asterisk users - Sep 2008 - Voicemail cutting out after about 30 seconds

Greetings list,

I've had problems on a few of our asterisk boxes where voicemail tends to
cut out after about 30 seconds, despite the maximum message length being set at
240s (4m).

I've tried reducing the silence detection threshold from 128 down to 32,
which has helped, but not resolved the issue entirely.

The calls in question are being delivered to the boxes via IAX or SIP, so
it's not a Zaptel gain issue.

Has anyone else had similar problems? Is it "safe" to drop the silence
detection threshold even lower?

Thanks in advance.

Regards,

Chris

Hi,

We saw this between Asterisk and an Audiocodes gateway. Whilst the  
voicemail is being recorded asterisk is not sending *ANY* rtp. Silence  
detection will always detect silence if it listens to this side of the  
conversation. Adjusting the threshold wont work, you need to find the  
timeout for the gateway which is doing it (not always easy...)

Steve

On 24 Sep 2008, at 12:30, Chris Bagnall wrote:
> Greetings list,
>
> I've had problems on a few of our asterisk boxes where voicemail  
> tends to cut out after about 30 seconds, despite the maximum message  
> length being set at 240s (4m).
>
> I've tried reducing the silence detection threshold from 128 down to  
> 32, which has helped, but not resolved the issue entirely.
>
> The calls in question are being delivered to the boxes via IAX or  
> SIP, so it's not a Zaptel gain issue.
>
> Has anyone else had similar problems? Is it "safe" to drop the  
> silence detection threshold even lower?
>
> Thanks in advance.
>
> Regards,
>
> Chris
>
>
>
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On Wed, 24 Sep 2008, Chris Bagnall wrote:
> Greetings list,
>
> I've had problems on a few of our asterisk boxes where voicemail tends 
> to cut out after about 30 seconds, despite the maximum message length 
> being set at 240s (4m).
>
> I've tried reducing the silence detection threshold from 128 down to
32,
> which has helped, but not resolved the issue entirely.
>
> The calls in question are being delivered to the boxes via IAX or SIP, 
> so it's not a Zaptel gain issue.
>
> Has anyone else had similar problems? Is it "safe" to drop the
silence
> detection threshold even lower?
Try:

In /etc/asterisk/asterisk.conf, under

   [options]

add

   transmit_silence_during_record = yes

That stopped a remote site I was taking VoIP calls from hanging up after 
30 seconds in a custom recording setup...

Gordon