Detected alarm on channel 24: Yellow Alarm

11.5.1.9. Detected alarm on channel 24: Yellow Alarm

Jan 11 08:10:58 WARNING[11302]: chan_zap.c:6315 handle_init_event: Detected alarm on channel 24: Yellow Alarm

1) Introduction:

When configured for a pri line, yellow alarm will be set on this pri when no channels are open. (e.g. when zaptel is loaded, but asterisk is not yet running, the the remote pri card will know no channels are open and might send it to another pri, without having to try first).

If you receive the message on a PRI, that means the other end set this alarm. (or something else is wrong, and asterisk wrongly thinks its a yellow alarm).

2) Possible problems:

We have seen one broken te110p that kept flooding the CLI with alternating messages such as:

Jan 11 08:10:58 WARNING[11302]: chan_zap.c:6315 handle_init_event: Detected alarm on channel 24: Yellow Alarm
Jan 11 08:10:58 WARNING[11302]: chan_zap.c:1432 zt_disable_ec: Unable to disable echo cancellation on channel 24

Note that in this case the alarms never cleared!!!

3) Solutions:

The only solution was to replace it with another card, that fixed everything.

If you experience this warning, but the problem or solution is not as described above, please leave a comment with your problem or solution so that we can add it here.

4) References:

PRI tutorial on asteriskguru

User Comments

Moussa NDIAYE (msyndiaye at hotmail dot com)
05 February 2008 16:14:37
Hello.
I dont think if the problem is the card.

I have 4 TE410P here and i work with two providers.

With 4 E1 lines for the 1st provider every thing is Ok.

but with the second, i always have those warning and notice.

If i plug the line to the 1st telco all is ok, but the line of the second doesnt work anywhere in all my card spans.

It should be a problem in this telco.

Cannot fix this problem ever since

pckumaran (pckumaran at yahoo dot com)
23 November 2006 10:44:04
In reference to the above comment- yellow alarm problem with Asterisk server- The problem got solved when the PRI line was put down and restarted by the service provider, at their end.

pckumaran (pckumaran at yahoo dot com)
23 November 2006 09:37:06
Facing similar Yellow Alarm Problem- the clearing Yellow Alarm process does not end and the whole system hangs up disabling logging into the linux system- any solutions - please let me know.

tron (asterisk dot tron at gmail dot com)
01 February 2006 13:48:26
We got this problem and We have changed TE110P Card. We have a TE110P, TDM400P, NO IRQ shared, kernel 2.6.14, asterisk release 1.0.10, but sometimes we have same problem and all comumunications go down.

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