[Asterisk-Users] Dial command problem(VOIP+*+TDM400P+Legacy PBX)

[fun]

Hello,

I just setup the Asterisk to integrate with Panasonic legacy PBX. Config as followings,

PSTN <-- PanasonicPBX--TDM400P(FXO)--AsteriskPC --> Internet

* is for AA / Voicemail and VOIP in/out

Currently the AA / Voicemail function for incoming PSTN calls are working well. 
My problem is for the incoming VOIP call. It can ring my internal extensions and talk without problem. 
But it's all :-( I can not monitor the calling progress and handle it with * because of something wrong with 
the "Dial" command. For example, ring forever if nobody answer the call, the call just be disconnected if 
called extension busy, etc.

The code is as followings. Incoming VOIP call get into [via-net], then go to [test] to dial the extension. 
>From the console, I can see the "Dial" command is excuted and always stay there if nobody answer the call.

1.Why no dial timeout? I doubt if it's because the TDM400P FXO is connected to the extension port of 
Panasonic PBX, so that it's recognized as "answered" just while DTMF tone is sent. Is it true?

2.MusicOn Hold can be heard but stop right away while extension is ringing. Seems "answered" even still 
nobody pickup the phone.

3.My Panasonic can sent the DTMF tone to indicate the status(called extension is ringback, busy, etc)
I have used this good function to finish AA for incoming PSTN call. But here I can do nothing since it stay 
on the "Dial" application and not continue (if in "Background", I can detect the tone). 
I even use the option M(macro) try to catch the tone send from Panasonic, but failed also. Anybody can
give me your comment? Thanks!

BR, Dominic

----------------------------------------
[via-net] 
exten => _1XX,1,Answer 
exten => _1XX,2,SetVar(called_ext=${EXTEN}) 
exten => _1XX,3,Goto(test,s,1)

[test] 
exten => s,1,Background(transfer) 
exten => s,2,Dial(Zap/g1/${called_ext}|10|m) 
exten => s,3,NoOp 
------------------------------------------
Message on console while FOREVER ringing, 
-- Executing Dial("IAX2/dominic at dominic/1", "Zap/g1/102|10|m") in new stack 
-- Called g1/102 
-- Started music on hold, class 'default', on IAX2/dominic at dominic/1 
-- Zap/1-1 answered IAX2/dominic at dominic/1 
-- Stopped music on hold on IAX2/dominic at dominic/1

 
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