SRST not working

Unanswered Question
Dec 11th, 2007

Here is my config... Can anyone see why this would not work. IOS is 12.4, SRST is 3.3

I have this problem too.
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i believe you need to define "max-ephones" and "max-dn" under telephony service.

here is a working config.


secondary-dialtone 9

max-conferences 6 gain -6

transfer-system full-consult

ip source-address port 2000

max-ephones 30

max-dn 64

dialplan-pattern 1 .......... extension-length 4

transfer-pattern 9T

default-destination 8650

voicemail 8950

alias 1 8610 to 8650

time-zone 5


please rate helpful posts.


Tommer Catlin Wed, 12/12/2007 - 12:37

After it is configured on the router, you have to configure it on CUCM. Setup the SRST profile, add it to the device profile you want. Reset and reboot all devices in that device profile. This will then push out the SRST information to the IP phones. When the connection is lost to CUCM at the IP phone, it will have the SRST information on the device and fail to the router configured in the SRST profile.


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