While everyone's suggestion is correct to use SIP end to end for better interop, I believe your current issue is related to a codec mismatch. CUCM drops the call post a TCS/OLC exchange -
004832: *Feb 14 07:22:43.073: H225.0 INCOMING PDU ::=
value H323_UserInformation ::=
{
h323-uu-pdu
{
h323-message-body releaseComplete :
{
protocolIdentifier { 0 0 8 2250 0 5 }
callIdentifier
{
guid 'A3323A7B108E11E8ADE68299DB9D59D7'H
}
}
h245Tunneling FALSE
}
}
004833: *Feb 14 07:22:43.073: //86876/A3319E53ADE4/CCAPI/cc_api_call_disconnected:
Cause Value=47, Interface=0x144B4724, Call Id=86876
004834: *Feb 14 07:22:43.073: //86876/A3319E53ADE4/CCAPI/cc_api_call_disconnected:
Call Entry(Responsed=TRUE, Cause Value=47, Retry Count=0)
Couple of things-
1. Your ITSP is doing Alaw only.
2. Your GW FS does Alaw only to CUCM.
3. CUCM is not setup for inbound FS. TCS/MSD exchange happens after CONNECT.
4. CUCM does not support Alaw -
capabilityTable
{
{
capabilityTableEntryNumber 1
capability genericControlCapability :
{
capabilityIdentifier standard : { 0 0 8 323 1 3 1 }
}
},
{
capabilityTableEntryNumber 2
capability receiveAudioCapability : g711Ulaw64k : 80
},
{
capabilityTableEntryNumber 3
capability receiveAudioCapability : g729 : 6
},
{
capabilityTableEntryNumber 4
capability receiveAudioCapability : g729AnnexA : 6
},
{
capabilityTableEntryNumber 5
capability receiveAndTransmitUserInputCapability : dtmf : NULL
},
{
capabilityTableEntryNumber 6
capability receiveAndTransmitUserInputCapability : basicString : NULL
},
{
capabilityTableEntryNumber 44
capability receiveAndTransmitUserInputCapability : hookflash : NULL
}
}
So you need to check your regions b/w the GW and the destination (IP Phone maybe in your case). Also check the VoIP DP pointing to CUCM. Is it configured with a class codec. What all codecs are defined in there or is it just hardcoded for Alaw ?
