asterisk users - Jan 2007 - Disconnect Supervision UK / BT solution?

Hi all

I'm using sangoma a200 cards in the UK and have the ongoing, often noted
problem of disconnect supervision with BT POTS lines.

Just noticed this post on
http://www.voip-info.org/wiki/view/UK+Asterisk+Details
stating that potentially someone's got a solution :

"TDM400P & Not Detecting Hangups:

 Got a TDM400P installed and having problems with Asterisk not detecting
hangups? Using BT? If so, contact BT and ask what the "Disconnect Clear
Time" setting is for your phone line. Odds are it's probably 100.
Increasing
it to 800 fixed the issue for me.

"Disconnect Clear Time" is BT's name for CPC. "


Does anyone have any thoughts/confirmation about this finally being a viable
solution?  This disconnect supervision problem has plagued TDM and Sangoma
cards for a long time!

Comments appreciated before I get on the phone with BT


--
Chris Earle
System Solutions Specialist


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> Does anyone have any thoughts/confirmation about this finally being a
viable
> solution?  This disconnect supervision problem has plagued TDM and Sangoma
> cards for a long time!
>   
Just to be clear, what is the exact "disconnect problem" that you see?

I have three TDM cards in two different systems, one using PBX lines and 
one on a private BT line.  Both of them have trouble detecting a caller 
who is ringing, but then hangs up before being answered by the asterisk 
system

However, *all* of them are absolutely fine at spotting a normal hangup 
once the call is connected and I see no random disconnects during calls 
either.

Can you confirm that this is what you mean, or whether it's something else?

Ed W

Well,

I have just phoned BT today who said they can increase the CPC value  
on the line - however it needs to be done at the exchange - and has  
been booked for Tues.

I suppose I will know wether this worked on Tues :-) - I shall post  
my findings.

Regards

--
Matt Brown



On 19 Jan 2007, at 16:46, Chris Earle ((CBL)) wrote:
> Hi all
>
> I'm using sangoma a200 cards in the UK and have the ongoing, often  
> noted
> problem of disconnect supervision with BT POTS lines.
>
> Just noticed this post on
> http://www.voip-info.org/wiki/view/UK+Asterisk+Details
> stating that potentially someone's got a solution :
>
> "TDM400P & Not Detecting Hangups:
>
>  Got a TDM400P installed and having problems with Asterisk not  
> detecting
> hangups? Using BT? If so, contact BT and ask what the "Disconnect  
> Clear
> Time" setting is for your phone line. Odds are it's probably 100.
> Increasing
> it to 800 fixed the issue for me.
>
> "Disconnect Clear Time" is BT's name for CPC. "
>
>
> Does anyone have any thoughts/confirmation about this finally being  
> a viable
> solution?  This disconnect supervision problem has plagued TDM and  
> Sangoma
> cards for a long time!
>
> Comments appreciated before I get on the phone with BT
>
>
> --
> Chris Earle
> System Solutions Specialist
>
>
> -- 
> This message has been scanned for viruses and
> dangerous content and is believed to be clean.
>
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