signaling. In the sixth
     (a) Programming for A-law or μ-law in GS OP-                and twelfth frames of each superframe, the user
     TIONS affects all cards except T1 and E1 cards.             information in the least significant bit (eighth bit)
     (b) Line card programming for T1 and E1 cards               of each timeslot is overwritten with the signaling
     specifies A-law or μ-law.                                   information. This process provides two signaling
                                                                 bits per superframe. The receiving equipment in-
     (c) Signal conversion occurs when the specified             terprets these signaling bits separately.
     encoding system for the T1 or E1 differs from the
     system-wide coding in GS OPTIONS.                           3.12    The robbed bits in the sixth frame are des-
                                                                 ignated signaling channel A; the robbed bits in the
3.8    The digital signal processor (DSP) on the T1              twelfth frame are designated signaling channel B.
card converts the PCM value using values found in                Four signaling conditions can be transmitted with
a lookup table. When conversion is required, the                 the two possible states of each of the two bits.
number of attenuations performed by the card is                  Transitions between these two supervisory states
reduced to four. If the same encoding is specified by            can indicate or control disconnect, busy, dial pulses,
GS OPTIONS and all line card programming, the                    and supervisory signals. Table B shows the f-bit
number of attenuations remains at eight.                         and signaling channel assignments for the D4 for-
                                                                 mat.
FRAMING
                                                                 3.13    If ISDN PRI (common channel signaling)
3.9     Framing is the organization of the 1.544                 carries address and supervisory signaling, the ISDN
Mbps bitstream into a format that can be under-                  message-oriented signaling is carried in the 24th
stood by the receiving end. There are two framing                timeslot (D-channel), which cannot be used for user
formats: D4 and Extended SuperFrame (ESF). Ei-                   information transfer.
ther framing format may use robbed-bit, bit-ori-
ented, or ISDN PRI signaling. ESF can additionally               B.    Extended SuperFrame Format
use clear channel bit-oriented signaling.
                                                                 3.14    In the Extended SuperFrame (ESF) for-
A.       D4 Framing Format                                       mat, one frame consists of one 8-bit timeslot from
                                                                 each of the 24 channels, with a framing bit (f-bit) to
3.10    In the D4 framing format (Figure 2), one                 mark the beginning of each frame. The superframe
frame consists of one 8-bit timeslot from each of the            is extended to 24 consecutive frames (Figure 3).
24 channels (one PCM sample for channels used for                Address and supervisory signaling may be carried
voice), with a framing bit (f-bit) to mark the begin-            in-band or by bit-oriented clear-channel or ISDN
ning of each frame. Twelve frames constitute a                   PRI signaling.
superframe. The 12 framing bits included are di-
                                                                 3.15    The 24 framing bits are divided into three
vided into two groups: Terminal Framing bits with
                                                                 groups: Framing Pattern Sequence (FPS) with a
a pattern to mark the beginning of each frame
                                                                 pattern to synchronize the mainframe, the
(101010), and Signaling Framing bits with a pat-
                                                                 superframe, and the address and supervisory sig-
tern to mark the beginning of each superframe
                                                                 naling bits; Facility Data Link (FDL) with a pat-
(001110).
                                                                 tern to carry performance information and control
3.11    If address and supervisory signaling is car-             signals; and Cyclic Redundancy Check (CRC-6) for
ried in-band in the D4 framing format, the signal-               error checking.
                                                                 3.16    The FPS uses the framing bit of every fourth
                                                                 frame in each superframe, beginning with the fourth
                                                                 frame, and forms the pattern 001011. Mainframe
                               5.18 μsec                         synchronization locates the 24 DS-0 channels of
     1      0        1     1         0             1
                                                                 each frame. Superframe synchronization identifies
                                           1   0
                                                                 the location of each frame within the superframe to
                                                                 allow extraction of diagnostic information, and to
                                                       awc0-97
                                                                 identify the frames that contain address and su-
                Figure 1: Typical PCM Time Slot                  pervisory signaling.


Page 4
                                                                                                                                          ISS 9, SECTION 32-112-153




                                                                                 125 μsec



                                      5.18 μsec

                                                                                            Timeslot = 1 PCM sample from one voice channel




            Frame = 24, 8-bit Time slots + 1 framing bit = 193 bits

1      2         3      4       5      6     7         8     9        10        11   12       13    14     15   16   17     18       19   20   21   22    23        24


    Framing Bit




           Superframe = 12 frames, each separated by a framing bit

1      2         3     4        5     6      7         8     9        10        11   12


                                      1.5 msec                                                                                                           awc0-100




                                                                           Figure 2: D4 Framing Format




                                                                                             TABLE B
                             D4 FRAMING FORMAT F-BIT AND CHANNEL SIGNALING ASSIGNMENTS

                              SF                           F-BITS
                                                              INFORMATION                                            LOCATION OF               SIGNALING
                            FRAME
                                           TERMINAL SIGNALING CODING BITS                                            SIGNALING BIT             CHANNELS
                             NO.
                                           FRAMING FRAMING
                                1                  1                        -                        1-8                         -                   -
                                2                  -                        0                        1-8                         -                   -
                                3                  0                        -                        1-8                         -                   -
                                4                  -                        0                        1-8                         -                   -
                                5                  1                        -                        1-8                         -                   -
                                6                  -                        1                        1-7                         8                   A
                                7                  0                        -                        1-8                         -                   -
                                8                  -                        1                        1-8                         -                   -
                                9                  1                        -                        1-8                         -                   -
                               10                  -                        1                        1-8                         -                   -
                               11                  0                        -                        1-8                         -                   -
                               12                  -                        0                        1-7                         8                   B

                            Notes: 1. The above sequence is repetitive.                                                                                  awc0-94
                                   2. Frames 6 and 12 are denoted as signaling frames.



                                                                                                                                                                         Page 5
SECTION 32-112-153, ISS 9


3.17   Only 2 Kbps of the 8 Kbps are used for                     Note: The Millennium Digital Trunk Card
framing synchronization. Of the remaining 6 Kbps,                 interface supports both pulse and DTMF
4 Kbps are used for FDL, and 2 Kbps are used for                  address signaling with robbed-bit and bit-
CRC-6. The CRC-6 is used to monitor the perfor-                   oriented clear channel transmission. Address
mance of the T1 system end-to-end. In the Millen-                 signaling is carried in D-channel messages
nium, the FDL normally transmits all ones, except                 when ISDN PRI signaling is used.
when a yellow alarm signal is being transmitted.
3.18    Address and supervisory signaling may be          LINE CODE
transmitted by robbed-bit signaling or by bit-ori-
                                                          3.23    The 8-bit digital bitstream is converted to a
ented clear-channel or ISDN PRI signaling. In the
                                                          bipolar format by a process called Alternate Mark
sixth, twelfth, eighteenth, and twenty-fourth frames
                                                          Inversion (AMI). Every second voltage pulse (mark),
of each superframe, the voice information in the
                                                          representing a digital one, is inverted. This conver-
least significant bit (eighth bit) of each timeslot is
                                                          sion produces an 8-bit digital bitstream in which
overwritten with the signaling information. This
                                                          voltage pulses alternate positive and negative, and
process provides four signaling bits per timeslot in
each superframe. The receiving equipment inter-           a digital zero is represented by a zero voltage level
prets these signaling bits separately.                    (Figure 4). A bipolar violation (BPV) in the bitstream
                                                          occurs when two successive one pulses are of the
3.19    The four signaling channels are designated        same polarity (Figure 5). This error in the transmit-
A, B, C, and D. The TIA464 signaling standard             ted data causes an alarm indication.
employed in North America uses only 2 signaling
channels. The most common practice is to repeat           CODE SUBSTITUTION
signaling bits: the information in signaling channel
A is repeated in signaling channel C, and the infor-      3.24    Code substitution provides keep-awake
mation in signaling channel B is repeated in signal-      pulses to maintain clock synchronization when long
ing channel D. Table C shows the f-bit and signal-        strings of zeros are transmitted. The clocks in the
ing channel assignments in the ESF format.                regenerators and in the receiving-end equipment
                                                          must be synchronized with the clock in the trans-
3.20    Clear-channel capability is an application of     mitting end. The clock recovery circuits depend on
the ESF format that allows all 64 Kbps in the             the voltage pulses (digital ones) for synchronization
channel to be used for information transfer. In clear     and lose accuracy when few ones are transmitted.
channel transmission, signaling is carried out-of-
band, providing a 64 Kbps voice channel in which          3.25     To ensure clock synchronization, a line code
every bit is significant.                                 restriction is imposed that specifies at least 3 one
                                                          pulses in 24 bits (1/8 average ones density) and no
3.21     Robbed-bit signaling is not a significant fac-   more than 15 consecutive zeros in 24 bits. When-
tor in voice channel distortion. In fact, to avoid        ever a string of eight consecutive zeros is transmit-
dealing with the signaling bit (the least significant     ted, bit substitution is used to insert false one pulses
bit of each timeslot in every sixth frame), the com-      to provide keep-awake pulses for the regenerator
mon practice is to avoid using the eighth bit alto-       and receiving-end clocks. The Millennium offers
gether so that in a 64 Kbps voice channel, one bit in     two alternatives for code substitution: AMI ZCS
eight is discarded, resulting in a 56 Kbps voice          and Bipolar with 8 Zero Substitution.
channel.
3.22    In digital data channels, including the ISDN      A.    Zero Code Suppression (ZCS)
D channel, however, each bit is significant, so robbed-   3.26    One method of providing keep-awake pulses
bit signaling and the constraints imposed by the          is Zero Code Suppression (ZCS). In D4 and ESF
average ones density and maximum consecutive              framing, ZCS replaces the contents of any timeslot
zeros rules are unacceptable. Because all 64 Kbps         that contains all zeros with the code 00000001. The
are used for data in clear-channel transmission,          distortion introduced in a voice transmission by
both bit-oriented and ISDN PRI signaling must be          ZCS is negligible.
carried out-of-band, and one of the 24 channels
(typically the 24th) must be reserved for signaling.      3.27     It may also be feasible to use ZCS for some
For ISDN applications, this channel is called the D       digital transmissions. In this case the nature of the
channel.                                                  digital sequence must provide adequate ones den-
                                                          sity so that no zero suppression will be invoked. An

