[Asterisk-Users] Delaying answer of incoming calls

[C F]

On Apr 2, 2005 5:42 AM, Justin Ridge <spamstop1 at terriertech.com> wrote:
> Hi all,
> 
> I'd like Asterisk to answer an incoming SIP call and bridge with a POTS
> line.  However, I do NOT want Asterisk to answer the SIP call unless the
> called POTS number answers (otherwise SIP caller is charged).
> 
> The wiki says this is the default behaviour, and so does this message
> http://lists.digium.com/pipermail/asterisk-users/2004-April/041881.html
> 
> But it's not working as expected.  The SIP call is answered immediately
> before the POTS line even starts ringing.
> 
> The dial plan is simple:
> [from-sip]
> exten => s,1,Dial(Zap/1/*829xxxxxxxxx,20)

The reason is because you are using Zap, a zap channel is answered as
soon (if you are using FXO moduels) as the line goes off hook. You can
use c in the dial string so that it is not considered answered until #
is pressed by the caller.
 
> I don't have "Answer" in the dial plan.  I don't think I changed any
> settings that would cause this non-default behaviour, but can you help me
> find why this is happening?
> 
> Thanks
> JR
> 
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