I've a client with CCM 6.X cluster. He is using Avaya phones as 3rd party SIP endpoints with Cisco 7942 as SCCP. Calling b/w SIP and SCCP is fine but issue with conferencing. When SIP phone initiates conference with 2 SCCP endpoints, the SCCP phones can hear each other but neither SIP phone can hear any SCCP phone nor the SCCP phones hear SIP phone. Codec G711 all the way.
Same behaviour when SCCP endpoint pulls SIP phone into conference.
Tried Hardware CFB and CCM CFB. When the conference is initiated, the RTMT counters shows no CFB utilization although the SIP phones shows "In conference".
SCCP endpoints are able to invoke the conference bridge successfully when doing all SCCP conferencing.
M not able to find any document which can validate if it is supported or unsupported. Can someone pl comment on this?
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