[asterisk-dev] Zaptel LOS threshold

[William Moore]

Actually, I think the alarm handling is separate for each card.  If
you look in wcte11xp.c and search for "alarms |= ZT_ALARM_RED;", you
will find the related code.  The one posted by Alex would be only for
dynamic spans.  I found similar code in wct1xxp.c, wct4xxp/base.c, and
I assume its in the TE120 driver as well.

On 7/2/07, Butler, Larry <lbutler at intercall.com> wrote:
> Thanks Alex!  I believe this is going to be it...  Until today I have
> never really explored the Zaptel code base and needed a good kick in the
> right direction.
>
> Thanks again for the help,
>
> Larry Butler
>
> >Larry
> >
> >Sounds like the answer you seek may be in ztdynamic.c in the
> neighbourhood
> >of line 796, function check_for_red_alarm():
> >
> >         while(z) {
> >                 newalarm = z->span.alarms & ~ZT_ALARM_RED;
> >                 /* If nothing received for a second, consider that RED
> ALARM */
> >                 if ((jiffies - z->rxjif) > 1 * HZ) {
> >                         newalarm |= ZT_ALARM_RED;
> >                         if (z->span.alarms != newalarm) {
> >                                 z->span.alarms = newalarm;
> >                                 zt_alarm_notify(&z->span);
> >                                 alarmchanged++;
> >                         }
> >                 }
> >                 z = z->next;
> >         }
> >
> >
> >If I have this wrong, please, someone, correct me.  I do not actively
> >peruse this code and would hate to misinform someone.
> >
> >Thank you,
> >
> >-- Alex
> >
> >On Mon, 2 Jul 2007, Butler, Larry wrote:
> >
> >> I am trying to locate a LOS to red alarm threshold value in zaptel.
> >> Does this exist?   If not, can someone point me in the right
> direction
> >> of where to start looking to make changes?  It appears that any bit
> loss
> >> will throw the circuit into a red.  If I am reading this right, the
> >> Telcordia spec states that the circuit should survive LOS for 2.5
> >> seconds prior to declaring red alarm.
> >>
> >>
> >>
> >> Thanks,
> >>
> >>
> >>
> >> Larry Butler
> >>
> >>
> >>
> >>
> >
> >--
> >Alex Balashov
> >Evariste Systems
> >Web    : http://www.evaristesys.com/
> >Tel    : +1-678-954-0670
> >Direct : +1-678-954-0671
> >
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