[asterisk-dev] Zaptel LOS threshold

[Alex Balashov]

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