I am beta testing SIP trunks to a VOIP provider, and the trunks terminate directly to the CCM 4.1 server.
Call functionality works fine. However call quality is poor. During a conversation when there is no speech, intermittent static can be heard or "background noise". When the remote party begins to speak, everything is clear and then again some "hissing" when they stop.
Normally I would associate this with VAD, however since the call is terminating directly to CCM and this option is disabled in defaults it should not be applied.
Oddly enough, calls from VPN spoke to VPN spoke or from Core to spoke over the same Internet feed are crystal CLEAR and sound amazing.
I would introduce a voice router (2800) to terminate the SIP trunks but would like to know if call quality will improve before the investment is made.
Any ideas? Thanks!