[asterisk-dev] Zaptel LOS threshold

[Butler, Larry]

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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