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					Dedicated Internet Access – SBC Pacific
Bell

    Product-In-Brief

Stay Connected with Dedicated Internet Access from Pacific Bell

Dedicated Internet Access is a business class service that guarantees you a reliable, direct
Internet connection 24 hours a day, 7 days a week.



How does it work?

SBC Pacific Bell Internet Services offers services ranging from LAN ISDN for small businesses
(128Kbps), Frame Relay (56Kbps-1.5Mbps) for medium-sized businesses, and now DS3 (45Mbps)
and OC-3 (155Mbps) for large-sized enterprises.



What will it do for me?

   Dedicated Internet Access from SBC Pacific Bell offers:

   Full range of dedicated Internet Access options – SBC Pacific Bell Internet provides flexible
    dedicated Internet access service to match your business needs.

   Network Reliability, Capacity and Performance – We own and operates the transport lines
    reducing downtime, minimizing over-subscription, maximizing network throughput, and
    ensuring network integrity for customer’s business applications.

   Single Service Provider capability – We’re your one place to call for all your Internet needs.
    We’re alliance partners with the leading names in the industry, including Cisco, Sun, and
    Netscape.

   7 X 24 Customer care Technical Support – We provide coordinated, knowledgeable IP
    experts to quickly resolve Dedicated Internet Access problems so customers do not have to
    develop their own in-house expertise.



     Common Description

Dedicated Internet Access is a business class service that guarantees you a reliable, direct
Internet connection 24 hours a day, 7 days a week. When Internet service providers talk about
"dedicated" connections, they mean high-speed, high-bandwidth connections that provide
customers with full-time Internet access.




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Because a dedicated connection is "always on," it's more reliable. In the case of SBC Pacific Bell
Internet Services, you can get services ranging from LAN ISDN for small businesses (128Kbps),
Frame Relay (56Kbps-1.5Mbps) for medium-sized businesses, and now DS3 (45Mbps) and OC-3
(155Mbps) for large-sized enterprises.



Reliability

To maximize throughput, we purposely overbuilt our network and partnered with two highly
reliable Internet backbone providers to ensure full network redundancy. We track and trend all
routers and backbone provider circuits via network management tools and add additional
capacity to the network well before it's needed. Although this may not be the cheapest way for
us to do business, it ensures you get what you've paid for by avoiding the latency issues inherent
in overdriving a network.



Performance

Our network is comprised of multiple hubs connected by a redundant, high-speed DS3 (45 Mbps)
backbone network. Each hub features industry-leading equipment from Cisco Systems and
Ascend and runs on either a FDDI LAN or a Fast Ethernet network.



  Technical Description

Access Products

Asynchronous Transfer Mode (ATM)

Asynchronous Transfer Mode (ATM) helps networks process data with the most efficient method
of data transmission to date -- cell relay, a fast-packet switching technology. Customarily, most
networks are either circuit-oriented, for delivering delay-sensitive (isochronous) information like
video or voice, or packet-oriented, for high-speed data transmission. Although circuit switching
guarantees end-to-end delivery and response times, it can waste bandwidth. Packet switching,
on the other hand, optimizes bandwidth use, but has variable packet delivery times. Packet
switching is not well suited for isochronous traffic because the amount of delay between packets
results in jittery transmissions.



ATM Technology

ATM combines the reliability of circuit switching with the efficiency of packet switching, giving
you the best way to deliver all types of diverse traffic -- data, image, voice, and video. Through
simplified packet-switching techniques, ATM segments packets into 53-byte cells containing a 48-
byte information field and a 5-byte header. The header identifies cells belonging to the same
virtual channel and is used in appropriate routing. ATM speeds the cells of data over the public
network, makes quick connections, and accurately re-assembles the transmission at its
destination.

ATM is an attractive Internet access option because it provides cost-effective access for
companies requiring higher speeds than DS1 leased lines (1.544 Mbps), but not needing the full

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speed of DS3 leased lines (45 Mbps). Unlike DS3 lines, ATM has no distance-based pricing
component. SBC Pacific Bell Internet offers ATM Internet access service in the following speeds:

1.5 Mbps - 15 Mbps

3 Mbps - 20 Mbps

5 Mbps - 30 Mbps

10 Mbps - 40 Mbps



Burstable DS1 and DS3

A burstable product is not very different from the dedicated version of the same product. Lets
look at burstable DS1 (Sometimes referred to as T1. T1 is an older term that is more appropriate
for a voice line than for data. We prefer DS1 since it shows that it is a digital, not analog,
service.) A customer would order a regular DS1 connection to SBC Internet. We would then
monitor that line, taking samples of the bandwidth usage every 15 minutes of the day. Day and
night, 24 hours a day. At the end of the month all of the data points would be charted on a
graph. Our software would calculate the point on the graph where 95% of all the traffic fell
below and 5% of the traffic was higher. It is at this bandwidth figure that we would bill the
customer for the month.

Each month we would repeat this process. The customers bill could go up or down depending on
the usage that month. This product is really just like a dedicated DS1 or DS3 connection, but the
billing is variable based on usage. This means that it is really just a billing option rather that a
different product.

The are many reasons that a customer would choose a "burstable" product. If the customer has
long periods of very low usage during a month with only short periods where the full 1.54Mbps
or 45Mbps is needed, then it may be more cost effective for them to us this product. A school,
for instance, that may have high usage once a week, but little or no usage at other times, with
many school holidays or vacations may find it to their advantage to buy a burstable product.

