Isdn Service - Avaya Communication Manager Administrator's Manual

ISDN service

The Integrated Services Digital Network (ISDN) provides a message-oriented signaling method that
allows information to be sent along with a call and gives you access to a variety of public and private
network services and facilities. The ISDN standard consists of layers 1, 2, and 3 of the Open System
Interconnect (OSI) model. Avaya Communication Manager can be connected to an Integrated Services
Digital Network using standard frame formats: the Basic Rate Interface (BRI) and the Primary Rate
Interface (PRI).
An Integrated Services Digital Network provides end-to-end digital connections and uses a high-speed
interface that provides service-independent access to switched services. Through internationally accepted
standard interfaces, an Integrated Services Digital Network provides circuit or packet-switched
connections within a network and can link to other ISDN-supported interfaces to provide national and
international digital connections.
NOTE:
This manual does not contain procedures for working with ISDN trunk groups. Due to the
complexity of ISDN technology and the potential consequences of errors, ask your Avaya
representative to assist you in planning, installing, and administering ISDN trunks.
Brief description
ISDN supports the following:
•
Call-by-Call Service Selection (CBC)
•
Distributed Communications System (DCS). (Only ISDN-PRI supports DCS+ and DCS with
Rerouting)
•
Electronic Tandem Networks (ETN)
•
Facility Associated Signaling (FAS) and Non-Facility Associated Signaling (NFAS) (Only
ISDN-PRI supports this.)
•
Generalized Route Selection (GRS)
•
Call Identification Display
•
Administered Connections and Access Endpoints
•
Interworking (a mixture of ISDN and non-ISDN trunks and stations)
•
Wideband Switching (H0, H11, H12, and NxDS0 — only ISDN-PRI supports this.)
•
QSIG Multivendor Connectivity
•
Lookahead Inteflow
•
Lookahead Routing
•
Usage Allocation
Administrator's Guide for Avaya Communication Manager
November 2003
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Calling Party Number (CPN) and Billing Number (BN)
Feature Reference
ISDN service
1579