[Asterisk-Users] Problem with T1 PRI line resetting/droppingcalls.

[Bruce Komito]

I'm the one who posted the original question, and yes, I *am* experiencing
dropped calls.  I haven't yet been able to correlate the dropped calls
with anything, and that is why I asked the question about the PRI warnings
and notices.  Also, our volume of calls is very light...maybe 3-4
calls/hour.  But, the dropped calls are very frequent and
predictable...predictable in the sense that if you plan to talk for more
than 5 minutes, there is a high likelyhood your call will be dropped.

We are running on a relatively small system...700mz celeron, 128mb, slow
disks, and a bios that tends to like to put as much as possible on the
same IRQ.  So, I am hoping the messages, and the solution to our problem
with dropped calls has to do with a shortage of resources.  We plan to
upgrade the system to a 3gz P4 in the next few days, and I will post the
results of that upgrade when I determine if the problem goes away.

Bruce Komito
High Sierra Networks, Inc.
www.servers-r-us.com
(775) 236-5815


On Fri, 4 Jun 2004, Gary Franczyk wrote:

> I don't think the question you answered is the same as the one I asked.  The
> problem with mine is the dropping of all the lines/calls.   It resets all
> the lines.
>
> I get those mystery notices on occasion also, but they don't drop all the
> lines until I see the "Detected Alarm" messages for each line.
>
> I just signed up for this list, so I might have missed your post.  Did the
> person you were answering see the same problem that I do:  Dropping of all
> the lines?
>
> Thanks
>
>
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Eric Wieling
> Sent: Friday, June 04, 2004 2:00 PM
> To: asterisk-users at lists.digium.com
> Subject: Re: [Asterisk-Users] Problem with T1 PRI line
> resetting/droppingcalls.
>
>
> On Fri, 2004-06-04 at 12:09, Gary Franczyk wrote:
> > I am having a serious problem with my Asterisk system.  Every few days, my
> > PRI line resets and drops all calls.  I get these errors in the messages
> > log:
> >
> > Jun  3 02:41:11 WARNING[11276]: PRI: Read on 39 failed: Unknown error 500
> > Jun  3 02:41:11 NOTICE[11276]: PRI got event: 6 on span 1
> > Jun  3 02:41:11 WARNING[12301]: Detected alarm on channel 1: Red Alarm
>
> I answered this same question *today*:
>
>
>
>      From:
> Eric Wieling <eric at fnords.org>
>  Reply-To:
> eric at fnords.org
>        To:
> asterisk-users at lists.digium.com
>   Subject:
> Re: [Asterisk-Users] Mystery PRI NOTICEs & WARNINGs
>      Date:
> Fri, 04 Jun 2004 10:53:42 -0500
>
> On Fri, 2004-06-04 at 09:07, Bruce Komito wrote:
> > Since connecting a PRI to a Digium T100P, I have been seeing the
> > following messages in syslog every few minutes:
> >
> > Jun  4 06:51:54 pbx asterisk[13435]: WARNING[1209214400]: chan_zap.c:6176
> in zt_pri_error: PRI: Read on 56 failed: Unknown error 500
> > Jun  4 06:51:54 pbx asterisk[13435]: NOTICE[1209214400]: chan_zap.c:6913
> in pri_dchannel: PRI got event: 8 on span 1
>
> The new Zaptel has the "zttest" program, which will tell you if
> interrupts are being locked for too long.  This can cause the Error 500
> messages you are seeing.  Causes of interrupts being locked for too long
> can be: graphics, frame buffer, IDE DMA.  There might be other things
> that cause this error, I don't know.
>
>
> --
>           Eric Wieling * BTEL Consulting * 504-899-1387 x2111
> "In a related story, the IRS has recently ruled that the cost of Windows
> upgrades can NOT be deducted as a gambling loss."
>
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