provided by Star2Billing S.L.

Hi;

What it does to write the Wait, 2? What the 2 mean?
And why to use (Wait,2) in the first and then using it again after the DeadAGI?

Last issue: the hangup will be done before caller hangup?? So why to use it?

[a2billing]
; CallingCard application
exten => _X.,1,Answer
exten => _X.,2,Wait,2
exten => _X.,3,DeadAGI,a2billing.php
exten => _X.,4,Wait,2
exten => _X.,5,Hangup

Regards
Bilal

It's a sample dialplan, modify it to suit your own requirements.

Your particular example says,

Answer the call,
wait for two seconds
send the call into A2Billing into the default AGI-Conf (Usually 1)
At the end of the call, wait 2 seconds.
Then hangup, just to make sure.

Joe

It's all about not loading the application. Don't want too many simultaneous calls at the exact instant. Be kind to your CPU

(allow me, Nik, to correct you)

Wait() is needed on most telephone networks[1]. In ISDN, SS7[2], SIP and H323, the signaling channel is different (asynchronous) to the audio one. It is much slower in data rate, also. Sometimes[3] the media (audio) path will not respond immediately to the signalling commands. So, when a call is answered, eg., we must allow 1 second (typically) for the audio path to be setup, before we send any sound in it. If we don't, the first msecs of our sound file may never be heard by the caller.


[1] we must care for /all/ the protocols used in our call path, not only the one attached to our asterisk box.
[2] SS7, AFAIK, is the only of them that has strict limits on the responsiveness of signaling. Eg. it would never allow us 3sec to "decide" on the call routing.
[3] In fact, almost always: when a call is being setup, the first ~300msec are used for echo training, where the handsets hear nothing, but the audio path is being used.