Page 6
                                                                                          ISS 9, SECTION 32-112-153




                                                Timeslot = 1 PCM sample from one voice channel




                          Figure 3: Extended Superframe Format


                                           TABLE C
ESF FRAMING FORMAT F-BIT AND CHANNEL SIGNALING ASSIGNMENTS
 ESF                                 BIT USE IN EACH                          SIGNALING BIT
                  F-BITS
FRAME                               CHANNEL TIMESLOT                             OPTIONS
 NO.        FPS     FDL    CRC     TRAFFIC       SIGNALING               T         2             4    16
    1        -       -       -       bits 1-8
    2        -       m      C1       bits 1-8
    3        -       -       -       bits 1-8
    4        0       m       -       bits 1-8
    5        -       -       -       bits 1-8
    6        -       m      C2       bits 1-7         bit 8              -         A         A         A
    7        -       -       -       bits 1-8
    8        0       m       -       bits 1-8
    9        -       -       -       bits 1-8
   10        -       m      C3       bits 1-8
   11        -       -       -       bits 1-8
   12        1       m       -       bits 1-7         bit 8              -         A         B         B
   13        -       -       -       bits 1-8
   14        -       m      C4       bits 1-8
   15        -       -       -       bits 1-8
   16        0       m       -       bits 1-8
   17        -       -       -       bits 1-8
   18        -       m      C5       bits 1-7         bit 8              -         A         A         C
   19        -       -       -       bits 1-8
   20        1       m       -       bits 1-8
   21        -       -       -       bits 1-8
   22        -       m      C6       bits 1-8
   23        -       -       -       bits 1-8
   24        1       m       -       bits 1-7         bit 8              -         A         B         D
Notes:     1. FPS = Framing Pattern Sequence (sequence ...001011...).
           2. FDL = 4 Kbps Facility Data Link (message bits m).
           3. CRC = CRC-6 Cyclic Redundancy Check.
           4. Option T = Transparent (bit 8 for traffic).
           5. Option 2 = 2-state signaling (Channel A).
           6. Option 4 = 4-state signaling (Channels A and B).
           7. Option 16 = 16-state signaling (Channels A, B, C, and D).
Option 2 is not supported by Millennium.                                                             awc0-95


                                                                                                               Page 7
SECTION 32-112-153, ISS 9


example of such a digital signal is inverted HDLC          4.       E1 TUTORIAL
(high-level data link control).
                                                           4.1     E1 is the two-way transmission of digital
                                                           signals at 2,048,000 bits per second (2.048 Mbps). It
B.       Bipolar With 8 Zero Substitution (B8ZS)           is a communications carrier system that concen-
3.28    In data transmission as well as ISDN sig-          trates 32 digital channels onto two pairs of wires—a
naling, every bit is significant. The distortion of the    transmit pair and a receive pair.
least significant bit that the ZCS signaling format
introduces is unacceptable for data transmission           DIGITAL CHANNELS
unless restrictions are placed on the transmitted
data. Bipolar with 8 Zero Substitution (B8ZS), which       4.2     A single digital channel requires 64,000 bits
replaces long strings of zeros to allow clear-channel      per second (64 Kbps). This is DS-0 or data signal
transmission, is used for data transmission.               level zero. The E1 bandwidth of 2.048 Mbps accom-
                                                           modates 32 digital channels (64 Kbps x 32 = 2.048
3.29    The B8ZS scheme replaces any string of             Mbps). One of the channels is used for synchroniza-
eight consecutive zeros with a code that is recogniz-      tion and error reporting. Another is used for chan-
able by the receiving equipment as a deliberate            nel associated signaling. This is DS-1 at 2.048 Mbps.
change, so that the string of zeros that it replaces       Table D lists the common characteristics of DS-1
may be reintroduced into the data. In B8ZS, any            signals at 2.048 Mbps.
block of eight consecutive zeros is replaced by a line
code that contains two consecutive bipolar viola-          4.3     The E1 equipment encodes the 32 channels
tions.                                                     into digital format for transmission. At the trans-
                                                           mitting end, the 32 channels are time-division mul-
3.30    As shown in Figure 6, if the last one pulse        tiplexed into a single stream of information (bit-
preceding the string of zeros is positive, the B8ZS        stream). At the receiving end, the 32 channels are
line code is 0 0 0 +1 -1 0 -1 +1; if the last one pulse    demultiplexed into 32 separate channels.
preceding the string of zeros is negative, the B8ZS
line code is 0 0 0 -1 +1 0 +1 -1. Thus bipolar viola-      4.4     Thirty (30) of the 32 channels can be used
tions always occur in the fourth position (with the        for voice or data transmission.
last one pulse of data) and in the seventh position.
At the receiving end, a detection circuit identifies       VOICE SAMPLING
the B8ZS code words and replaces them with eight           4.5     Analog voice is encoded into a digital
consecutive zeros. In this case, no bipolar violation      bitstream by means of a pulse code modulation
error is logged.                                           (PCM) coder/decoder (CODEC). In the coding pro-
          Note: For ISDN PRI applications, B8ZS is         cess, samples of the analog voice input are taken at
          recommended, and it is required for circuit      1/8000-second intervals. Each sample is converted
          switched data applications. However, if AMI      into an 8-bit (1 data byte) code word representing
          ZCS line coding is used, the D channel must      the voltage of the analog voice input at the precise
          be programmed for 56 Kbps or 64 Kbps in-         time of sampling. This conversion produces a digital
          verted in line card programming so that the      bitstream of 64 Kbps (8 bits x 8000 samples/second).
          ones density requirements are satisfied.



