We have been having trouble with our voicemail cutting callers off when leaving a message. This doesn’t happen every time someone leaves a message, but it does occur roughly 40% of the time.
Callers can call into our system, go through the auto-attendant and arrive at one of our user’s vmail boxes. They are able to successfully leave a message and exit the system. However, when we go to retrieve these messages all that remains is the callback number (if provided by *) and an empty (1 second or less) message. The same is true of the emailed message attachment sent by * to the user’s email account. It is nothing but an empty attachment. Again this occurs roughly 40% of the time. It is not limited to any one particular user–this occurs with all users.
We are using * 1.2.13 and have our PSTN link up through VoicePulse. We have 2 VOIP servers on our network, one internal to our office and the other on our internet-facing side at a collocation. The two servers are running Fedora 5, and have an OpenBSD firewall between them. The two servers are connected with a T1 Point to Point 1.5Mbit pipe.
It is important to note that this happens internally as well. One internal extension can call another internal extension and leave a voicemail, which the recipient does not receive. With this in mind, I would think it valid to eliminate the internet-facing * server as a culprit and only focus on the internal box and firewall.
I cannot imagine this a firewall issue since roughly half of our voicemails come through. The same goes for permissions issues–if this was so I would imagine that we would not receive any voicemails at all.
Any suggestions or additional info I should provide to help troubleshoot this?
Thanks in advance for help with this mind-bending issue…