[Asterisk-Users] Random Dropped Called

[Bruce Komito]

Run zttool and see if you the T1 card is missing interrupts.  If so, put
the following statement in your rc.local :

# unmask interrupts
/sbin/hdparm -u1 /dev/hda

This will tell the ide driver not to mask interrupts while servicing disk
i/o and the missing interrupts on your T1 card will likely go away.

If this isn't the problem, zttool might still give you a hint if there are
problems on the PRI itself.

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


On Tue, 20 Jul 2004, Paul Oster wrote:

> I've got a 4 port T1 card in my Asterisk box with a PRI from Qwest as
> my PSTN interface.  I'm experiencing random dropped calls on the
> various SIP devices I have tested.  Network connectivity to the SIP
> devices looks ok, and I have tried a variety of the devices including
> all of the following.
>
> Grandstream 286
> Grandstresm 486
> Sipura SPA 1000
> Mediatrix 2102
>
> Some example lines from my logs which may indicate a problem
>
> Jul 15 15:32:41 WARNING[11276]: PRI: !! Got reject for frame 30,
> retransmitting frame 30 now, updating n_r!
> Jul 15 17:03:20 WARNING[11276]: PRI: !! Got reject for frame 95, but
> we only have others!
> Jul 15 17:07:44 WARNING[11276]: PRI: !! Got reject for frame 124,
> retransmitting frame 124 now, updating n_r!
> Jul 15 17:07:44 WARNING[11276]: PRI: !! Got reject for frame 124,
> retransmitting frame 125 now, updating n_r!
> Jul 15 17:11:56 WARNING[11276]: PRI: Read on 66 failed: Unknown error 500
> Jul 15 23:08:37 WARNING[5126]: Maximum retries exceeded on call
> c36ae135242165c3 at XXX.XXX.XX.XX for seqno 30406 (Response)
> Jul 16 05:39:08 NOTICE[11276]: PRI got event: 8 on span 1
> Jul 16 06:25:04 NOTICE[5126]: Request to schedule in the past?!?!
> Jul 17 14:43:43 WARNING[11276]: Ring requested on channel 1 already in
> use on span 1.  Hanging up owner.
>
> This issue has had me baning my head on my desk for weeks, any
> information that you may have that could clear this up will be much
> appreciated.
>
> --Paul M. Oster
> paulmoster at gmail.com
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