                            5.18 μsec                                                 5.18 μsec
     1       0     1    1         0     1   0      1
                                                                1     0    1      1        0      1     0   1



                                                                                                  BPV




                                                awc90-98
                                                                                                            awc90-99



     Figure 4: Alternate Mark Inverted Data Byte                          Figure 5: Bipolar Violations



Page 8
                                                                                                                       ISS 9, SECTION 32-112-153



The duration of one sample (called a timeslot) is                                           FRAMING
3.91 microseconds.
                                                                                            4.8     Framing is the organization of the 2.048
4.6    PCM encoding and decoding are done per                                               Mbps bitstream into a format that can be under-
ITU-T (CCITT) recommendation G.711. In Millen-                                              stood by the receiving end. There are two framing
nium software versions before 1.09, either A-law or                                         formats: Double Frame and CRC Multiframe. In
μ-law encoding and decoding are selected on a                                               both formats, the first timeslot (0) is used for frame
system-wide basis. Software version 1.09, however,                                          synchronization. The seventeenth timeslot (16) is
supports A-law/μ-law conversion for T1 and E1 line                                          used for channel associated signaling or ISDN mes-
cards:                                                                                      sage-oriented signaling. The remaining 30 chan-
                                                                                            nels are used for voice/data traffic.
    (a) Programming for A-law or μ-law in GS OP-
    TIONS affects all cards except T1 and E1 cards.
                                                                                            A.    Double Frame Format
    (b) Line card programming for T1 and E1 cards
    specifies A-law or μ-law.                                                               4.9      In the Double Frame format (see Table E),
                                                                                            two frames constitute a superframe. In even frames,
    (c) Signal conversion occurs when the specified                                         7 of the 8 bits in the framing timeslot contain the
    encoding system for the T1 or E1 differs from the                                       framing pattern 0011011. In odd frames, one bit is
    system-wide coding in GS OPTIONS.                                                       used to send alarm indications to the remote equip-
                                                                                            ment. Five bits, (N4–N8) are used for National pur-
4.7    The digital signal processor (DSP) on the E1                                         poses. The Millennium allows any constant pattern
card converts the PCM value using values found in                                           to be transmitted in the National Bits. The National
a lookup table. When conversion is required, the                                            Bits in the received data stream are ignored. One
number of attenuations performed by the card is                                             bit in all frames is designated the International bit.
reduced to four. If the same encoding is specified by                                       The Millennium allows either a constant 0 or 1 to be
GS OPTIONS and all line card programming, the                                               sent in the International bit. The International bit
number of attenuations remains at eight.                                                    in the received data stream is ignored.




                                                                                                                   TABLE D
    X        1        2          3         4      5        6      7
                                                                                                 E1 SIGNAL COMMON CHARACTERISTICS
                                                                            8

                                                                                             CHARACTERISTICS            SPECIFICATIONS

   X                                      BPV                     BPV                        Bit Rate                   2.048 Mbps +/- 50 ppm

                                                                                             Line Code                  HDB3
  X = Last data pulse preceding a string of 8 consecutive zeros
                                                                                             Line Impedance             75 Ohm           120 Ohm
                     Detail A:       B8ZS Following A Positive Data Pulse                                               resistive        resistive
                                                                                             Nominal Pulse Amplitude    2.37 V           3V
    X        1         2         3         4       5       6       7        8
                                                                                             Nominal Pulse Width                    244 ns

                                                                                             Frame Length                           256 bits
                                          BPV                     BPV
    X
                                                                                             Frame Rate                             8 KHz

                                                                                             Frame Organization         1 eight-bit framing timeslot,
  X = Last data pulse preceding a string of 8 consecutive zeros
                                                                                                                        1 eight-bit signaling timeslot
                                                                                awc90-102
                     Detail B:       B8ZS Following A Negative Data Pulse                                               and 30 eight-bit bearer
                                                                                                                        timeslots per frame.
        Figure 6: Bipolar With 8 Zero Substitution                                                                                                aw6-1




                                                                                                                                               Page 9
SECTION 32-112-153, ISS 9




                                                           TABLE E
                                          DOUBLE FRAME STRUCTURE

                     FRAME               BITS 1 TO 8 OF THE FRAME (FRAMING TIMESLOT)
                      NO.
                                     1        2        3        4     5    6      7      8

                       0             I        0        0        1     1    0      1      1

                       1             I        1        A       N4    N5   N6     N7     N8
                                                                                         aw6-2
                 I: International Bit
                 A: Remote Alarm Indication
                 N4 - N8: National Bits




                                                           TABLE F
                                         CRC-4 MULTIFRAME STRUCTURE

          SUB                FRAME                 BITS 1 TO 8 OF THE FRAME (FRAMING TIMESLOT)
          MULTIFRAME          NO.
                                              1       2        3     4    5      6      7        8

                                0             C1      0        0      1    1     0      1         1
                                1              0      1        A     N4   N5     N6    N7        N8
                                2             C2      0        0      1    1     0      1         1
                                3              0      1        A     N4   N5     N6    N7        N8
                 I
                                4             C3      0        0      1    1     0      1         1
                                5              1      1        A     N4   N5     N6    N7        N8
                                6             C4      0        0      1    1     0      1         1
                                7              0      1        A     N4   N5     N6    N7        N8

                                 8            C1       0       0      1   1      0      1         1
                                 9             1       1       A     N4   N5     N6    N7        N8
                                10            C2       0       0      1   1      0      1         1
                                11             1       1       A     N4   N5     N6    N7        N8
                II
                                12            C3       0       0      1   1      0      1         1
                                13            E        1       A     N4   N5     N6    N7        N8
                                14            C4       0       0      1   1      0      1         1
                                15            E        1       A     N4   N5     N6    N7        N8
                                                                                                 aw6-3
          C1-C4: Cyclic Redundancy Check-4 (CRC-4) bits
          E: CRC-4 Error Indication bits
          A: Remote Alarm Indication
          N4-N8: National Bits




Page 10
                                                                                 ISS 9, SECTION 32-112-153



B.    CRC Multiframe Format                              6.2     Information received by the system is syn-
                                                         chronized to the clock source of the sending system.
4.10    In the CRC Multiframe format (Table F),          The Digital Trunk Card receiving the information
sixteen frames constitute a superframe.                  has a free-running receive circuit that synchronizes
                                                         to the received clock.
LINE CODE
                                                         6.3     Information transmitted on the TX side of
4.11    The line code used on E1 digital trunks is       the digital trunk circuit is synchronized to the
High Density Bipolar of Order 3 (HDB3). In this          system's internal System Clock III Card circuit.
scheme, a code is substituted for any four consecu-      The clock card can be synchronized through one of
tive zeros in an E1 transmission, which ensures          the Digital Trunk Cards to a network reference
sufficient ones density for clock recovery. The choice   clock source received on the card. In a private net-
of 000V or B00V as a substitution code is made so        work, however, it may furnish the network refer-
that the number of B pulses between successive V         ence clock. When the system is master of a tie-line
pulses is odd.                                           configuration, the internal clock card is the net-
                                                         work reference clock source furnished to other sys-
                                                         tems.
5.   ALARMS
                                                         6.4      In the Millennium, up to five Digital Trunk
5.1     If the Digital Trunk Card detects a Loss of      Cards can be used as potential sources for the net-
Signal or Out of Frame condition that persists for at    work reference clock. The cards used must be prop-
least 2.5 seconds, the card will declare a red alarm     erly connected, and must then be designated by
condition, indicated by the red LED on the front of      first-to-last priority in system programming. The
the line card.                                           system selects the first priority with an available
                                                         clock source, and then synchronizes the system’s
5.2    During the red alarm condition, the line
                                                         internal System Clock III Card to the selected source.
card will transmit a yellow alarm signal to the          The first priority listed should provide the system
remote equipment.                                        with the most reliable clock source available.
5.3      On a T1 span with D4 framing, the yellow        6.5     The system clock can be included in the list
alarm signal is generated by forcing the second bit      of prioritized clock sources.
of all channels to zero.
5.4    On a T1 span with ESF framing, the yellow         CONFIGURATIONS
alarm signal is generated by repetitively transmit-
                                                         6.6     The Millennium T1 facilities may be in-
ting 8 ones followed by 8 zeros over the Facility
                                                         stalled in either of two configurations: Private net-
Data Link.
                                                         work connection or CO connection.
5.5    On an E1 span, the yellow alarm signal is
                                                         6.7     In the private network connection, two or
generated by forcing bit 3 of alternating framing
                                                         more T1-equipped systems are connected with the
timeslots to one.
                                                         digital trunks programmed as tie lines with no
5.6      If the Digital Trunk Card receives a yellow     connection to the public network. The connection
alarm signal from the remote equipment, this con-        must allow for a master-slave arrangement with
dition is indicated by the yellow LED on the front of    the network reference clock source supplied from
the line card.                                           the master system. The master system is desig-
                                                         nated by assigning SYSTEM as the first priority
6.   NETWORKING                                          clock source in programming. Each slave system is
                                                         then designated by assigning a Digital Trunk Card
                                                         to receive the network reference clock source from
CLOCK SOURCE
                                                         the master system.
6.1      Digital trunk circuits have a receive side
                                                         6.8    In the CO connection, a T1-equipped Mil-
(RX) and a transmit side (TX). Information received
on the RX side is generated by the distant system        lennium is connected to the public network and
(CO or PBX). Information transmitted on the TX           communicates with a distant T1-equipped system
side is generated by the local system (Millennium).      (Millennium or other). In the CO connection, the
                                                         Millennium is always the slave system. The net-
                                                         work reference clock source (normally the CO) is
                                                         furnished through designated Digital Trunk Cards.

