This issue is intermittent but seems to occur when the pbx has not been used for a period of time - say 30 minutes or more although this is not definitive.
The fault can best be described as…
An outbound call is initiated from A to B.
A picks up the phone (Polycom 601), hears a dial tone and dials the number. From this point, A does not hear any more sound.
Meanwhile B’s phone rings and they try and answer but “nobody is there”.
A hangs up and redials immediately. The call goes through perfectly.
Service Pack 188.8.131.52
Details of setup are:
sip service is PennyTel.
Trunk Peer details (with changes to hide account details)…
No issues with inbound or internal calls.
Any help with this issue would be very much appreciated.