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.
System details:
FreePBX 5.211.65-4
Service Pack 1.0.0.0
Static IP
Details of setup are:
sip service is PennyTel.
Trunk Peer details (with changes to hide account details)…
disallow=all
allow=ulaw&alaw
canredirect=no
host=202.85.243.115
insecure=very
qualify=yes
secret=secret
type=peer
username=12345678
dtmfmode=rfc2833
No issues with inbound or internal calls.
Any help with this issue would be very much appreciated.