[asterisk-users] Disappearing B-Channels

[Mark Greene]

Kevin,

Let's compare. Right now I am restarting asterisk when convenient every
hour, and that's keeping the symptoms at bay. However if I let the problem
get to the point that it won't take ANY incoming / outgoing calls then I
cannot even initiate a restart from the CLI. I have to back all the way out
of the CLI to the system prompt and actually call the init script to restart
the asterisk service itself. Is this similar for you?

What is your system?

I am running

Dell Poweredge
P4 2.8 Ghz
512 MB RAM
80 GB HDD on Software RAID 1

CentOS 5
Kernel 2.6.18-53.1.4.el5
i686

Asterisk 1.4.18
Zaptel 1.4.8
Libpri 1.4.3
asterisk-addons 1.4.5

On Feb 10, 2008 5:06 PM, Kevin Kiely <Asterisk at gtcus.com> wrote:

>  Mark,
>
>
>
> I thought I would also mention that I am still having similar issues even
> after updating to the latest Asterisk, Zaptel and Libpri.  Although I am
> using a Sangoma, we have similar symptoms with a restart fixing it. I am
> starting to wonder if I must go back to a Digium card.  We originally  switched
> away from the Digium TE110 because of interrupt issues, I think that the
> interrupt issue has been remedied now.
>
>
>  ------------------------------
>
> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *Mark Greene
> *Sent:* Sunday, February 10, 2008 11:15 AM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> *Subject:* Re: [asterisk-users] Disappearing B-Channels
>
>
>
> I don't think it's my telco, I think it's my TDMoE setup. Does that sound
> possible?
>
> I've never had problems with the circuit until I moved it from a standard
> digium PRI card to a TDMoE device.
>
> Also, if I restart asterisk, all the b-channels come back.
>
> Thoughts?
>
> On Feb 10, 2008 9:40 AM, Tilghman Lesher <
> tilghman at mail.jeffandtilghman.com> wrote:
>
> On Sunday 10 February 2008 01:44:38 Mark Greene wrote:
> > In my efforts to solve a mystery of asterisk slowly loosing it's ability
> to
> > take incoming and outgoing calls I set asterisk to restart b-channels
> every
> > 60 seconds hoping I would find something odd after some time.
> >
> > So now I am looking at the CLI a few hours later and look what happens
> when
> > asterisk restarts the 23 b-channels I have.
> >
> > pbx1*CLI>
> >     -- B-channel 0/19 successfully restarted on span 1
> >     -- B-channel 0/21 successfully restarted on span 1
> >   == Primary D-Channel on span 1 down
> > [Feb 10 01:41:23] WARNING[4102]: chan_zap.c:2401 pri_find_dchan: No
> > D-channels available!  Using Primary channel 24 as D-channel anyway!
> > [Feb 10 01:41:24] ERROR[4102]: chan_zap.c:8200 zt_pri_error: !! Got
> S-frame
> > while link down
> >   == Primary D-Channel on span 1 up
> >     -- B-channel 0/19 successfully restarted on span 1
> >     -- B-channel 0/21 successfully restarted on span 1
> >     -- B-channel 0/23 successfully restarted on span 1
> > pbx1*CLI>
> >
> >
> > That's the output while I've been writing this email. Those are TWO
> > restarts of the b-channels. Notice I am missing a seizable amount of my
> 23
> > b-channels.
> >
> > Where are they going?! How do I find out?
> >
> > I've recompiled my asterisk, zaptel, and libpri to the most recent
> versions
> > but that's made no difference.
>
> You probably have noise on your T1 circuit, which is causing the PRI
> signalling to become corrupt.  If this continues, expect that the T1
> circuit
> will go down from time to time, for a few seconds each time.  Your
> solution is
> to call your telco and ask for a loopback test.
>
> --
> Tilghman
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.516 / Virus Database: 269.20.0/1268 - Release Date: 2/9/2008
> 11:54 AM
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20080210/b3529bde/attachment.htm