Specifications

Setting Up the Network
How to Set Up the Network
46
Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
DETAILED STEPS
Example
The following example sets a keepalive interval of 45 seconds:
call-manager-fallback
keepalive 45
Configuring Cisco Unified SRST to Support Phone Functions
Tip When the Cisco Unified SRST is enabled, Cisco IP phones do not have to be reconfigured while in
Cisco Unified CallManager fallback mode because phones retain the same configuration that was used
with Cisco Unified CallManager.
To configure Cisco Unified SRST on the router to support the Cisco IP phone functions, use the
following commands beginning in global configuration mode.
SUMMARY STEPS
1. call-manager-fallback
2. ip source-address ip-address [port port] [any-match | strict-match]
3. max-dn max-directory-numbers [dual-line] [preference preference-order]
4. max-ephones max-phones
5. limit-dn {7910 | 7935 | 7940 | 7960} max-lines
6. exit
Command or Action Purpose
Step 1
call-manager-fallback
Example:
Router(config)# call-manager-fallback
Enters call-manager-fallback configuration mode.
Step 2
keepalive seconds
Example:
Router(config-cm-fallback)# keepalive 60
Sets the time interval, in seconds, between keepalive
messages that are sent to the router by Cisco IP phones.
• seconds—Range is 10 to 65535. Default is 30.
Step 3
exit
Example:
Router(config-cm-fallback)# exit
Exits call-manager-fallback configuration mode.