Just did some work troubleshooting an audio delay issue with Cisco gateways, Polycom SIP IP Phones, and the Interactive Intelligence (I3) call center server.
The problem that existed was one where any calls running through the I3 experienced 2-6 seconds of delay. The root cause appears to be dynamic jitter buffers growing abnormally large almost immediately, then causing the playout of conversation to be delayed.
The cause wasn’t QoS related because calls directly between the Cisco gateways (2811’s) and the phones worked perfectly.
Calls involving the Intel HMP software on the I3 server however saw jitter on the order of thousands of milliseconds.
The “temporary” fix was to lock the jitter buffers on the HMP software to 6. This seems to have cured it.
My main question is, where in the software does the problem really lie?
I’m having an issue with our Call Manager v4.1 system and Interactive Intelligence (i3) v3.0 SU 10 with Voice Delay on calls transferred from CM to i3…Do you think having the other company set their jitter buffer to 6 would be a good first step?