INTEGRATED SERVICES DIGITAL NETWORK - SINGLE LINE (ISDN-SL)

PRODUCT DESCRIPTION:

ISDN Single Line is a stand alone service that provides access to the ISDN
network over a single line.  ISDN brings universal connectivity and end-to-
end digital transparency to the Public Switched Network.  It provides high-
speed digital transmission, using a standard interface and allowing
simultaneous transmission of voice, data, and images over existing telephone
lines.

CAPABILITIES:

 -    End-to-end digital transmission over ISDN compatible network
      facilities.
 -    Circuit-switched B channel data at speeds up to 64 Kbps Standard rate
      adaptation for sub-64 Kbps speeds.
 -    Packet-switched data over B or D channels (multiple virtual packet
      sessions on a single B or D channel).
 -    Out-of-band D channel signalling, a powerful and flexible mechanism for
      call control, network management, and security.
 -    Electronic key system functionality.

The value of ISDN-SL lies in its productive applications.  Its potential for
use in business and, ultimately, residential applications is virtually
limitless because ISDN is a network infrastructure.  It is a communications
platform that provides the same universal and standard connectivity for data
and integrated voice/data as the public telephone network provides for voice-
only services.

Standardized CPE, available from various vendors, has been developed for use
with ISDN:

           -    Voice/data telephones, inverse muxes.
           -    RS232C and V.35 terminal adapters.
           -    RS449 terminal adapter.
           -    ISDN Personal Computer Terminal Adapters (PCTAs), mandatory
                for work-at-home applications.
           -    Ethernet bridges.
           -    Token ring bridges.

Key technical capabilities of ISDN Single Line include:

           -    End-to-end digital transmission over ISDN-compatible network
                facilities.
           -    Up to eight ISDN terminals on a single ISDN basic rate
                interface (BRI) line.
           -    Circuit-switched B channel data at speeds up to 64 Kbps. 
                Standard rate adaption (V.120) for sub-64 Kbps speeds.
           -    Packet-switched data over B or D channels.  B channel up to
                64 Kbps.  D channel at 9.6 Kbps.
           -    X.25 packet multiplexing over B channels; i.e., multiple
                virtual D packet sessions on a single B channel.
           -    Calling party number delivery on incoming calls.
           -    Dynamic service selection over B channels.  This powerful
                capability can result in significant savings over
                conventional non-PRI trunking.
           -    Out-of-band D channel signaling.  This provides a very
                powerful and flexible mechanism for call control, network
                management, security, etc.
           -    Electronic key system functionality.

APPLICATIONS:

      -    Single line business customers who require reliability and
           bandwidth flexibility.
      -    Telecommuters.
      -    Data Private Line users.
      -    Retail credit card verification.
      -    Any consumer database user.
      -    LAN-to-LAN bridging/routing with inverse mux.
      -    Provides universal voice/data network platform for advanced
           business communications.
      -    ISDN digital transmission techniques significantly enhance the
           quality of transmission.
      -    Customers can select the mode (circuit-switched or packet-
           switched) that best fits the application, functionally and
           economically.
      -    Provides on-demand access to countless features and configuration
           through powerful D channel signalling.

For more information, call 1-800-483-4926 M-F 8am - 8pm eastern.

All trademarks are the property of their respective owners.

Copyright 1994 GTE Telephone Operations
All rights reserved