                                                                                                      Page 11
SECTION 32-112-153, ISS 9


The system’s internal clock is then synchronized to      7.6    On T1, the ISDN D channel is carried in
the selected clock source.                               timeslot 24, but can be carried in any timeslot. The
                                                         D channel can be run in 56-Kbps, 64-Kbps, or 64-
6.9     The Millennium can support T1 and E1 cards       Kbps-inverted mode to suit the ones density re-
in the same system. In this configuration, the sys-      quirements. On E1, the ISDN D channel is carried
tem must be equipped with a System Clock III.            in timeslot 16 (Table G) and always runs at 64
        Note: Systems that were configured before        Kbps.
        the release of the System Clock III may          7.7     The switch provides a full implementation
        already be equipped with a T1 Clock Card,        of the network side of switched network configura-
        which can serve as the clock synchroniza-        tion, including proper matching of ISDN protocol
        tion source.                                     states. This configuration can be used, for example,
                                                         to connect to another vendor's PBX that does not
7.   SIGNALING                                           support symmetric (private line) variants of ISDN
                                                         protocols.
GENERAL
                                                         7.8     If the Millennium is connected to a public or
7.1     The Millennium supports various signaling        private network PRI, it will display information
formats. The most commonly used format in North          received identifying the parties involved in the call.
America is defined in standard EIA/TIA464B. This         This information may include the following:
standard defines A and B signaling states for loop-
start, ground-start, and E&M trunks. E&M trunks              (a) Calling party number and name.
can be wink start, delay dial, or immediate start.           (b) Original called party number and name for
The Millennium supports both the trunk side                  incoming calls that have been forwarded within
(T1E1_TRUNK) and the line side (T1E1_STATION)                a public or private network.
of these signaling types.
                                                             (c) Connected party number and name.
        Note: T1 loop-start trunks support CO dis-
        connect, current open feed, as defined in            (d) Redirecting party number and name for out-
        EIA 464B.                                            going calls that have been redirected with a
                                                             public or private network by forwarding, trans-
7.2     The Millennium supports ISDN primary rate            fer, or other features.
interface (PRI) trunk signaling for voice calls over
dedicated trunks (known as B channels.) Beginning            (e) The number and name of the party to which
with software version 1.08, circuit switched data            a call was redirected in the scenario described in
applications are also supported. For more informa-           (d).
tion on circuit switched data, see section 32-112-163    7.9      The Millennium will generate calling party
in this volume.                                          numbers and names on a public or private network
7.3     The Millennium supports numerous vari-           PRI, if this capability is enabled in the B_PRI trunk
ants of non-ISDN signaling protocols used interna-       profile.
tionally, including the Ericsson loop signaling as       7.10    On a private network PRI, the Millennium
defined by ITU-T (formerly CCITT) recommenda-            will generate call redirection information (original
tion Q.421.                                              called, redirecting, and redirection number and
7.4    The Millennium supports the signaling em-         name) during invocation of the following features:
ployed by Russian outgoing, incoming local, and              (a) Call Transfer
incoming long distance trunks.
                                                             (b) Call Forwarding
ISDN PRIMARY RATE                                            (c) Remote and Directed Call Pickup
7.5      The switch supports non-facility associated         (d) Station Hunting
signaling (NFAS), which allows a D channel on one
facility to control the signaling for B channels resi-       (e) BDA Intercept
dent on other span lines. The allowable members in
an NFAS group in the Millennium is fixed at 5.               (f) Night Service
                                                             (g) Park Answer

Page 12
                                                                                                     ISS 9, SECTION 32-112-153



     (h) Recall                                                         D.     National ISDN
7.11      Call information received over a public or                    7.17     This is a common protocol used for connec-
private network PRI varies based on the central                         tion to several different types of central office equip-
office or PBX to which the Millennium is connected,                     ment in North America. See Appendix 1 for details.
and the protocol selected. Availability of this infor-
mation may be subject to a subscription option at a                     E.     NET5 (Euro-ISDN)
public network central office.
                                                                        7.18   The NET5 protocol type, also known as ETSI
7.12   The switch supports the following protocol
                                                                        or Euro-ISDN, is used for connection to the public
variants (see Appendix 1 for compatibility matrix).
                                                                        network in Europe and other markets outside North
                                                                        America.
A.    DMS-100
                                                                        7.19    PRI trunks running ETSI NET5 protocol
7.13    This protocol is used to connect to Nortel                      receive date/time information. The Millennium can
DMS-100 local central offices. Refer to Appendix 1
                                                                        designate a location as the source of this informa-
for additional information regarding connection of
                                                                        tion. The Millennium uses the date/time informa-
the Millennium to the DMS-100.
                                                                        tion from the first call received after 3 A.M. daily on
                                                                        the specified location to set the Millennium system
B.    4ESS                                                              clock.
7.14    This protocol is used to connect to the AT&T
4ESS used in the AT&T long distance network.                            F.     VN4
When connected to a 4ESS switch, the Millennium
supports AT&T's Alternate Destination Call Redi-                        7.20   This protocol is a French national PRI vari-
rection (ADCR) feature, which allows incoming calls                     ant used in countries outside North America.
that are rejected because of busy condition to be
redirected to another presubscribed location.                           G.     Q.SIG
7.15    4ESS is also used when connecting to 5ESS                       7.21     The Millennium implements the ISO ver-
central offices implementing the FTS 2000 protocol.                     sion of PSS1 (Private Signaling System 1, also known
FTS 2000 is a private network serving the U.S.                          as Q.SIG). This protocol is a worldwide standard for
government.                                                             connecting multiple vendor PBXs in private net-
                                                                        works using ISDN. It is the recommended protocol
C.    DMS-250                                                           for connecting two or more Millenniums in a pri-
                                                                        vate network. The mnemonic for the Q.SIG/PSS1
7.16   This protocol is used to connect to the Nortel
                                                                        protocol option is IQSIG_PROTOCOL, to indicate
DMS-250 used in the MCI and Sprint long distance
                                                                        that this is the ISO variant.
networks. Refer to Appendix 1 for additional infor-
mation regarding connection of the Millennium to                                  Notes:
the DMS-250.
                                                                                  1. Millennium Q.SIG implementation may
                                                                                  not be compatible with PBXs that imple-




                                                             TABLE G
                                   BIT ALLOCATION OF SIGNALING TIMESLOT 16

          Timeslot 16          Timeslot 16                  Timeslot 16                                Timeslot 16
                                                                                     - - - - -
           of frame n          of frame n+1                 of frame n+2                              of frame n+15

          00001Y11          ABCD           ABCD          ABCD          ABCD                          ABCD      ABCD
                           Channel        Channel       Channel       Channel        - - - - -      Channel   Channel
                              1             16             2            17                            15        30
                                                                                                                  aw6-4
         Y: Set to 0 during normal operation; 1 indicates loss of signaling multiframe alignment.



