Re: No voice path when PABX crosses router to Telco
If these two routers have multiple IP addresses, you will want to use the 'mgcp bind media' command to make sure they're communicating using the IP addresses you expect. There are some issues with this command in early 12.4 mainline, so use 'show mgcp' to confirm that the bind command has taken.
Generally one-way audio issues are caused by:
In this case it sounds like something other than a DSP problem because you have successful calls through the gateways.
I would get a 'show call active voice brief' and look at the tx/rx packets for the call legs pointing towards the other MGCP gateway. Make sure that you see the IP addresses that you expect, and that you can ping between them.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
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