Nortel Networks SRG 50 NN43001-307 - Manual (Page 13)

Survivable Remote Gateway 13
IP branch office
solution Survivable
users Server
support Feature description
SRG 50 Release 3.0 up to 80 CS 1000
Release 5.0 VoIP and Application Gateway
Local Mode = Basic telephony
features
Extends IP Phone support to
include the IP Phone 1110.
Supports On Site Notification for
E-911 calls.
Provides H.323 and SIP trunking.
MG 1000B up to 400 Succession 3.0
CS 1000
Release 4.0
CS 1000
Release 4.5
CS 1000
Release 5.0 100% CS 1000 feature and
application redundancy in
survivable mode. Designed and
positioned for larger IP branch
offices.
Provides H.323 and SIP trunking.
MG 1000E up to 400 CS 1000
Release 5.0 Provides survivability with the
addition of Call Processor Pentium
Mobile (CP PM).
The SRG is implemented on a BCM 50 platform and is connected to a CS
1000 at the main office through Virtual Trunks over a reliable IP WAN access
facility. This configuration allows the call processing for the IP Phones at
the SRG site to be centralized at the main office. The Call Server at the
main office provides the call processing for the IP Phones registered to
both the main office and branch offices. The SRG provides call processing
functionality to phones in local mode and local analog devices. The SRG
supports business continuity and call failover through digital and analog
trunk access to the local Public Switched Telephone Network (PSTN).
In order for devices in the CS 1000 network to access analog devices at
the SRG or to access the PSTN at the SRG, virtual trunks are used over
the LAN/WAN.
If the main office fails to function, or if there is a network/WAN outage, the
SRG automatically switches to Local mode and provides basic telephony
service to the phones located at the branch office. This enables the IP
Phones to survive the outage between the branch office and the main office.
To ensure proper operation of the SRG solution it must be configured to
support a common dialing plan with the CS 1000 main office. Any other
configuration is not guaranteed to work reliably. Since the Call Server and
the SRG handle dialing slightly differently, ensure that any settings you use
for the main office that need to interact with the SRG, can be accommodated
by the SRG call processing.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright © 2005-2007, Nortel Networks
.