[Asterisk-Users] TDM400P not detecting hangup and not hanging up

[Soner Tari]

> Canuck15,
>
> No, I hadn't played with the gains. But I've now done so and no difference
> unfortunately. Thanks for the suggestion though.
>
> I have discovered that after Asterisk has answered the call and the remote
> caller has hung up, if I lift the receiver on a phone connected to the 
> line
> (in parallel with Asterisk), Asterisk then DOES instantly hang up.
>
> Would it be reasonable to assume the voltage drop caused by lifting the
> receiver causes this? It only happens when I set the BATT_(whatever it 
> was)
> in wcfxs.c to 8. If I set it to a lower level, Asterisk won't even answer 
> at
> all and so nothing works.
>
> Also possibly relevant: When I disconnect Asterisk completely from the
> equation and just answer the remote caller myself, when the remote caller
> hangs up the line does not actually drop: Instead I just get a 
> "disconnect"
> (or number unobtainable) tone. Could this be the problem (i.e. there's no
> actual voltage drop happening to signal the call has ended)? Or is there
> some sort of other change in the line that I wouldn't detect audibly?
>
> Could it be that any inaudible voltage drop might be happening too quickly
> for zaptel to detect? What might I change in the source code to see if 
> this
> is the case?
>
> Does nobody else in the UK use these cards? I'm sure that's not the case. 
> So
> if you do use them, please stand up and be counted -- did you have to make
> any adjustments or did it just work "out of the box"?
>
> Incidentally, when callprogress=yes, Asterisk goes nuts and keeps 
> detecting
> strange things happening: Essentially every time the CLI comes through
> (polarity reversal) between rings, asterisk picks up and hangs up (though
> not physically - the caller hears ringing).
>
>>This may or may not be related but have you tried adjusting your RX and TX
>>gains?  I see both are at the default (0.0) which leads me to believe you
>>have not.  Search the Asterisk Wiki for the procedure.
>
> Stevanus,
>
> I think the hanguponpolarity switch is relevant to a patch to to Zaptel 
> that
> may or may not have actually been added to the released version. I'm not
> sure. However, thanks for pointing this out -- I've tried it too and 
> didn't
> get anywhere.
>
>>I have similar problems like you.
>>In the past, I did adjusted my RX and TX gain, but didn't know if it has
>>been optimal yet.
>>Fxotune is seemed do not working, perhaps caused of my asterisk's version 
>>(
>>I use stable v1.0)..
>>
>>Just curious, is rx and tx gain really a sole setting option here in order
>>to make things the way it's meant to be? Or is there others?
>>FYI, my tdm04b occasionally don't detect call-in as well as hangup signal.
>>
>>I've searched in the wiki and have activated hanguponpolarity swicth.
>>But I don't notice any difference at all.
>>
>>Any help would be greatly appreciated. (I've asked this in another thread,
>>but got no respon :( )
>
>
>
> SUMMARY OF THREAD: hardware=TDM400P 2xFXS, 1xFXO. Location=UK. *ver=1.0.9.
> Zaptel 1.0.9.1. Problem: Asterisk does not detect that the remote caller 
> has
> hung up and carries on as though nothing has happened.

Disconnect Supervision/Hangup Detection has been discussed quite extensively 
on this list. But considering the information you provide and given that you 
tried to play with BATT_THRESH setting, I tend to think that there may be 
other problems. My concern would be the opermode setting of FXO modules.

So I would get a fresh copy of asterisk and zaptel (and would not play with 
BATT_THRESH). I think the default opermode is FCC, so I would change it to 
UK. If it still does not work, I would try hanguponpolarityswitch (perhaps 
your telco provides disconnect supervision). If it still doesn't work, my 
only option would be busydetect.

Hope this helps...