Specifications

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Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Chapter 8 Configuring Survivable Remote Site Telephony
Configuring Survivable Remote Site Telephony
Figure 8-2 Branch Office Cisco IP Phones Operating in Survivable Remote Site Telephony (SRST)
Mode
Configuring Survivable Remote Site Telephony
When SRST is enabled, Cisco IP Phones do not need to be reconfigured
individually during Cisco CallManager fallback mode because Cisco IP Phones
retain the same configuration used with the primary Cisco CallManager.
To configure SRST on the Catalyst 4224, use the following steps, beginning in
global configuration mode:
IP
IP
IP
V
PSTN
IP
network
WAN
disconnected
Central
Cisco CallManager
Catalyst 4224
Fax
Telephone Telephone
Cisco IP phones
PCs
58957
V
Task Command
Step 1
Enable SRST support and enters
Cisco CallManager fallback mode.
C4224(config)# call-manager-fallback
Step 2
Enable the Catalyst 4224 to receive messages
from the Cisco IP Phones through the specified
IP addresses and ports.
C4224(config-cm-fallback)# ip
source-address ip-address port port