[asterisk-users] [1.4] Forcing Asterisk/Zaptel to wait until calleeanswers?

[Gilles]

On Thu, 3 Mar 2011 08:42:36 -0600, "Danny Nicholas"
<danny at debsinc.com> wrote:
>Having traversed this "rabbit-hole" the answer is that it depends on your
>carrier.  If they offer "call-supervision", asterisk can wait for pickup on
>the other side.

Thanks for the tip. I don't know how to check if the landline supports
call-supervision.

>If the call goes out over a SIP connection, we start immediately, otherwise
>we play music for 9 seconds to give the line a chance to connect and pickup.
>Then we play "important" and have the user press 1 to hear the message or 2
>to get a call later.

So there's just no way for Asterisk or Zaptel to report that the line
has stopped ringing and the callee has answered the call?

Thank you.