                                                                                                                          Page 13
SECTION 32-112-153, ISS 9


       ment the Q.SIG variant developed by ECMA           7.28   To benefit from context-sensitive help, the
       and ETSI. If you want to connect the Mil-          database must be programmed in the following or-
       lennium to another supplier's PBX using            der:
       Q.SIG, consult eOn Technical Support to
                                                               (a) Program the line card, selecting the appro-
       determine whether the two implementations
                                                               priate ABCD_SIGNALS STANDARD.
       are compatible before you install them.
                                                               (b) Program trunks on the digital line card and
       2. Proprietary enhancements have been
                                                               assign appropriate profiles.
       made to the call transfer feature to include
       a call identifier in the notifications sent from        (c) Program the profiles.
       a transferring Millennium to transferred
       parties in an eQueue.                              7.29    Most profile items apply to all trunks and
                                                          have their traditional definition. The following de-
                                                          scriptions point out profile items applicable to each
H.    AUSTRALIA
                                                          signaling system.
7.22     The switch supports the Australia Macrolink
ISDN PRI service provided by Telstra. This service        A.    TAIWAN
uses a national standard ISDN protocol, defined in
the TPH 1856 specifications. The Australian Proto-        7.30  The R1 modified signaling system is used in
col is enabled with the following programming:            Taiwan. It is selected with the following program-
                                                          ming:
     LCx       ISDN    AUSTRALIA_PROTOCOL
                                                               LCx ABCD_SIGNALS  STANDARD   Q.421
7.23    The Australian protocol supports overlap               PROFILE T1E1_TRUNKx R1_MODIFIED
sending, which is enabled by selecting OVERLAP
in the B_PRI trunk profile.                               7.31    This programming provides a two-way trunk
                                                          with disconnect and answer supervision.
7.24    This protocol does not support non-facility
associated signaling (NFAS) or D-channel backup.          7.32    These trunks typically use MF R1 tone ad-
Therefore, the ISDN level of the line card program-       dress signaling rather than pulses, so the profile
ming should remain at NFAS_GROUPNAS and                   should specify MFR1_OUT.
PRINAS.
                                                          7.33    Because the timing of MF digit sending must
       Note: Telstra in Australia plans to offer          be precise, no digits can be transmitted to the Cen-
       another PRI service, OnRamp™ Macro,                tral Office until all are collected, so the profile
       based on Euro-ISDN standards. To connect           should also specify NOVERLAP.
       to a line using this service, select NET5_
       PROTOCOL.                                          7.34    For outgoing calls, the Central Office may
                                                          request that the Millennium send the ANI of the
                                                          calling party. In this case, the ANI will be gener-
INTERNATIONAL (BIT ORIENTED)
                                                          ated as specified by the profile item OUT_CALL-
7.25     The Millennium system supports many digi-        ING_TRANSLATEx and the associated translate
tal trunk signaling system variants, with standards       table. ANI sent to the Central Office must start
as specified by ITU-T (CCITT). Applications for spe-      with the KP tone and end with the ST tone, so the
cific locations are described in the following para-      OUT digits in the translate table entries must start
graphs under the heading for each applicable loca-        with Q and end with #.
tion.
                                                          7.35    For incoming calls, the Millennium will send
7.26    The programming items in T1E1_TRUNK               a request for ANI digits to the Central Office if the
profiles depend on the signaling standard selected        profile is programmed ANI_MFR1. It will not re-
for the trunk.                                            quest ANI if the profile specifies ANI_NONE.
7.27   Only the relevant programming items are
allowed and displayed by HELP once a profile is           B.    RUSSIA
assigned to a trunk using a particular signaling          7.36   The Russian signaling system is selected
standard.                                                 with the following programming:
                                                               LCx   ABCD_SIGNALS          STANDARD   RUSSIA


Page 14
                                                                                 ISS 9, SECTION 32-112-153



7.37     Russian trunks are one-way trunks; direc-       C.     Q.421 R2 SIGNALING LOCATIONS
tion is programmed in the profile as either INCOM-
ING or OUTGOING.                                         7.45    The R2 signaling system is selected with the
                                                         following programming:
7.38    Outgoing address signaling may be done
either with MFR1 tones (MFR1_OUT) or pulses                   LCx       ABCD_SIGNALS     STANDARD      Q.421
(PULSE_OUT and PPS10). If MF tones are used,                  PROFILE    T1E1_TRUNKx      Q.421_LOOP
the timing of MF digit sending must be precise. No
digits can be transmitted to the CO until all are        This programming provides trunks with disconnect
collected. Thus the profile should specify               and answer supervision.
NOVERLAP. This restriction does not apply when
pulse dialing is used.                                   7.46 Trunks can be specified as INCOMING_
                                                         AND_OUTGOING or as OUTGOING_ONLY.
7.39    Requests from the Central Office for ANI
will be ignored if the profile specifies NANI_ RE-       7.47    Incoming and outgoing trunks can effec-
SPONSE. If ANI_RESPONSE is specified, ANI will           tively be made incoming only by denying LCR and
be built as specified by the profile item OUT_           trunk route access and programming DIL buttons
CALLING_TRANSLATEx and the associated trans-             NOUTC.
late table (see Volume 3, Section 32-112-180, Pro-
                                                         7.48    The switch supports R2 variants for several
gramming Instructions, for trunk digit translation
assignment information).                                 countries, including China, Saudi Arabia, Chile,
                                                         Philippines, Poland, Bulgaria, Russia, Venezuela,
7.40  The trunk’s class of service should specify        and Australia. The appropriate R2 variant must be
the CATEGORY (0–9).                                      programmed (see Volume 3, Section 32-112-180).
7.41     The translate table entries must specify OUT    7.49    Outgoing address signaling may be done
digits strings that contain 7 digits, typically the      either with MFR2 tones (MFR2_OUT) or pulses
office code followed by the extension digits. If the     (PULSE_OUT and PPS10). If MF tones are used,
combination of the office code digits plus the exten-    the timing of MF digit sending must be precise. No
sion digits is shorter than 7 digits, the number must    digits can be transmitted to the CO until all are
be left padded to 7 digits with the digit 0 or 2,        collected. Thus the profile should specify
depending on the Central Office. For example, if the     NOVERLAP. This restriction does not apply when
office code is 654 and 3-digit extensions are used,      pulse dialing is used.
and 2 is the appropriate filler character, the trans-
late table entry would be programmed:                    7.50     For outgoing calls, the CO may request
                                                         that the Millennium send the ANI of the calling
    INxxx     OUT2654xxx                                 party. In this case, the ANI will be generated as
7.42 Incoming trunks are designated to be either         specified by the profile item OUT_CALLING
LOCAL or LONG_DISTANCE.                                  _TRANSLATEx and the associated translate table
                                                         (see Volume 3, Section 32-112-180, for trunk digit
7.43     The Millennium requests the Central Office      translation assignment information).
to send DNIS digits with one of three tones, selected
                                                         7.51    For incoming calls, DNIS digit collection
with the programming item START_SIGNAL(1–3).
                                                         should be done in the call routing plan via a trans-
Typically, end offices use START_SIGNAL1 and
                                                         late table with a fixed number of RECEIVE digits
transit offices use START_SIGNAL3. DNIS digit            so that the Millennium can signal the Central Of-
collection should be done in the call routing plan via   fice when the last digit has been collected (refer to
a translate table with a fixed number of RECEIVE         Volume 3, Section 32-112-180).
digits. Specifying a fixed number of digits is re-
quired so that the Millennium can signal the Cen-
                                                         8.    INSTALLATION PLANNING
tral Office when the last digit has been collected
(refer to Volume 3, Section 32-112-180).
7.44    For incoming calls, a request for ANI digits
                                                                    !
                                                                    WARNING: The cable connections for
                                                               the Digital Trunk Card must be terminated
will be sent to the Central Office if the profile is
                                                               in the same building as the Millennium
programmed ANI_MFR1. No ANI request is made if                 system equipment. The cable end opposite
the profile specifies ANI_NONE.


                                                                                                     Page 15
SECTION 32-112-153, ISS 9


     the card connection must not exit the build-          tion 4162-D, product number 7056880, or equiva-
     ing.                                                  lent. The cable must have a characteristic imped-
                                                           ance of 100 ohms at 772 KHz. It must be equipped
A.    SYSTEM CONFIGURATION                                 with a solid #22 AWG drain wire.

