[Asterisk-Users] line battery check

[Scott Stingel]

Hi-

Its not clear from your msg whether you want to detect the open-circuit
condition of  the T1/E1 directly or on one of the analog circuits connected
on the other side of the channel bank.

If directly on the E1/T1, I imagine that asterisk can detect the condition
of the "alarm" signals for the circuit - these are separate from the
signalling supervision bits like on/off hook.  I'm new to asterisk, so don't
know how to read those alarm indicators in the software, but the ones you
are probably interested in are: "Red Alarm" - means loss of signal (I think
a cut line would cause this), "Yellow alarm" - means far end detected an
error, and "BPV" - bi-polar violation, means degraded signal (usually).

Hope this helps.

regards

Scott M. Stingel 
Emerging Voice Technology Inc.

Email:          scott at evtmedia.com <mailto:scott at evtmedia.com>   
URL:            www.evtmedia.com <http://www.evtmedia.com>   



> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> Jon Pounder
> Sent: Tuesday, July 08, 2003 4:29 PM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] line battery check
> 
> 
> I know in the x100p hardware the driver can sense whether 
> there is battery 
> voltage on the line or not. Is this possible in the zap 
> drivers using t1/e1 
> interfaces ?
> 
> I believe the signalling bits are only ring and hook, not 
> loop presence, so 
> not sure if it is possible.
> 
> I had a situation last night where a main cable was cut in 
> the area and 
> lines were down overnight. My burglar alarm knew right away 
> there was no 
> line battery and started beeping. Data T1 down was a 
> no-brainer for the 
> monitoring software to detect. Now I am looking for a way to 
> detect loop 
> loss on the voice lines - any ideas how to accomplish with asterisk ?
> 
> I have a zhone bank - anyone know offhand if I can program 
> loop loss on a 
> port to put it into an alarm state ? At least then I would 
> have a contact 
> closure I could monitor easily.
> 
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