[Asterisk-Users] TDM does not disconnect

[Vinícius Fontes - CANALL]

Hello all.

This is my very first message to the list. I have a TDM400P card, It  
has 2 FXO channels which are connected to extensions of my PBX  
(Ericsson BP250), so I can dial from any SIP softphone directly to  
physical (analog and digital) extensions on my company.

My PBX is configured so when I dial 8 on any extension, it will  
redirect to the first free FXO channel on my TDM400P card. Then I use  
the Asterisk's DISA application to get a dial tone, like this:


exten => s,1,disa(no-password,tdm-disa)

[tdm-disa]
exten => _XXX.,1,ChanIsAvail(Zap/3&Zap/4) ; Checks for a free channel to dial
exten => _XXX.,2,Dial(${AVAILORIGCHAN}/${EXTEN}) ; Dials the number on  
the first channel available


But if the person I'm calling does not answer the phone and I hangup  
(fisically) the extension, the Zap channels doesn't hangup! They stay  
connected, and the line I called keeps on ringing.


So, this is the entire process:

1. I pickup a physical extension, and dial 8
2. The PBX redirects the call to the first FXO channel available
3. Asterisk answers the call and gives a dial tone using the DISA application
4. I dial the number I want
5. Asterisk dials using an available Zap channel
6. If the person I called does not answer the phone, I hangup my  
extension but the FXO channels doesn't hangup!


This is the logs I got running asterisk -vvvvvvvvvvvvvvv on the  
situation above. My comments on it are rounded with []:

[I pickup my physical extension and dial 8]

     -- Starting simple switch on 'Zap/3-1'
May 17 08:48:52 NOTICE[16335]: chan_zap.c:6184 ss_thread: Got event 18  
(Ring Begin)...
May 17 08:48:52 NOTICE[16335]: chan_zap.c:6184 ss_thread: Got event 2  
(Ring/Answered)...
May 17 08:48:56 NOTICE[16335]: chan_zap.c:6184 ss_thread: Got event 18  
(Ring Begin)...
     -- Executing DISA("Zap/3-1", "no-password|tdm-disa") in new stack

[Asterisk gives me dial tone and I dial 081168345 -> 0 + my cell phone number]

     -- Executing ChanIsAvail("Zap/3-1", "Zap/3&Zap/4") in new stack
     -- Hungup 'Zap/4-1'
     -- Executing NoOp("Zap/3-1", "Canal: Zap/4") in new stack
     -- Executing Dial("Zap/3-1", "Zap/4/081168345") in new stack
     -- Called 4/081168345

[My cell phone starts to ring, I hangup my extension. Cell phone keeps  
on ringing.]

[After a while (about one minute) the following shows up]

     -- Zap/4-1 is busy
     -- Hungup 'Zap/4-1'
   == Everyone is busy/congested at this time (1:1/0/0)
     -- Hungup 'Zap/3-1'