8.1      System programming allows the 16 loca-            8.7      Terminate the cable that connects to the
tions in the card slot adjacent to a T1 or E1 line card    Digital Trunk Card with a female gender, DB-type,
to be individually assigned. Each location in the          15-pin connector, similar to AMP Part Number
adjacent slot may be assigned to the card installed        745493-5. Use a 90° exit, RFI/EMI shielded cable
in the card slot or may be used as one of the chan-        clamp with a slide latch, similar to AMP Part Num-
nels in a T1 or E1 trunk span.                             ber 745652-3. This type of clamp positions the cable
                                                           for routing beneath the cabinet with minimum strain
8.2      T1 Digital Trunk Cards can be installed           and provides secure retention when fastened to the
only in odd-numbered card slots in the equipment           Digital Trunk Card front-edge panel connector us-
cabinet. For full use of the 24-channel capability of      ing the locking posts.
the card, 8 locations in the card slot to the right of
the installed T1 Digital Trunk Card must be avail-         8.8     When connecting the Digital Trunk Card to
able. In bit-oriented clear-channel or ISDN applica-       a CSU, terminate the opposite end of the cable for
tions where a card contains a D channel, only the          compatibility with the CSU receptacle. Select the
first 7 need be available.                                 cable terminating connector and clamp to match
                                                           the CSU container arrangement. Figure 7 shows
8.3     A T1 Digital Trunk Card can be placed in           the correct connector pin functions for constructing
card slot 7, to the left of the Common Services Card,      a cable to connect the Digital Trunk Card with the
so that the 16 locations on the T1 Card can be             CSU.
combined with 8 locations on the Common Services
Card to make 24 locations, L97–L120, available for         8.9      When connecting two Millennium Digital
T1 programming.                                            Trunk Cards for Tie Line applications, construct
                                                           the cable as a null MODEM. Figure 8 shows the
8.4      E1 Digital Trunk Cards can be installed           correct connector pin functions for constructing a
only in odd-numbered card slots in the equipment           null MODEM cable. For this application, terminate
cabinet. For full utilization of the 30-channel capa-      both cable ends with female gender, DB-type, 15-
bility of the card, 15 locations in the card slot to the   pin connectors, similar to AMP Part Number 745493-
right of the installed E1 Digital Trunk Card must          5. Use 90° exit, RFI/EMI shielded cable clamps with
be available.                                              a slide latch, similar to AMP Part Number 745652-
8.5     An E1 Digital Trunk Card can be placed in          3, on both ends of the cable.
card slot 7, to the left of the Common Services II
Card, so that the 15 locations on the E1 card can be       9.   UNPACKING AND INSPECTING
combined with 15 locations on the Common Ser-
vices II Card to make 30 locations, L98–L112 and
L114–L128, available for E1 programming.
                                                                  !  WARNING: The Digital Trunk Card
                                                                and System Clock III Card contain static-
B.    CABLE CONSTRUCTION                                        sensitive components. Personnel who are
                                                                required to handle components or wiring
                                                                must have knowledge of proper handling
        !  CAUTION: The maximum length of                       techniques and must have the necessary
     the T1 connecting cable must not exceed                    safeguard equipment for protecting static-
     655 feet (200 meters).                                     sensitive devices. Refer to section 32-112-200.

8.6    A connecting cable must be constructed for          9.1    All equipment is packaged in corrugated
each T1 Digital Trunk Card installed in the equip-         cardboard containers. See Table H for part num-
ment cabinet. The constructed cable is used to con-        bers.
nect the card front-edge panel connector with ei-          9.2      Check all items received against the pack-
ther a CSU or another Millennium Digital Trunk             ing slip. Examine cartons for visual signs of dam-
Card. The cable must be #22 AWG, shielded, high-           age. If cartons appear to be damaged, make a note
frequency type, General Cable Company specifica-


Page 16
                                                                                    ISS 9, SECTION 32-112-153


                                        DIGITAL TRUNK CARD
                            FRONT-EDGE PANEL RECEPTACLE PIN FUNCTIONS




                1
                                    VIEW FROM FRONT OF CARD



      9




                2
      10




                3
      11
                       PIN    1   -   TRANSMIT DATA (A) (OUTPUT TO NETWORK)          TXT (T)



                4
      12
                       PIN    2   -   FRAME GROUND                                   GND

                5
      13


                       PIN    3   -   RECEIVE DATA (A) (INPUT FROM NETWORK)          RXT (T1)
                6      PIN    4   -   FRAME GROUND                                   GND
      14




                7

                       PIN    9   -   TRANSMIT DATA (B) (OUTPUT TO NETWORK)          TXR (R)
      15




                       PIN 11 - RECEIVE DATA (B)             (INPUT FROM NETWORK)     RXR (R1)
                8




        FEMALE                                                                 MALE
  CABLE CONNECTOR                                                        CABLE CONNECTOR
AT DIGITAL TRUNK CARD                                                         AT CSU


                                                  TRANSMIT
                 8
       15




                                                                               8
                                                  RECEIVE




                                                                                     15
                 7
       14




                                                                               7




                                                                                     14
                 6
       13




                                                                               6




                                                                                     13
                 5
       12




                     GND




                                                                               5




                                                                                     12
                 4




RXR                                                                      GND
                                                                                           RXR
       11




                     RXT




                                                                               4




                                                                                     11
                                         #22 AWG, SHIELDED,
                 3




                                                                         RXT




                                                                                            1
       10




                     GND                 HIGH FREQUENCY CABLE




                                                                               3
                                         GENERAL CABLE COMPANY




                                                                                     10
TXR                                                                      GND
                 2




                                         SPECIFICATION 4162-D
                     TXT                                                                   TXR
       9




                                                                               2
                                         PRODUCT NUMBER 7056880
                                                                         TXT




                                                                                     9
                 1




                                                                               1

                                             FEMALE
                                        CSU CONNECTOR
                                         PIN FUNCTIONS
                                 VIEW FROM FRONT OF CSU PANEL


                      PIN 1 -     TRANSMIT DATA (A)         (INPUT)    TXT
                                                                                      8




                      PIN 2 -     FRAME GROUND                         GND
                                                                               15




                      PIN 3 -     RECEIVE DATA (A)       (OUTPUT)      RXT
                                                                                      7




                      PIN 4 -     FRAME GROUND                         GND
                                                                               14




                                                                                      6




                      PIN 9 -     TRANSMIT DATA (B)          (INPUT)   TXR
                                                                               13




                      PIN 11 -    RECEIVE DATA (B)          (OUTPUT)   RXR
                                                                                      5
                                                                               12




                                                                                      4
                                                                               11




                                                                                      3
                                                                               10




                      CABLE CONNECTOR PIN-TO-PIN ASSIGNMENTS
                                                                                      2
                                                                               9




                           SYSTEM CABLE                  CSU CABLE
                                                                                      1




                            CONNECTOR                   CONNECTOR
                                PIN                         PIN
                                 1                           1
                                 2                           2
                                 3                           3
                                 4                           4
                                 9                           9
                                                                                          AWC3-152
                                11                           11


            Figure 7: Pin Functions and Cabling Arrangement - Digital Trunk Card To CSU



                                                                                                     Page 17
SECTION 32-112-153, ISS 9


of such damage on the packing slip and on the                   (c) Position the System Clock III Card as shown
carrier way bill.                                               in Figure 9 with the component side up, connec-
                                                                tor P1 aligned with connector P2 on the Common
9.3     Observing electronic equipment handling                 Services II Card, and the unattached end of each
precautions, open each carton and remove each                   of the four metal standoffs aligned with the thru-
piece of equipment. Inspect the contents for physi-             holes in the Common Services II Card.
cal damage. Make a note of any damages. As each
item is unpacked, place it on a level work surface.             (d) Apply gentle rocking pressure at connector
                                                                P2 to seat the two connectors, keeping the stand-
9.4     Report all damages noted to your supplier               offs aligned.
or distributor.
                                                                (e) From the bottom side of the Common Ser-
10. INSTALLATION PROCEDURES                                     vices II Card (as placed when removed), insert
                                                                each screw (provided) through one of the mating
10.1   This part provides instructions for install-             holes and thread into the end of a standoff.
ing the System Clock III Card, the Digital Trunk                Tighten each screw.
Card, and connecting interface cables. Only one
System Clock III Card is required per system.                   (f) Install the Common Services II Card.

