[Asterisk-Users] Nasty little incident ...
Rich Adamson
radamson at routers.com
Thu Jun 16 06:23:37 MST 2005
Doubtful its a clocking issue; the clock is actually on the E1 card
and it obtains "sync" from whichever card you specify. The total lack
of sync will not cause a total failure of the card as described.
The OP did not mention whether the asterisk system was rebooted after
disconnecting the meridian, so I don't believe one can _assume_ the
channel numbers didn't change.
------------------------
> Exactly what I was about to say Steve. The numbers won't change. They are configured when the
driver actually detects the
> E1 card and it's spans. If a span goes down it doesn't disappear. Turning off the meridian
would be the same as an E1 that's
> connected to a carrier going down. If the channel numbers changed and everything stopped
working every time that happened,
> no one would be using asterisk. Our carrier friends are hardly 100% reliable.
>
> I'm going with clock source. I have a feeling that it was using span 4 for clocking and when
it lost that, it broke everything...
>
> Jamie
>
> On Wed, 2005-06-15 at 21:32 +0100, Steve Hanselman wrote:
>
> I doubt they do, if they are marked as being there, but happen to be down then the numbers
would stay the same.
> Sounds more likely that something happened with the clock source.
>
> You'd need to reproduce it out of hours and look at the output of pri show span x and cat
/proc/zaptel/*
>
>
> ________________________________
>
> From: asterisk-users-bounces at lists.digium.com on behalf of Rich Adamson
> Sent: Wed 15/06/2005 5:01
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Nasty little incident ...
>
> > >>We have a te410p, with the following connections:
> > >>
> > >>span 1 connected to a 32 Channel EuroISDN
> > >>span 2 connected to a card in a legacy pbx (Meridian)
> > >>span 3 connected to a 10 Channel EuroISDN
> > >>span 4 connected to a card in a legacy pbx (Meridian)
> > >>
> > >>We have no need for the meridian now, and decided to turn it off. I did
> > >>not change the zaptel.conf settings, nor the zapata.conf settings.
> > >>
> > >>When the meridian was turned off, * would no longer allow any outbound
> > >>or inbound calls through spans 1 and 3 (although these are connected to
> > >>the pstn). When I turned the meridian back on - in a hurry I might add
> > >>;) (had no time to play with configurations) and restarted *, then
> > >>everything was ok again ...
> > >>
> > >>Should I comment out span 2 and 4, run a ztcfg, unplug the cables in 2
> > >>and 4, and then turn off the meridian ?
> > >>
> > >>Julian.
> > >>
> > >>/* zaptel.conf */
> > >>
> > >>span=1,1,0,ccs,hdb3,crc4
> > >>bchan=1-15,17-31
> > >>dchan=16
> > >>
> > >>span=2,0,0,ccs,hdb3,crc4
> > >>bchan=32-46,48-62
> > >>dchan=47
> > >>
> > >>span=3,2,0,ccs,hdb3,crc4
> > >>bchan=63-77,79-93
> > >>dchan=78
> > >>
> > >>span=4,0,0,ccs,hdb3,crc4
> > >>bchan=94-108,110-124
> > >>dchan=109
> > >>
> > >>loadzone=uk
> > >>defaultzone=uk
> > >>
> > >>
> > >
> > >Just a wild guess....
> > >
> > >When the two meridian links disappeared, the channel numbers
> > >probably changed. Instead of channels 1 through 124, you probably
> > >have channels 1 through 62 and your supporting dialplan (and other
> > >channel specific items) likely don't match.
> > >
> > >
> >
> > I thought that the definitions in the zaptel.conf and zapata.conf (see
> > below) defined the channel numbers, not the physical channels themselves
> > ? I use Dial(zap/g3) to call on the zap channels.
> >
> > /* zapata.conf */
> >
> > context=isdn32-b
> > prilocaldialplan=national
> > internationalprefix = 00
> > nationalprefix = 0
> > localprefix = 01702
> > group=1
> > signalling=pri_cpe
> > switchtype=euroisdn
> > channel=1-15,17-31
> >
> > context=meridian-b
> > group=2
> > signalling=pri_net
> > switchtype=euroisdn
> > channel=32-46,48-62
> >
> > context=isdn32-a
> > pridialplan=unknown
> > group=3
> > signalling=pri_cpe
> > switchtype=euroisdn
> > channel=63-77,79-93
> >
> > context=meridian-a
> > group=4
> > signalling=pri_net
> > switchtype=euroisdn
> > channel=94-108,110-124
>
> I'm sure there are others on this list that can add to this, but
> when the card drivers are loaded and ztfg run, the channels that
> are discovered have to be mapped to what's in zaptel.conf one way or
> another. (Moving card driver load around changes the discovered
> order and one must manually modify zaptel.conf to match.)
>
> Then each zap channel is defined in zapata.conf, and those definitions
> have to match the channel numbers resulting from the above zaptel.conf
> stuff.
>
> So, what happens when two E1s disappear? Do the avaiable channel
> numbers change at the zaptel.conf level? My best guess is they do,
> but I don't have E1s around to play with to prove it. So, that's
> my best guess and it certainly can be an incorrect guess on my
> part.
>
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> --
> Jamie Carl <jamie.carl at achievecorp.com.au>
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