asterisk users - Apr 2006 - Dial Plan Problem with extensions ringing multiple phones connected on different * servers

Hi all

I wonder how to solve this issue:

Asterisk1: 2 BRI Cards, TE and NT Mode.
- ISDN In (From telco)
- ISDN out (to a phone) (Zap/g6)

exten => 999999,1,Dial(IAX2/key@asterisk2/999999&Zap/g6/999999)

Asterisk2: Just different kind of SIP Connections.

exten => 999999,1,Dial(SIP/999999,20,r)
exten => 999999,n,Voicemail(u999999)
exten => 999999,n,Hangup

Now when a call commes in via ISDN on the First Asterisk and both phones are 
reachable both do ring. The one picked up get's the call.

Now when the SIP phone is busy on Asterisk2 the call goes in, Asterisk2 does 
not know about the other phone ringing on Asterisk1 and redirects the call 
immediately to the voicemail. Nobody has a chance to pick up Zap/g6/999999 on 
Asterisk1.

Any idea how to solve that issue? I tought about switch => but I don't
manage
to find any docs about how to exactly use that statement.


Mit freundlichen Gr?ssen

Benoit Panizzon
-- 
I m p r o W a r e   A G    -    System Services
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Zurlindenstrasse 29             Tel  +41 61 826 93 00
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