158 lines
6.6 KiB
Plaintext
158 lines
6.6 KiB
Plaintext
SWITCHED DIGITAL SERVICE 56 (SDS 56)
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DESCRIPTION
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SDS 56 is a digital telecommunications service available from
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Pacific Bell.
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It is a low-cost digital, dial-up alternative to leased lines or
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analog services.
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CAPABILITIES
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------------
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Switched 56 is easy to use -- you simply dial another user's
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Switched 56 number to transmit data at 56 Kilobits per second
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(Kbps). And it's affordable -- your data call won't cost any more
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than a regular voice call. For all of these reasons, Switched 56 is
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especially suited to intermittent, high-speed data transmission
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applications.
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EASE OF USE: A standard telephone number is provided for placing
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and receiving Switched 56 calls, including 1+, 7 and 10 digit
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intraLATA , interLATA and international dialing.
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PRICING: Pricing is similar to regular telephone service -- You pay
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only for what you use: a low, flat monthly charge plus intraLATA
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transport at existing voice usage rates, with time-of-day discounts.
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RELIABILITY: Pacific Bell Switched 56 services are designed to
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exceed the minimum performance thresholds; they have a Bit Error
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Rate of 8.9 x 10(-8) and 95 percent Error Free Seconds (EFS) on 99
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percent of end-to-end intraLATA calls.
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SUPPORT: All of our data transport products and services are backed
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by extensive network services experience and highly trained
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professionals. If your require assistance, call us 24 hours a day,
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and day of the year.
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COMPATIBILITY
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To ensure the quality and reliability of Pacific Bell Switched 56,
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we've designed and engineered the Pacific Bell Circuit Switched Data
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56 (CSD 56) network exclusively for switched digital data services.
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Pacific Bell offers three products which provide Switched 56
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capability using the CSD 56 network: Centrex IS, CenPath, SDS IS
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and SDS 56. These products connect to the CSD 56 network and are
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fully interoperable with all other connected services, including
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Switched 56 services from other local exchange carriers (LECs) and
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inter-exchange carriers (IECs). As a result, Pacific Bell Switched
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56 users can complete local, long distance, interstate and even
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international calls.
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You have a choice of IECs on demand.
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WHAT YOU NEED
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-----------------
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You need special equipment to use Switched 56 services, which varies
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depending on the application. In all cases you need a DSU (either a
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Datapath compatible two-wire DSU or a four-wire Switched 56 DSU with
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dialing capability.
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Pacific Bell has arrangements with equipment manufacturers to help
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you select and install the correct equipment.
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BUSINESS USES FOR SDS 56 and SWITCHED 56
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-----------------------------------------------
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VIDEO CONFERENCING: This exciting application allows businesses to
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hold face-to-face, interactive meetings between people in two or
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more locations. While the cost of data transport previously put
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video conferencing out of the reach of many companies, Switched 56
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services make it affordable. Most video codecs (used for video
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conferencing) are designed to take two Switched 56 inputs and
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automatically combine them for 112 Kbps.
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HIGH SPEED BULK DATA TRANSPORT: Switched 56 offers the speed of
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dedicated services and the economy of dial-up for transferring data
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files. Applications include uploading/downloading, terminal to host
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access, database access and shared library resources.
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IMAGING: With Switched 56, users can quickly exchange high quality
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images, replacing overnight courier services. Imaging applications
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include advertising layouts, radiology images, real estate listings,
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digitized microfiche, electronic publishing and digitized
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fingerprints.
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DISASTER RECOVERY/BACKUP: If your are using a 56 Kbps Digital Data
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Service (DDS) or Advanced Digital Network (ADN) circuit, it makes
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sense to back it up with digital Switched 56 rather than a slower
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speed analog dial-up service. That way, you can enjoy digital
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service and maintain productivity even during a disaster situation.
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GROUP IV FAX: Group IV fax offers superior resolution and is, at a
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minimum, five times faster than Group III fax (the current
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standard). Switched 56 offers a flexible and low-cost method for
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connecting your Group IV machines together. Group IV fax is great
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for blueprints, library documents, legal documents and detailed
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graphics.
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HIGH SPEED TELECOMMUTING: For telecommuters using high speed
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workstations, Switched 56 alleviates the communications bottleneck
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caused by modems and analog lines.
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HIGH QUALITY DIGITIZED AUDIO (7.5 Khz): Many radio stations are
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installing Switched 56 service to broadcast from remote locations
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instead of using satellite transmission or leased lines.
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CONNECTING LANS: SDS 56 can be a cost-effective way to link distant
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LANs. With the right equipment, data destined for a remote LAN can
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be recognized and the line automatically dialed for a connection
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through SDS 56.
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CONNECTING REMOTE USERS TO LANS: SDS 56 can be a cost-effective way
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to connect remote users (PCs, Macintoshes and workstations) to their
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company LAN or host computer.
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AVAILABILITY
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Like our other Switched 56 products, SDS 56 transmits data at a
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full-duplex, digital synchronous 56 Kbps rate for the price of a
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voice phone call. SDS 56 significantly increases Pacific Bell's
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Switched 56 availability to more than 80% of our business
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customers. With SDS 56 technology, Pacific Bell can now offer
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Switched 56 service to customers who previously could not be served
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because of technical limitations. In addition, SDS 56 provides a
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Switched 56 option for our not-Centrex customers.
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To increase the availability of Switched 56 service, SDS 56 will be
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provided using either two- or four-wire technology. The distance
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from your central office (where the telephone switch is) will
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determine which of these technologies will be used -- the four-wire
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option extends the service farther.
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You can call the Switched Data hotline at 800-995-0346 to find out
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about availability for your telephone prefix.
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Pacific Bell will work with the inter-exchange carrier (IEC) of your
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choice, who provides the long distance portion of your transport.
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TO GET MORE INFORMATION
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-----------------------------
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Contact your Pacific Bell account team for more information.
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For fax-back information on any of Pacific Bell's switched digital
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products, call 800-995-0346. The fax-back system has diagrams and
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other information not on this BBS.
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Application example diagrams are available on this BBS for
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download. Go to the main menu and visit the FILES FOR DOWNLOAD area.
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** Product names mentioned herein may be trademarks and/or
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registered trademarks of their respective companies.**
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