Specifications

Setting Up Secure Survivable Remote Site Telephony
How to Configure Secure SRST
134
Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
Examples
The following example enables SRST mode on your router.
Router(config)# call-manager-fallback
Router(config-cm-fallback)# secondary-dialtone 9
Router(config-cm-fallback)# transfer-system full-consult
Router(config-cm-fallback)# ip source-address 10.1.1.22 port 2000
Router(config-cm-fallback)# max-ephones 15
Router(config-cm-fallback)# max-dn 30
Router(config-cm-fallback)# transfer-pattern .....
Router(config-cm-fallback)# exit
Verifying Phone Status and Registrations
To verify or troubleshoot IP phone status and registration, complete the following steps beginning in
privileged EXEC mode.
SUMMARY STEPS
1. show ephone
2. show ephone offhook
3. show voice call status
4. debug ephone register
5. debug ephone state
DETAILED STEPS
Step 1 show ephone
Use this command to display registered Cisco Unified IP Phones and their capabilities. The show
ephone command also displays authentication and encryption status when used for secure SRST. In this
example, authentication and encryption status is active with a TLS connection.
Router# show ephone
ephone-1 Mac:1000.1111.0002 TCP socket:[5] activeLine:0 REGISTERED in SCCP ver 5
+ Authentication + Encryption with TLS connection
mediaActive:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0
IP:10.1.1.40 32626 7970 keepalive 390 max_line 8
button 1: dn 14 number 2002 CM Fallback CH1 IDLE
ephone-2 Mac:1000.1111.000B TCP socket:[12] activeLine:0 REGISTERED in SCCP ver
5 + Authentication + Encryption with TLS connection
mediaActive:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0
IP:10.1.1.40 32718 7970 keepalive 390 max_line 8
button 1: dn 21 number 2011 CM Fallback CH1 IDLE
ephone-3 Mac:1000.1111.000A TCP socket:[16] activeLine:0 REGISTERED in SCCP ver
5 + Authentication + Encryption with TLS connection
mediaActive:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0
IP:10.1.1.40 32862 7970 keepalive 390 max_line 8
button 1: dn 2 number 2010 CM Fallback CH1 IDLE