I have multiple site experiencing similar problems. I have 37xx routers with PRI working OK when running on CCM. When I fail the WAN SRST does not allow me to do in/outbound calls via the PRI line - I ge ta busy tone).
I am running IOS c3745-ipvoice-mz.123-8.T8.bin
The PRI works OK when running on CCM.
I have 6 digits DNs. I only use the last 2 digits from the DDI to route to DNs.
Please see config extract.
pri-group timeslots 1-31 service mgcp
no ip address
isdn switch-type primary-net5
isdn incoming-voice voice
isdn bind-l3 ccm-manager
isdn bchan-number-order ascending
no cdp enable
call application alternate DEFAULT
mgcp call-agent 22.214.171.124 2427 service-type mgcp version 0.1
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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