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

Eric Wieling eric at fnords.org
Fri Jun 4 10:59:49 MST 2004

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*:

Eric Wieling <eric at fnords.org>
eric at fnords.org
asterisk-users at lists.digium.com
Re: [Asterisk-Users] Mystery PRI NOTICEs & WARNINGs
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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