[asterisk-users] British Telecom ISDN BRI line issues

[khalid touati]

Thank you Patrick for the detailed info, it does make perfect sense to me,
I never expected that Digium cards have such an problem!

On Thu, May 10, 2012 at 4:13 PM, Patrick Lists <
asterisk-list at puzzled.xs4all.nl> wrote:

> On 10-05-12 21:10, khalid touati wrote:
> > Hi All,
> > I did downgrade to asterisk 1.6.2.6 and dahdi 2.3 which is working with
> > other BRI line (in our NL office), but I get this type of errores:
> >
> >     -- Called G1/0788744550
> > [May 10 20:07:20] ERROR[27479]: chan_dahdi.c:12280 dahdi_pri_error: ACK
> > received for '1' outside of window of '0' to '0', restarting
> >   == Primary D-Channel on span 3 down
> > [May 10 20:07:20] WARNING[27479]: chan_dahdi.c:4158 pri_find_dchan: No
> > D-channels available!  Using Primary channel 9 as D-channel anyway!
> >   == Primary D-Channel on span 3 up
> > [May 10 20:07:20] ERROR[27480]: chan_dahdi.c:12280 dahdi_pri_error:
> > Huh!? no master found
> >
> > I didn't change my config in my previous post, anyone familiar with this
> > type of errors?
>
> No but there is a bug report with a lot of information that seems
> similar: https://issues.asterisk.org/jira/browse/14031
>
> In Europe telco's drop the D-channel (cut off power) to save on the
> electric bill. The libpri/dahdi/asterisk combo should detect a dropped
> D-channel and signal the telco to fire up the D-channel. Judging from
> that bugreport ("Unresolved") it seems Digium has still not succeeded in
> properly handling this situation.
>
> Should you not be able to resolve this issue and really require an ISDN
> BRI connection then have a look at an Eicon Diva or Sangoma card. Both
> cards+drivers properly handle a dropped D-channel. I have used Eicon
> Diva and Sangoma BRI cards in the Netherlands and they work fine. Or you
> could get a blackbox from Beronet, Patton, Audiocodes etc. If you feel
> adventurous you can also get a BRI card with a HFC-S Cologne chipset and
> get the latest and greatest isdn4k-utils, mISDN, mISDNuser and lcr from
> http://misdn.eu, build, install and configure lcr to talk to asterisk. A
> few weeks ago I set it up and did one test call and that call worked
> fine. Use at own risk :)
>
> Regards,
> Patrick
>
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-- 
Khalid Touati
Network Administrator at Endosoft, LLC
CCNA
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