Isdn/Ip Gateway Connections; Dcs+ And Qsig Feature Transparency; Centralized Attendant Service; Centralized Messaging - Avaya G700 Installation And Upgrades

4 Connecting to Other Systems: Networking an Avaya

ISDN/IP Gateway Connections

When one switch in a network uses IP connections only and another uses ISDN-PRI connections only, the
two switches can communicate in a network only if another switch serves as a gateway. This means that the
IP switch and the ISDN switch must communicate through gateway connections, and the gateway switch
converts signals from ISDN to IP, and vice-versa.

DCS+ and QSIG Feature Transparency

In addition to allowing users in different locations to call each other using extensions, a private network can
support additional phone features across locations as if remote users were connected to the same switch.
This feature support, or feature transparency, includes features such as call forwarding, name display, call
transfer, and call coverage (see "Private Networking, in Administration for Network Connectivity for Avaya
MultiVantage TM Software, 555-233-504" for a complete list of supported features). Distributed
Communication System (DCS), called DCS+ when used with ISDN-PRI is the standard software for
connecting Avaya proprietary switches in the U.S. Q-signal (QSIG) is an international standard protocol for
telephony that is used internationally with E1 connections. QSIG is also a protocol that allows some level of
feature transparency between Avaya systems and non-Avaya systems.
An S8300 must be enabled via the License File for specific DCS or QSIG software options to allow this
feature transparency. Additionally, the network must use UDP. DCS+ and QSIG may be used with either IP
or ISDN-PRI trunks.

Centralized Attendant Service

The S8300 supports Centralized Attendant Service (CAS). CAS allows the attendants at the CAS main
switch to support some or all of the other switches in the network. The main switch has its own listed
directory number (LDN). Other switches redirect their attendant calls to the CAS main. In a network with
DEFINITY or S8700 switches, one of those servers will serve as the CAS main switch and will support the
S8300 switch. However, the S8300 can serve as the CAS main switch if the network consists only of other
S8300 switches.
For QSIG, CAS must be enabled via the File License. Additionally, QSIG with Path Replacement does not
work with CAS.

Centralized Messaging

In a switch network using DCS+ or QSIG, a single voice messaging system connected to one node of the
network can support users on multiple switches in the network. For an S8300 in a DCS+ or QSIG network,
the messaging system must be an Intuity AUDIX system. An S8300 can host the Intuity AUDIX system on
behalf of other switch nodes in the network only if the other nodes are also S8300 systems. An S8300 host
can support up to 50 other S8300 systems.
Centralized Messaging must be enabled via the License File. The network can use either IP or ISDN-PRI
trunks.
70
TM
S8300 Media Server to Other Switches
Installation and Upgrades for G700
555-234-100 – Issue 1 – May 2002