[Asterisk-Users] TE410P ERRORS under load

[Mark Spencer]

I've made some updates that may help alleviate these problems on TE410P on
E1.  I'd like you to test and tell me if that helps.  Also, I'd like you
to confirm that you are using neither serial console nor frame buffer
(graphical) console.

Mark

On Thu, 20 Nov 2003, Scott Stingel wrote:

> Hi all-
>
> HELP!
>
> This is actually a revisit of a problem that I had earlier with E400P's at a
> customer site.  Customer still gets locked up channel problem, but has
> learned to live with it  (channels clear themselves after several minutes).
> The symptoms, which I  believe are directly related:
>
> I'm having problems with tons of framing and "read" errors on my E1
> connections (and occasional stuck channels) when I run a very simple IVR
> script under anything other than light load.  Previously, I had thought this
> problem related to my customer's PBX connections (Nortel DMS100), but in the
> last week I've had the opportunity to work in-house with a couple of
> TE410P's, with one span making calls to another on the same machine.
>
> I have two simple scripts running under the dialplan.  On span 1, I simply
> answer each call, play a short message, and hang up.  On span 2, I run a
> Perl script that formats and drops calls (into /var/spool/asterisk/outgoing)
> for all channels at staggered times.  These calls are simple outgoing calls
> that dial a number, wait 2 seconds, and hangup.  After a few seconds, each
> call repeats.
>
> I can run this scenario on up to 10 channels at once with *no errors*.
> Above 10 channels, I start to get many (several per second when running 30
> channels) framing and "read" errors, with text similar to the following:
>
> WARNING[1167272128]: File chan_zap.c, Line 5670 (zt_pri_error): PRI: !! Got
> reject for frame 26, retransmitting frame 26 now, up_dating n_r!
> (repeating for each error several times, with ascending retransmitted frame
> numbers)
>
> and also, less often:
> WARNING[1167272128]: File chan_zap.c, Line 5670 (zt_pri_error): PRI: Read on
> NN failed: Unknown error 500   (NN is the channel)
>
> MY SETUP:
> Tyan S2723, with dual Xeon's running at 2.4 GHz, 1MB memory
> Redhat 9
> Two TE410P's, spans set for E1.  Problem happens between spans on different
> boards, or spans on the same board.
> Sending board setup in zaptel.conf, for example:  span=2,1,0,ccs,hdb3
> (adding crc4 makes no difference)
> Recving board setup in zaptel.conf, for example:  span=1,0,0,ccs,hdb3   "  "
>
> In zapata.conf, sender is "pri_net" and receiver is "pri_cpe"
>
> QUESTIONS:
> ANYONE: Has anyone else experienced these framing problems in any scenario,
> and if so, what did you do about it please?
>
> FOR THE ISDN GURU's: What exactly does the framing error indicate?
>
> THANKS IN ADVANCE FOR HELPING ME SOLVE THIS LOAD_RELATED PROBLEM.
>
> Scott M. Stingel
> Emerging Voice Technology Inc.
> Palo Alto, California and London, England
>
> URL:            www.evtmedia.com
>
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