I have a site in rural Kentucky that is serviced by copper DIDs. In the past, inbound calls via the DID trunks were delivered correctly to each telephone AND if unanswered would rollover to Unity. Today, the calls ring the appropriate phones but they receive a fast busy after 4 rings instead of rolling to voicemail. If I call forward the extension to Unity and call from an outside line the call immediately rings busy. All internal calls internally at the site and across our VOIP network ring and roll correctly.
I need some assistance in resolving this problem. It has been going on for several months now and the users have just reported the problem.
Tim in Tennessee
Yea, could be codec. Are you gettign MTP errors when you have calls fail? Phone to phone, rolling to VM would negotiate the correct codec, whereas if your 2811 is sending calls based on g.729 you'd need a hardware transcoder to get it back to g.711.
It could be a codec issue as unity takes calls in 711.
what gateway type, H323 or mgcp gateway?