Nortel Networks Remote Gateway 50 - Manual (Page 29)

Overview Page 29 of 258
Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
Networking consideration
A fault condition can occur if IP Phones use a different route to the main
office than that used by the SRG.
Capacity
Each CS 1000 main office can support up to 255 branch offices, which can be
made up of any combination of SRGs and MG 1000Bs. SRG50 supports up
to 32 IP Phone users. However, since all IP Phones register with the main
office, the governing factor is the maximum number of IP Phones that can be
supported at the main office. This means the total number of IP Phones in all
offices can be no greater than the capacity of the main office. Refer to one of
the following documents to determine the total number of phones your system
can support:
• Communication Server 1000S: Planning and Engineering (553-3031-
120)
• Communication Server 1000E: Planning and Engineering (553-3041-
120)
• Communication Server 1000M and Meridian 1: Large System Planning
and Engineering (553-3021-120)
• Communication Server 1000M and Meridian 1: Small System Planning
and Engineering (553-3011-120).
CAUTION — Service Interruption
If the network is planned so that IP Phones use a different
route to the main office than that used by the SRG, a fault
condition can occur. When the SRG can ping the main
office but the IP Phone cannot ping the main office due to
a network outage, an IP Phone registration can force the
telephone into a cycle of registering locally, being
redirected to the main office, rebooting, and then
registering locally again. When this cycle occurs, further
diagnose the network outage.