We’re running Asterisk 220.127.116.11 for our campus voicemail server and Juniper M120s as our SBC. Unanswered calls, which arrive via the SBC, are diverted to voicemail using a 302 redirect when the called party doesn’t answer. In this case the caller is able to hear the greetings and begin to leave a message only to have Asterisk terminate the call mid-recording.
We’re uncertain why this is happening and this is where we are hoping you can help. In our environment the caller is any set on the PSTN. They call one of our IP phones which no one answers. Our proxy, SER, responds to the SBC with a 302 redirect and the call is diverted to Asterisk. The caller hears the unavailable greeting for 6-4050, begins to leave a message and is cut-off after about 10 seconds. In an ngrep trace we see Asterisk receive an ACK from the SBC and it immediately responds with a BYE message for that call.
Has anyone else experienced this type of issue?