asterisk users - Oct 2008 - Hang up detection with TDM400P and Telewest/Virgin Media line

Folks,

I've seen a few reports that people have had problems with hang up
detection on UK cable phone lines.  I have a TDM400P with two FXO ports,
one connected to my BT line and the other connected to my
Telewest/Virgin Media cable line.  If I ring the BT line and then clear
down, Asterisk detects this and acts accordingly.  If I ring the
Telewest line, the clear down is not detected, hence Asterisk continues
to ring extentions, record voicemail, etc.

I've seen a few posts reporting this issue with the UK cable system but
these are generally not resolved.

Has anyone sucessfully configured a UK Telewest line with Astersik?
Does anyone know how Telewest signals that the remote caller has cleared
down?

On the same topic, how does BT signal remote clear down?

I have plugged a phone into the Telewest line and it doesn't appear to
receive a tone on clear down, nor does it appear to drop power on the
line.  Just in case, I changed the DCT in zaptel.h from 500ms to 100ms and
recompiled, however, this did not resolve the issue.

I'm working blind at the moment as I cannot find anything which
documents what to expect the Telewest line to do to signal a remote
clear down occured.  I've played around with the kewlstart and
loop-start setting but without knowing what the line is going to do,
it's difficult to know how to configure Asterisk.

Does anyone have any experience of Telewest?

Thanks,
Mike.

Mike,

Can you tell us :

- asterisk version
- zaptel version

When you call over this line, when you hangup did you hear an busy
tone ? or any class tone ? To do this test connect your lines to
analog phone and make a call. Let's us know the results.

Regards,

Luis Morales

On Fri, Oct 10, 2008 at 4:48 AM, Mike <mike at derbywireless.net>
wrote:
> Folks,
>
> I've seen a few reports that people have had problems with hang up
> detection on UK cable phone lines.  I have a TDM400P with two FXO ports,
> one connected to my BT line and the other connected to my
> Telewest/Virgin Media cable line.  If I ring the BT line and then clear
> down, Asterisk detects this and acts accordingly.  If I ring the
> Telewest line, the clear down is not detected, hence Asterisk continues
> to ring extentions, record voicemail, etc.
>
> I've seen a few posts reporting this issue with the UK cable system but
> these are generally not resolved.
>
> Has anyone sucessfully configured a UK Telewest line with Astersik?
> Does anyone know how Telewest signals that the remote caller has cleared
> down?
>
> On the same topic, how does BT signal remote clear down?
>
> I have plugged a phone into the Telewest line and it doesn't appear to
> receive a tone on clear down, nor does it appear to drop power on the
> line.  Just in case, I changed the DCT in zaptel.h from 500ms to 100ms and
> recompiled, however, this did not resolve the issue.
>
> I'm working blind at the moment as I cannot find anything which
> documents what to expect the Telewest line to do to signal a remote
> clear down occured.  I've played around with the kewlstart and
> loop-start setting but without knowing what the line is going to do,
> it's difficult to know how to configure Asterisk.
>
> Does anyone have any experience of Telewest?
>
> Thanks,
> Mike.
>
> _______________________________________________
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-- 
---------------------------------------------------------------------------------
Luis Morales
Consultor de Tecnologia
Cel: +(58)416-4242091
---------------------------------------------------------------------------------
"Empieza por hacer lo necesario, luego lo que es posible... y de
pronto estar?s haciendo lo imposible"

Leonardo Da'Vinci
---------------------------------------------------------------------------------

On Thu, 9 Oct 2008, Mike wrote:
> Folks,
>
> I've seen a few reports that people have had problems with hang up
> detection on UK cable phone lines.  I have a TDM400P with two FXO ports,
> one connected to my BT line and the other connected to my
> Telewest/Virgin Media cable line.  If I ring the BT line and then clear
> down, Asterisk detects this and acts accordingly.  If I ring the
> Telewest line, the clear down is not detected, hence Asterisk continues
> to ring extentions, record voicemail, etc.
>
> I've seen a few posts reporting this issue with the UK cable system but
> these are generally not resolved.
>
> Has anyone sucessfully configured a UK Telewest line with Astersik?
> Does anyone know how Telewest signals that the remote caller has cleared
> down?
I did an instalaltion yesterday with 2 Teleworst lines.

When I was calling in on my mobile, then hanging up, it seemed to work ok 
- it did keep the line open for a few seconds, but I see that with BT too.
> On the same topic, how does BT signal remote clear down?
Dunno...
> I have plugged a phone into the Telewest line and it doesn't appear to
> receive a tone on clear down, nor does it appear to drop power on the
> line.  Just in case, I changed the DCT in zaptel.h from 500ms to 100ms and
> recompiled, however, this did not resolve the issue.
I'm using asterisk 1.2.30, Zaptel 1.2.24. Oslec and an OpenVox card.
> I'm working blind at the moment as I cannot find anything which
> documents what to expect the Telewest line to do to signal a remote
> clear down occured.  I've played around with the kewlstart and
> loop-start setting but without knowing what the line is going to do,
> it's difficult to know how to configure Asterisk.
>
> Does anyone have any experience of Telewest?
Only 2 sites and they both seem to work OK - One in Bristol the other in 
Plymouth.

Can't get caller ID to work though )-:

Zaptel.conf:

fxsks=3
fxsks=4
loadzone=uk
defaultzone=uk


zapata.conf:

usecallerid=yes
cidsignalling=v23
cidstart=polarity
hidecallerid=no
callwaiting=no
threewaycalling=yes
transfer=yes
echocancel=256
;echocancel=yes
;echotraining=yes
echocancelwhenbridged=no
immediate=no
faxdetect=no


; Channel 3: PSTN line
context=incoming
group=1
usecallerid=no
faxdetect=none
signalling=fxs_ks
rxgain=4
txgain=4
callerid=asreceived
channel => 3

; Channel 4: PSTN line
context=incoming
group=1
usecallerid=no
faxdetect=none
signalling=fxs_ks
rxgain=4
txgain=4
callerid=asreceived
channel => 4


Gordon