I have a CME version 8.6 .
I have configured MOH and it is working fine for PSTN calls or external calls.
But it is not working for internal IP Phones.
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Have you configured the multicasting for the local MOH
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I have configured multicasting for MOH as follows-
multicast moh 126.96.36.199 port 2000 route 10.91.101.15 188.8.131.52 10.91.22.5
Is this a Live Feed MOH? If yes, here is the example for Live Feed MOH:
dial-peer voice 4 pots
multicast moh 184.108.40.206 port 2000
moh out-call 2999
Please post your full configurations for multicast moh.
A few things:
Your configuration looks good. I am wondering what the IP address of the loopback interface is? It is ideal to configure the ip addresses in this fashion.
The fact that it is working on the PSTN tells me it is related to one of two things.
Mulitcast routing on your switch:
Make sure multicast routing is enabled on the switch, if the IP Phones are on a different subnet.
A problem on your platorm, that may require you to call TAC, what version of IOS are you running?