Another scenario may be a customer who knows that they have a large need for bandwidth, but
don't know exactly how much, could use the burstable product to determine needs. A third way a
customer may require a burstable product is for a backup to their primary Internet provider. If a
customer has a primary provider they may wish to use us a backup to that provider and pay a
minimum amount each month for the luxury of having the connection available if they need it.

The burstable DS1 and DS3 products are very exciting.

The customers like the idea of "bandwidth on demand". We at SBC Internet are proud to offer
this product in our continuing effort to create and bring to market products that are relevant to
our customers and of the quality that customers expect from one of the foremost
telecommunications providers in the country.



DS1

DS1 is a dedicated, private line service designed for point-to-point communications. This 1.544
Mbps digital service is well-suited for large organizations requiring high capacity Internet

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connections. Depending upon your organization's location, you may also want to consider our
1.536 Mbps Frame Relay service, which, unlike DS1, does not include a mileage charge.



Burstable DS1

If you want private line service, but anticipate moderate Internet traffic with an occasional need
for increased bandwidth, you may want to subscribe to our burstable DS1 Internet access
service. burstable DS1 service gives you access to bandwith in the following increments:

0 - 128 Kbps

512 - 768 Kbps

128 - 256 Kbps

768 Kbps - 1.024 Mbps

256 - 384 Kbps

1.024 - 1.280 Mbps

384 - 512 Kbps

1.280 - 1.536 Mbps

As a burstable DS1 customer, you always have the full DS1 bandwidth available to you over an
unshared, non-fractional 1.544 Mbps digital leased line. Monthly billing for burstable DS1 service
is based on sustained usage levels during the month, as determined by daily traffic samples
taken every five minutes. Your monthly charge is determined by the usage level under which
95% of the samples fall. For example, if 95% of the samples taken in a given month fall below
384 Kbps but are above 256 Kbps, your usage falls into the 256 - 384 Kbps burstable usage tier.
However, the full 1.536 Mbps bandwidth is available for you to use whenever you need it.



DS3 Products

DS3 is a dedicated, private line service designed for point-to-point communications. This 45 Mbps
digital service transmits data over fiber optic cable. It is well suited for organizations requiring
very high capacity Internet connections that surpass the capabilities of DS1.



Tiered DS3

If you don't need a full 45 Mbps of bandwidth but need more than 1.544 Mbps, try our Tiered
DS3 service. With Tiered DS3 you can begin service at a lower bandwidth tier and change tiers as
necessary. Our Tiered DS3 service is available in tiers from 5 Mbps to 45 Mbps. Choose one of
the following cost-effective options to meet your needs:

5 Mbps - 20 Mbps

10 Mbps - 30 Mbps


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15 Mbps - 45 Mbps



Burstable DS3


If you want high-speed private line service but do not want to pay for a set bandwidth level, you
may want to subscribe to our burstable DS3 service. With burstable DS3 service you can burst up
to 45 Mbps as your needs dictate. burstable DS3 service gives you access to bandwith in the
following increments:



0 - 3 Mbps

13.5 - 15 Mbps

3 - 4.5 Mbps

15 - 16.5 Mbps

4.5 - 6 Mbps

16.5 - 18 Mbps

6 - 7.5 Mbps

18 - 19.5 Mbps

7.5 - 9 Mbps

19.5 - 21 Mbps

9 - 10.5 Mbps

21 - 22.5 Mbps

10.5 - 12 Mbps

22.5 - 45 Mbps

12 - 13.5 Mbps



As a burstable DS3 customer, you always have the full DS3 bandwidth available to you over an
unshared, non-fractional 45 Mbps digital leased line. Monthly billing for burstable DS3 service is
based on sustained usage levels during the month, as determined by daily traffic samples taken
every five minutes. Your monthly charge is determined by the usage level under which 95% of
the samples fall. For example, if 95% of the samples taken in a given month fall below 4.5 Mbps
but are above 3 Mbps, your usage falls into the 3 - 4.5 Mbps burstable usage tier. However, the
full 45 Mbps bandwidth is available for you to use whenever you need it.



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Frame Relay

For businesses with access requirements up to DS1, Frame Relay is one of the most cost-
effective ways to get dedicated access to the Internet today. Frame Relay is a digital service that
handles "bursty", high-speed data traffic making it ideal for Internet access.

It is a fast packet data networking service that sends data over the public network through
temporary or "virtual" connections. The connections are considered "virtual" because they are
kept open only when data is transferred or downloaded. Although the line is always connected to
the Internet, Frame Relay allocates bandwidth on an as-needed basis. By comparison, private
leased lines are always "open" and sit unused between bursts of activity.



  Benefits

Why choose SBC Pacific Bell for your dedicated Internet access? Here's several reasons:

A full range of dedicated Internet Access options -- we can match your business needs.

Network Reliability, Capacity and Performance -- SBC Pacific Bell Internet Services owns
and operates the transport lines reducing downtime, minimizing over-subscription, maximizing
network throughput, and ensuring network integrity for customer’s business applications.

Single Service Provider capability -- We're your one place to call for complete Internet
needs. We're alliance partner with the top names in the industry, including Cisco, Sun, and
Netscape.

7 X 24 Customer care Technical Support -- We provide coordinated, knowledgeable IP
experts to quickly resolve problems so you don't have to develop your own in-house expertise.



Our Network SBCIS

SBCIS is utilizing its vast networking and communications expertise to deliver Internet solutions
with exceptionally high levels of performance, availability and reliability. Our state-of-the-art data
center, robust network architecture, and proactive monitoring make it possible for us to meet the
demands of businesses throughout California, Nevada, Texas, Missouri, Oklahoma, Kansas and
Arkansas.




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