        Note: The System Clock III Card must be            B.     DIGITAL TRUNK CARD (T1 or E1)
        installed before attempting system opera-
        tion with a digital trunk span.                    10.3   To install a Digital Trunk Card (T1 or E1),
                                                           proceed as follows:
A.    SYSTEM CLOCK III CARD                                         Note: No strapping configuration changes
10.2    To install the System Clock III Card, refer                 are required on the Digital Trunk Card. An
to Figure 9 and proceed as follows:                                 outline diagram of the card and the front
                                                                    panel is shown for reference in Figure 10.
     (a) Remove the Common Services II Card from
     the equipment cabinet and place it with the                (a) Remove the blank cover panel from the se-
     component side up on a protective work surface.            lected card slot.

     (b) At connector P2, remove the strapping block            (b) Position the Digital Trunk Card with the
     at terminals J6(K) and J7(M). The strapping                component side to the right.
     block will no longer be used.                              (c) Align the card with the top and bottom edges
                                                                inserted in the card guides of the selected card
                                                                slot.




                                                      TABLE H
                                DIGITAL TRUNK ORDERING INFORMATION
                              PART                              PART NUMBER
                              T1 Digital Trunk Card             500023-000-101
                              120 Ohm E1 Digital Trunk Card 500023-000-102
                              75 Ohm E1 Digital Trunk Card      500023-000-103
                              System Clock III                  500102-000-102
                                                                              aw7-405




Page 18
                                                                               ISS 9, SECTION 32-112-153




                                     DIGITAL TRUNK CARD
                         FRONT-EDGE PANEL RECEPTACLE PIN FUNCTIONS
                                 VIEW FROM FRONT OF CARD




                    1
                          PIN   1 -   TRANSMIT DATA (A)      (OUTPUT TO NETWORK)     TXT (T)
              9




                    2
              10          PIN   2 -   FRAME GROUND                                   GND


                    3
              11

                          PIN   3 -   RECEIVE DATA (A)       (INPUT FROM NETWORK)    RXT (T1)

                    4     PIN   4 -   FRAME GROUND                                   GND
              12




                    5
                          PIN   9 -   TRANSMIT DATA (B)      (OUTPUT TO NETWORK)      TXR (R)
              13




                    6



                          PIN 11 -    RECEIVE DATA (B)       (INPUT FROM NETWORK)     RXR (R1)
              14




                    7
             15




                    8




   FEMALE CABLE CONNECTOR                                            FEMALE CABLE CONNECTOR
AT SYSTEM ‘A’ DIGITAL TRUNK CARD                                  AT SYSTEM ‘B’ DIGITAL TRUNK CARD
     VIEW FROM SOCKET SIDE                                             VIEW FROM SOCKET SIDE


                                                                         TXT
                   8




                                                                               1
                                                  TRANSMIT                                 TXR
             15




                                                                                      9
                                                   RECEIVE               GND
                    7




                                                                               2




                                                                                      10
                                                                         RXT
             14




                                                                                           RXR
                    6




                                                                               3




                                                                                      11
            13




                                                                         GND
                    5




                                                                               4




                                                                                      12
            12




                        GND
                    4




                                                                               5
      RXR




                                                                                      13
            11




                        RXT                   #22 AWG, SHIELDED,
       3




                    3




                                              HIGH FREQUENCY CABLE



                                                                               6
                        GND                   GENERAL CABLE COMPANY
            10




                                                                                      14
                                              SPECIFICATION 4162-D
                    2




                                                                               7
      TXR                                     PRODUCT NUMBER 7056880
                        TXT



                                                                                      15
             9




                    1




                                                                               8




                                  NULL MODEM CONSTRUCTION
                        CABLE CONDUCTOR-TO-CONNECTOR PIN ASSIGNMENTS
                                 FOR CONNECTING TWO SYSTEMS

                           SYSTEM ‘A’                        SYSTEM ‘B’
                        CABLE CONNECTOR                   CABLE CONNECTOR
                               PIN                               PIN

                                  1                                3
                                  2                                4
                                  3                                1
                                  4                                2
                                  9                               11
                                 11                                9                       AWC3-153




            Figure 8: Pin Functions - Null MODEM Cable Between Two Digital Trunk Cards




                                                                                                      Page 19
SECTION 32-112-153, ISS 9




                      CONNECTOR P7          PIGGYBACK           CONNECTOR P6
                                            MEMORY BOARD                       SYSTEM CLOCK III CARD

 RUN INDICATOR

 SIGNALING BUS
 ACTIVITY INDICATOR



 MUSIC 1
 INPUT JACK
 MUSIC 2
 INPUT JACK



                                                                                                   CONNECTOR P1




                                                     DEPOPULATED
  CONNECTOR P3                                     FOR ILLUSTRATION
                                                      PURPOSES
                                                                                                   CONNECTOR P2




                                                     R823     FUSE F1001
                                     R822




                                                                                aw5-1143




                      Figure 9: System Clock III Orientation on Common Services II Card



Page 20
                                                                                      ISS 9, SECTION 32-112-153




                          RUN

                          BUSY

                          YEL
                    ALM
                          RED




                                                            DEPOPULATED
                                                          FOR ILLUSTRATION
                                                             PURPOSES
                                                                                                   CONNECTOR P1


                          T1
                      ISDN PRI
                                                                     EMI SHIELD
                                                                     REMOVABLE
                                       F601                          FOR ACCESS TO
     CONNECTOR P2                                                    LINE FUSES
                                       F602

                                       F603


                                       F604




                                                                                       awc3-640




                                              Figure 10: Digital Trunk Card




     (d) Grasp the small vertical handle and slide the           (b) Note the 15-pin, D-type connector on the
     card in until the two connectors (card-edge and             front-edge panel and the two locking posts lo-
     backplane) are seated.                                      cated top and bottom.
     (e) Engage and tighten the two quarter-turn                 (c) Position the correct T1 cable-in connector
     retaining screws to secure the card in place.               (female, 90° exit clamp) to mate with the card
                                                                 connector. Apply inward pressure to seat the two
C.    CONNECTING CABLES                                          mating connectors.
                                                                 (d) With the locking posts protruding through
        !  WARNING: The cable connected to                       the large slots in the slide latch, move the slide
      the Digital Trunk Card must be terminated                  latch on the connector to insert the small key slot
      in the same building housing the Millen-                   under the locking post. Check to ensure it is
      nium equipment cabinet. The cable end                      secure.
      opposite the card connection must not exit                 (e) Measure the total length of the cable and
      the building.                                              record for entry during Digital Trunk Card As-
10.4    To install the Digital Trunk Card connect-               signment programming.
ing cable, refer to Figure 11 and proceed as follows:            (f) Route the cable beneath the cabinet and
     (a) At the equipment cabinet, locate the Digital            secure at the cable tie point provided using small
     Trunk Card to be connected.                                 cable ties.




                                                                                                          Page 21
SECTION 32-112-153, ISS 9


   (g) Route the cable to the terminating equip-              000VB0VB, where B represents an inserted pulse
   ment (normally CSU) and connect the unattached             conforming to the AMI rule, and V represents an
   end at the correct equipment receptacle.                   AMI violation.
   (h) Dress and secure the cable.                            Bipolar Violation (BPV): A violation of the alter-
                                                              nating +1 -1 pattern in a three-level code.
11. GLOSSARY                                                  Channel Service Unit (CSU): A unit located on
Alarm Indication Signal (AIS): An AIS signal is               the customer premises that provides a DDS chan-
transmitted to the network interface (NI) when a              nel for use with the customer’s logic and timing
Digital Trunk Card is put out of service.                     recovery circuit.

