SRST for SIP 7841 Phone on 2921

[saleem pc]

Hello,

I configured SRST referring doc

https://supportforums.cisco.com/document/12746456/how-implement-cisco-unified-sip-srst

Cisco CUCM 11.5

CIsco 2921 Version 15.4(3)M3 with SRST enabled

IP Phones 7841 with SRST reference enabled.

Made the CUCM manually shut for testing, but phones are not registering to local srst router

voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
sip
registrar server expires max 600 min 60

voice register global
mode srst
system message "SIP SRST 2921 Service"
max-dn 100
max-pool 25
!
voice register pool 1
id network <Local IP Phone Network> mask 255.255.255.0
preference 1
proxy <SRST Router IP>
dtmf-relay rtp-nte sip-notify
codec g711ulaw
no vad
!
!

sip-ua
registrar ipv4:<CUCMIP> expires 3600
!
!

[Dennis Mink · Accepted solution]

Saleem, 

do you have an SRST reference point configured for these phones in cumc.

also, can you do a debug:

debug voice register errors

debug voice register events

debug ccsip message

Please rate if helpful

[saleem pc]

The SIP Network/IP Address were missed as it is not mandatory field