[Asterisk-Users] Disconnect supervision question

[Eric Wieling aka ManxPower]

Answering machines are a lot better at detecting hangups than Asterisk 
is.  Asterisk expects either a removal of voltage from the line or a 
reverse of polarity of the line.

BJ Weschke wrote:
>  Your line must provide disconnect supervision, which it sound like
> you say that it does, and you must configure that Zap trunk in
> asterisk for "kewl start" signaling (fxoks) which makes use of the
> disconnect supervision.
> 
> On 8/18/05, James Fogg <James at jdfogg.com> wrote:
> 
>>I'm trying to use Asterisk as a voice mail system and all is going well
>>except for one issue. When the outside caller drops the connection
>>Asterisk doesn't sense it. It keeps the line open for about 2 minutes
>>before dropping it. The FXO is attached to a key system (hybrid PBX).
>>There was a home-type digital answering machine previously on the same
>>extension and it was able to sense disconnect without any problems.
>>
>>The interface is a non-Digium single port FXO card (modem) with R13 &
>>R19 removed to mimic the Digium card. The software is the current
>>release of Asterisk at home from ISO format (self booting CD that does an
>>OS install and Asterisk compile automagically).
>>
>>My question is if Asterisk has settings to control disconnect sense, or
>>do I have to look at the key system (hybrid PBX) that it's attached to.



-- 
Eric Wieling * BTEL Consulting * 504-210-3699 x2120

r: Generate a ringing tone for the calling party, passing no audio from
the called channel(s) until one answers. Use with care and don't insert
this by default into all your dial statements as you are killing call
progress information for the user. Really, you almost certainly do not
want to use this. Asterisk will generate ring tones automatically where
it is appropriate to do so. "r" makes it go the next step and
additionally generate ring tones where it is probably not appropriate to
do so.