Alternate Mark Inversion (AMI): Line code used                Clear Channel: T1 format in which all 8 bits of
with digital trunk transmission. Successive digital           each byte are data, and signaling is carried out-of-
ones (mark pulses) are of alternating positive (+)            band.
and negative (-) polarity and equal in amplitude,             CRC Multiframe. An E1 framing structure con-
and a digital zero (space no pulse) is of zero ampli-         sisting of 16 frames that includes a cyclical redun-
tude.                                                         dancy check.
Bipolar with 8 Zero Substitution (B8ZS): A code               CRC -4. On an E1 with CRC Multiframe format, all
that is substituted for any eight consecutive zeros           bits of the transmitted submultiframe are used in a
in a T1 transmission, which ensures sufficient ones           calculation, the 4 bit result of which is transmitted
density for clock recovery. The code used is




                     RUN

                     BUSY

                     YEL
               ALM
                     RED




                    T1                                               NETWORK      T1        CPE

                 ISDN PRI                                                      CHANNEL
                                                                               SERVICE
                                                                                 UNIT




                                         #22 AWG, SHIELDED,
                                         HIGH FREQUENCY CABLE
                                         GENERAL CABLE COMPANY
                                         SPECIFICATION 4162-D
                                         PRODUCT NUMBER 7056880                               AWC3-642




                            Figure 11: Cable Connections - Digital Trunk Card To CSU



Page 22
                                                                                ISS 9, SECTION 32-112-153



in the CRC bits of the subsequent submultiframe.        Inter-Exchange Carrier (IXC): A long-distance
All bits of a received submultiframe are used in a      carrier; the carrier between two LATAs.
calculation, the result of which is compared with
                                                        Intra-LATA Channel: A T1 link within a LATA.
the CRC bits of the subsequently received
submultiframe. If the result of the calculation         Jitter: Short term variation of a digital signal from
matches the received CRC value, the integrity of        ideal positions in time.
the previous submultiframe is ensured. If there is a
                                                        Local Access and Transport Area (LATA): The
difference, the error bit (corresponding to the
                                                        local telephone area, served by one telephone
errorred submultiframe) will be set to zero in a
                                                        company.
subsequently transmitted multiframe.
                                                        Network Interface (NI): The point of demarcation
CRC -6. On a T1 with ESF, all bits of the transmit-     between the customer equipment and the public
ted superframe are used in calculation, the 6 bit       switched network.
result of which is transmitted in the CRC bits of the
subsequent superframe. All bits of a received           Out-Of-Band Signaling: Signaling scheme in
superframe are used in a calculation, the result of     which the signaling information is carried outside
which is compared with the CRC bits of the subse-       the range of voice signals, as opposed to in-band
quently received superframe. If the result of the       signaling, where the signaling information is car-
calculation matches the received CRC value, the         ried with the voice signals. Out-of-band signaling is
integrity of the previous superframe is ensured.        required for clear-channel transmission.

Data Service Unit (DSU): A terminal on cus-             Pulse Code Modulation (PCM): The process in
tomer premises for the purpose of accessing the         which analog signals are sampled, digitized, and
                                                        coded into a digital bit stream.
digital data system through a standard EIA or ITU-
T interface.                                            Robbed-Bit Signaling: In each superframe of a
                                                        T1 transmission, the data in the eighth (least sig-
Digital Data System (DDS): The customer’s
                                                        nificant) bit of each sixth and twelfth frame is over-
T1-equipped or T1-compatible system.
                                                        written with signaling (off-hook and on-hook) infor-
DS0: Digital signal level zero. A single digitized      mation.
voice channel operating at 64 Kbps.
                                                        T1: The digital 1.544 Mbps 24-channel transmis-
DS1: Digital signal at the first level. A bipolar       sion which carries both voice and data.
return-to-zero T1 signal at the 1.544 Mbps rate.
                                                        Time Division Multiplexing (TDM): The process
D4: A T1 framing structure consisting of 12 frames.     of combining a number of digital signals into a
                                                        single digital stream by orderly assignment of
E1: The digital 2.048 Mbps 30-channel transmis-         timeslots.
sion that carries both voice and data.
                                                        Zero Code Suppression (ZCS): Zero code sup-
Error-Free Seconds (EFS): Time in seconds dur-
                                                        pression modifies the bit sequence 00000000 to
ing which no errors occurred.
                                                        00000001 in all data channels to ensure sufficient
Extended SuperFrame (ESF): A T1 framing struc-          transitions for clock recovery. ZCS cannot be used
ture consisting of 24 frames.                           for clear channel transmission.
Frame: On a T1 line, a frame refers to the 193
binary digit bitstream (24 eight-bit timeslots plus 1
framing bit). On an E1 line a frame refers to the 256
binary digit bitstream (32 eight-bit timeslots).
High Density Bipolar of Order 3 (HDB3): A code
that is substituted for any four consecutive zeros in
an E1 transmission, which ensures sufficient ones
density for clock recovery. The choice of 000V or
B00V as a substitution code is made so that the
number of B pulses between successive V pulses is
odd.




                                                                                                     Page 23
SECTION 32-112-153, ISS 9                                                                               SECTION 32-112-153, Appendix 1



                                                                  APPENDIX 1


 CO SWITCH TYPE               WHERE SEEN >LCn ISDN                                 NOTES
(MANUFACTURER)                           ?
 5ESS                         LEC                   NATIONAL_PROTOCOL              PRI should be set to STANDARD (National
 (Alcatel-Lucent,                                                                  ISDN) rather than CUSTOM.
 formerly Lucent
 Technologies)                FTS 2000              4ESS_PROTOCOL                  FTS 2000 is a private network serving the U.S. government.
                                                    NCOPY_PREFIX_4ESS              Set the B_PRI profile to PUBLIC_NUMBERING_PLAN.

DMS-100                       LEC                   NATIONAL_PROTOCOL              National ISDN protocol is generally the default service offering
(Nortel)                                            DMS100_PROTOCOL                from the DMS-100. The DMS-100 protocol is a secondary
                                                                                   option. If there is any doubt, confirm that the CO has its
                                                                                   protocol variant in table LCCOPT set to NTNAPRI. This is the
                                                                                   recommended protocol for new installations. Existing
                                                                                   installations using 4ESS protocol emulation need not be
                                                                                   changed, unless except to take advantage of features available
                                                                                   with the native protocol (name and call redirection information
                                                                                   delivery).
EWSD                          LEC                   NATIONAL_PROTOCOL              Request National ISDN PRI from the CO (the EWSD also
(Siemens, formerly                                                                 supports a 5ESS custom PRI emulation). The following
Siemens Stromberg-                                                                 parameters should be set to “yes” at the CO: user-provided
Carlson)                                                                           audible ring (UPARECT) and remote network interworking
                                                                                   (RNIECT).
 GTD-5                        LEC                   NATIONAL_PROTOCOL              None.
 (Ag Communications           (Telus, Verizon)
 Systems)
 4ESS                         IEC                   4ESS_PROTOCOL                  None.
 (AT&T)                       (AT&T)                NCOPY_PREFIX_4ESS

DMS-250                       IEC                   DMS250_PROTOCOL                The DMS-250 supports both a native protocol and a 4ESS
(Nortel)                      (e.g. Sprint,         4ESS_PROTOCOL                  emulation. The long-distance carrier can provide information
                              Verizon)              NCOPY_PREFIX_4ESS              regarding the variant for which the PRI is configured.
DEX-600E                      IEC                   NATIONAL_PROTOCOL              Emulates 5ESS National ISDN implementation.
(Alcatel-Lucent,              (e.g. Verizon)
formerly DSC)

LEC = Local Exchange Carrier; IEC = Inter-Exchange Carrier                                                                                         aw8-1153


 Notes:
 1. Do not use protocol settings other than those recommended for a given CO switch type. Other settings may appear to work partially,
    but differences in the PRI protocols could cause difficulties in error condition and other unusual circumstances.
 2. Distributors should consult their sales application engineer before installation if there is a request to use Millennium PRI with equipment,
    protocols, or special applications not listed here, allowing eOn Communications to determine if the Millennium is compatible with the
    requested application.
 3. The “Where Seen” list is not exhaustive. Some of the LEC CO switch types may also be seen with competitive LECs such as Verizon.
 4. The DMS-500 CO switch combines the functionality of the DMS-100 and DMS-250, for use by companies that provide both long-distance
    and local address.
 5. The term “National ISDN-1 PRI” is sometimes used to describe the current (vendor-specific) PRI protocol on the DMS CO switches. PRI
    was not standardized in National ISDN until National ISDN-2.
 6. eOn Communications Corporation does not guarantee the accuracy of information about capabilities of equipment from other companies.




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