[asterisk-users] red alarm on tdm400 fxo (fxs signalled)

[Shaun Ruffell]

On Fri, Aug 26, 2011 at 08:51:56AM +0800, Kelvin Chua wrote:
> has anybody ever seen a red alarm on an fxo port (tdm400) whenever you
> unplug a pstn line? I think i saw a post on the mailing list a few years
> back about this, but never actually seen one

I've not personally tested this, but I did look in the source and it
appears that this should be the behavior.  Line 984 of
drivers/dahdi/wctdm.c [1] in the current trunk of dahdi-linux will
set the red alarm when battery is lost which can indicate that the
port is unplugged from the PSTN.

[1] http://svnview.digium.com/svn/dahdi/linux/trunk/drivers/dahdi/wctdm.c

Are you not seeing this behavior?

Cheers,
Shaun

-- 
Shaun Ruffell
Digium, Inc. | Linux Kernel Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: www.digium.com & www.asterisk.org