asterisk users - Mar 2007 - Zapateller not playing audio via SIP Trunk?

Hi All

I'm tracing a very strange problem which I could reproduce with different 
versions up to 1.2.5 (sorry, didn't update to a newer one yet).

Scenario 1: Problem does not occure.
============================Sip Phone registered directly to the Asterisk.

exten => i,1,Zapateller()
exten => i,n,Playback(invalid,noanswer)
exten => i,n,Hangup()

Works like expected. I dial an invalid number, hear the SIT tone and then the 
Announcement.

Scenario 2: Problem does occure.
==========================
SIP 'trunk' to another SIP PBX (or another Asterisk).

exten => i,1,Zapateller()
exten => i,n,Playback(invalid,noanswer)
exten => i,n,Hangup()

Does not work, Zapateller seams to be 'hanging' forever without playing
any
audio.

exten => i,1,Zapateller(answer)
exten => i,n,Playback(invalid,noanswer)
exten => i,n,Hangup()

Well, this does work, but the customer would have to pay as a CDR is 
generated. We want Early Audio.

exten => i,1,Playback(invalid,noanswer)
exten => i,n,Hangup()

Strangely, this again works, so it is not a 183 Proccessing (Early Audio) 
problem, but seams to be a Zapateller Application Problem...

exten => i,1,Playback(invalid,noanswer)
exten => i,n,Zapateller()
exten => i,n,Hangup()

Early Audio Announcement is played, but then again as soon as Zapateller is 
executed, it 'hangs'.

Any idea what causes Zapateller to hang if it should play early audio via a 
SIP Trunk?

Mit freundlichen Gr?ssen

Benoit Panizzon
-- 
I m p r o W a r e   A G    -    System Services
______________________________________________________

Zurlindenstrasse 29             Tel  +41 61 826 93 00
CH-4133 Pratteln                Fax  +41 61 826 93 01
Schweiz                         Web  http://www.imp.ch
______________________________________________________
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> exten => i,1,Zapateller()
Same happens if I use PlayTones(info) instead of ZapaTeller().
Same happens if I use Progress() before ZapaTeller or Playtones.

Mit freundlichen Gr?ssen

Benoit Panizzon
-- 
I m p r o W a r e   A G    -    System Services
______________________________________________________

Zurlindenstrasse 29             Tel  +41 61 826 93 00
CH-4133 Pratteln                Fax  +41 61 826 93 01
Schweiz                         Web  http://www.imp.ch
______________________________________________________
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