[Asterisk-Users] Sangoma A200 preventing Zap channels from disconnecting immediately after PSTN line hangs up (getting empty voicemails)

[John Novack]

Mike Garey wrote:

> <snip>
>
>>
>>; How many seconds of silence before we end the recording
>>maxsilence=10
>>; Silence threshold (what we consider silence, the lower, the more sensitive)
>>silencethreshold=128
>>    
>>
>
>the maxsilence setting doesn't really help, as I believe that only
>limits how long we record for after voicemail has already started and silence is detected.  I don't want voicemail to record anything at all if the call has been disconnected before the voicemail prompt starts.
>  
>
Makes good sense.
If there is no speech, but simply x seconds of silence, the VM messges 
should  not even exist

>What I don't understand is that this works fine on many regular
>telephone answering machines, which are _much_ less advanced than
>asterisk. If they can do it, why can't asterisk? 
>
It certainly could, if someone were smart enough and willing to code it.
There generally seems more interest in adding new wiz bang features  
rather than polish up what is already mostly working.

> I mean, if I call my home line and wait for the answering machine message to kick in, then hangup right before it starts recording, I don't end up with an empty message, the system just disconnects me.
>
>  
>
Many machines work this way even after they start recording, but there 
is nothing but silence. Returned dial tone and line noise cause this to 
fail, however.

jOHN nOVACK

>  
>