Nortel SRG50, Configuration Manual

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Chapter 4 CS 2000 considerations 55
Survivable Remote Gateway 50 Configuration Guide
Configuring IP telephones for redirection
Once an IP telephone at the SRG50 is configured (refer to “Setting up IP telephones” on page 63 ),
it automatically registers with the CICM. In the case where the VoIP trunks to the main office
become unavailable, IP telephones at the SRG50 revert to local mode IF the telephones are
registered with the SRG50 and are configured for redirection.
This section describes the activities required to configure the telephones for redirection. The next
section,
“Registering the IP telephones at the SRG50: Test Local Mode” on page 61 , explains how
to register the telephones with the SRG50.
The two configuration paths for redirection are:
• Call forwarding of calls coming into the SRG50 from the local PSTN is required (that
is, the SRG50 is equipped with PSTN trunks and you want calls from the PSTN to be
call forwarded automatically to the main office DN provisioned for the IP telephone at
the SRG50).
• Call forwarding is not required.
Note: Call forwarding is not supported in SN08.