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

[Kelvin Chua]

I should clarify on my post, i can see a red alarm on cat /proc/dahdi/1 but
never when using dahdi_tool

in cat /proc/dahdi/1:
Span 1: WCTDM/4 "Wildcard TDM400P REV E/F Board 5" (MASTER)

   1 WCTDM/4/0 FXSKS (In use) RED(SWEC: OSLEC)
   2 WCTDM/4/1 FXSKS (In use) RED(SWEC: OSLEC)
   3 WCTDM/4/2 FXSKS (In use) RED(SWEC: OSLEC)
   4 WCTDM/4/3 FXSKS (In use) RED(SWEC: OSLEC)

In dahdi_tool:
Tx/Rx Levels:         0/  0
Total/Conf/Act:       4/  4/  0

but the behavior status alarm is OK
a little bit misleading, what i am thinking is adding a sort of "yellow"
alarm or something if one of the configured fxo lines
goes down?

another thing, what if 1 of the configured lines' battery is up, but there
is no dial tone? outbound calls will try to go through
and the caller will hear dead air.

Kelvin Chua


On Fri, Aug 26, 2011 at 9:01 AM, Shaun Ruffell <sruffell at digium.com> wrote:

> 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
>
> --
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