[Asterisk-Users] FXO mode

[Iain Stevenson]

Assuming this is on incoming calls, the most usual source of the problem is 
that the telco exchange either doesn't send a disconnect pulse or the wcfxo 
driver doesn't recognise the format used.  I've unfortunately forgotten the 
exact situation but, when a call finishes, a telco exchange in the US will 
momentarily remove/reverse line power.  That tells the fxo card, hence *, 
that the call is over.  If such a pulse isn't present * assumes the call is 
still in progress.  This has been discussed on the list in the past so it's 
worth googling.

  Iain



--On Wednesday, August 13, 2003 12:09 pm -0400 Joe Antkowiak <joe at jsci.net> 
wrote:

> I've had this happen with the x100p and analog phones as well...  When I
> moved to a t1 and a channel bank, the problem never happened again...
>
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Steve Meyers
> Sent: Wednesday, August 13, 2003 12:04 PM
> To: Asterisk List
> Subject: Re: [Asterisk-Users] FXO mode
>
> On Wed, 2003-08-13 at 09:46, Dave Cotton wrote:
>> I've had a few problems with my system holding the line after a call has
>> been made, just now I rebooted and noticed the following in
>> /var/log/messages
>
> When you say "holding the line", do you mean that asterisk still
> believes a channel is in use even after you hang up?  If so, I've seen
> the same thing happen several times with the X100P.  If I do "show
> channels" it will show one of my SIP phones connected to one of the
> outside lines, but if I check that SIP phone, it is not in use, and
> there is no way to re-activate the channel from the SIP phone.
>
> Running "soft hangup <zap channel>" will hangup the channel (you don't
> need to reboot).
>
> I'm not entirely sure what causes it.  So far, I've only seen it happen
> from 2 of our 9 SIP phones, but they're the ones most often on the
> phone.  It always involves an outside line, so I believe the X100P is
> the problem, but I can't be sure.
>
> What other information can I gather to pinpoint the problem?
>
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