Lucent Technologies 555-230-024 manual Isdn-Pri

Data Management Solutions

Both Digital Multiplexed Interface-Bit Oriented Signalling and Digital Multiplexed Interface-Message Oriented Signalling use 23 information (bearer) channels and one signalling (data) channel multiplexed on a 1.544-Mbps Digital Signal Level 1 carrier link.

ISDN-PRI

ISDN-PRI delivers ISDN service to DEFINITY ECS for high-speed connectivity to the public switched telephone network and to other switches in a private or pub- lic network. It can also be used to connect to host computers that support the interface. PRI provides 24 64-kbps channels arranged in the North American ISDN standard of 23B plus D. That is, the 24 channels are divided into 23 bearer

(B)channels at 64 kbps for information transmission and one signalling (D) chan- nel at 64 kbps for control and signalling. Outside the United States, DEFINITY ECS also supports ISDN-PRI using the international E1 format, which provides 30B plus D.

DEFINITY ECS offers applications that use the ISDN-PRI. See Chapter 12, "Net- working Solutions" for information on these applications.

ISDN-BRI

ISDN-BRI provides an international BRI platform that offers multiple protocol options to meet specific country and application requirements. This gives the customer an inexpensive way to connect DEFINITY to ISDN services provided by their local telecommunications network provider. It provides access to Video Conferencing, Desktop Video Conferencing, Data Transmission, and other non-voice based applications that use BRI as a communication interface.

ISDN-BRI supports the following country protocols:

■Bellcore National ISDN-1 protocol in the United States (TR268)

■National protocols in Australia (AUSTEL TS013, Telecom Australia TPH 1962), Japan (NTT BRI) and Singapore (FETEX 150 TIF 218)

■ETSI NET 3 protocol (ETS 300 102) for use in most of Europe

ISDN-BRI supports multipoint (up to two devices per port) only for the Bellcore National ISDN-1 Country Protocol option.

The ISDN-BRI Trunk, also called the Trunk-Side BRI circuit pack, allows DEFINITY to support the T interface and the S/T interface as defined by ISDN standards (ITU-T recommendation I.411). The circuit pack provides eight ports to the net- work and supports two B channels and one D channel. It supports essential (not supplementary) ISDN services.

8-6Issue 5 January 1998 555-230-024