Administrator's Guide

ISDN service
Issue 5 October 2002 1735555-233-506
The ISDN can also be used to connect ETN tandem and main switches. In this
case, the main switch collects all of the address digits from local users as well as
users at other satellite and tributary switches, and originates a call over ISDN to
the tandem switch.
Automatic Alternate Routing (AAR) and Automatic Route Selection (ARS) are
used with ISDN and DS1 trunking facilities to access ETN facilities. AAR and
ARS are used to collect the dialing information for the call that is originated from
the main switch.
DCS services
ISDN-PRI facilities can be used in a DCS arrangement whenever tie trunks are
used to connect the DCS nodes. Most DCS features are not affected by ISDN-PRI.
However, there is a minor impact on a few of the DCS features, as far as the
functions that the local and remote switches perform.
QSIG services
QSIG networking provides compliance to the International Organization for
Standardization (ISO) ISDN private-networking specifications. The QSIG
Networking platform is supported over the ISDN Basic Call setup protocol. Avaya
MultiVantage supports QSIG Supplementary Services.
Wideband Switching (ISDN-PRI only)
Wideband Switching provides support for services that require large bandwidth,
such as high-speed video conferencing. Wideband also supports multiple channel
calls end-to-end. These services have traditionally been handled by dedicated
facilities. With Wideband Switching, dedicated facilities are no longer a
requirement for these large bandwidth services.
Call-by-Call Service Selection
Call-by-Call Service Selection allows the same ISDN trunk group to carry calls to
a variety of services or facilities. Embodied in this feature is the ability to allocate
usage. It provides significant flexibility for creating user-defined incoming and
outgoing services and is used on any ISDN trunk group.
Access to Software Defined Data Network
With ISDN, the SDDN service may be accessed. SDDN provides virtual
private-line connectivity via the switched public network. The services provided
by SDDN include voice, data, and video applications. SDDN services
complement the ISDN voice services.