Sunday, February 26, 2012

Cisco UCM + CUE integration - in SRST scenario

In previous post I have highlighted the steps and procedures that are required for a UCM + CUE JTAPI integration:

What if the CUE is located at a branch site and the connection between UCM and CUE is broken?  When the WAN link is downed, SRST kicks in and the CUE can change from a JTAPI integration into a SIP integration, so that the SRST router can talk to CUE via SIP.

0. Assume you have the JTAPI integration in place, for normal situation when the connection between hub site and branch is up:

1. Configure CUE SIP subsystem, the gateway address is your SRST router address:

ccn subsystem sip
gateway address ""
mwi sip unsolicited

2. Configure SIP trigger, the voicemail pilot number:

ccn trigger sip phonenumber 1110
application "voicemail"

3. Configure the SIP dial-peer on your router

dial-peer voice 1110 voip
destination-pattern ^1110$
session protocol sipv2
session target ipv4:
dtmf-relay sip-notify
codec g711ulaw

4. Configure the SIP MWI:

mwi-server ipv4: expires 3600 port 5060 transport udp unsolicited

5.  Sample CME as SRST configuration
srst mode auto-provision none
srst ephone template 1
srst dn template 1
srst dn line-mode octo
max-ephones 20
max-dn 20 no-reg
ip source-address port 2000
voicemail 1110
mwi relay
max-conferences 8 gain -6
transfer-system full-consult
create cnf-files version-stamp 7960 Feb 25 2012 01:03:36
ephone-dn-template  1
call-forward busy 1110
call-forward noan 1110 timeout 20
mwi sip
huntstop channel 1

When the WAN link is downed, your branch phone can still access your local CUE, leave and retrieve voicemail as usual and the end user experience, MWI, etc will be the same. 

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