Voicemails with No Audio

[TSlocum]

There have been two occasions now where users get a voicemail, and there's no audio. The first time it happened, I figured the caller just didn't leave a message. But now that it has happened twice, I suspect a different problem. The most recent voicemail is about a minute, but it's silent. What could the problem be?

3CX 12.0.34902.600 SP4
Cisco SPA514g
Patton 4970 gateway

Let me know if there's any more information I can get that would help.

Here's the log of the call if that helps:

13-Mar-2014 09:23:32.692	Leg L:293.3[Extn] is terminated: Cause: 487 Request Terminated/INVITE from 10.11.226.117:5060
13-Mar-2014 09:23:32.621	L:293.1[Line:10000<<7658536035] forwards call from Extn:1001 to VMail:9999 based on rule Fwd[Available/NoAnsw]
13-Mar-2014 09:23:32.621	L:293.1[Line:10000<<7658536035] failed to reach Extn:1001, reason No Answer
13-Mar-2014 09:23:12.576	[CM503025]: Call(C:293): Calling T:Extn:1001@[Dev:sip:[email protected]:5060] for L:293.1[Line:10000<<7658536035]
13-Mar-2014 09:23:12.523	[CM503027]: Call(C:293): From: Line:10000<<7658536035 ("RANDOLPH FARMSI:Direct Dial" <sip:[email protected]:5060>)  to  T:Extn:1001@[Dev:sip:[email protected]:5060]
13-Mar-2014 09:23:12.523	[CM503004]: Call(C:293): Route 1: from L:293.1[Line:10000<<7658536035] to T:Extn:1001@[Dev:sip:[email protected]:5060]

 

[leejor]

Have you had someone later say that they left a message, and that it turned out to be one of the "silent" ones?
Was the caller ID included in the message? Did anyone do a follow-up, and call the person back to see if they did actually leave a message?

What type of trunks are you using? Has anyone received a call with no audio? Did you keep track of the what trunk the other "silent" message came in on?

The way I look at it...once is a fluke, twice is a coincidence, three times is a pattern.