The ISDN Service feature 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 ISDN 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 feature description 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 help you in planning, installing, and administering ISDN trunks.
ISDN supports the following features:
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), but only with ISDN-PRI.
Generalized Route Selection (GRS)
Call Identification Display - Calling Party Number (CPN) and Billing Number (BN)
Administered Connections and Access Endpoints
Interworking, or the mixture of ISDN and non-ISDN trunks and stations
Wideband Switching (H0, H11, H12, and NxDS0, but only with ISDN-PRI.
QSIG Multivendor Connectivity
Lookahead Interflow
Lookahead Routing
Usage Allocation
