[asterisk-users] PRI auto-configure - continued from DEV list

[Bill Michaelson]

On Tue, Sep 9, 2008 at 7:17 AM, Bill Michaelson <bill at cosi.com> wrote:

> > I'm faced with an installation at a client site with supposed PRI service on
> > a fractional T1.  
Steve Totaro wrote:

I usually configure the entire span of 24 channels (23 B + 1 D) and
only the turned up channels go into service.  This is good for a
couple of reasons.

1.  No configuration changes are needed if the client decides to
"light up" some more B channels
2.  All B channels that are lit up will come up but not the B chans
that are not in service, so configuring the entire span in Asterisk
will not effect anything negatively.  Channels that do not come up are
not used by Asterisk.

I have had issues with this only once, the entire span came up, not
just what was provisioned, so calls going out on those channels did
not work.  The carrier put a Cisco box at the demarc that was
configured for a full PRI going to the Asterisk box.

-------------------------
Steve,

Thanks, I like this idea, and I appreciate the tip.  I will try it.  Meanwhile, I'm finding from others' comments that it is extremely common to find the D channel on 24, which is primarily what concerned me - and my inability to divine this precisely in my case led to my suggestion/inquiry on the dev list.  I've seen enough docs that indicate that the D channel could be anywhere in the group, also implying that it's not unlikely to be at 13 or 6, IIRC.  I have visions of sitting in a lonely room repeatedly editing zaptel/zapata.conf and smacking it again, and again...

Of course, due to my inability to assure everything else in the configuration is correct, I could do all that smacking for nothing. I want to eliminate variables or otherwise devise a logical step-by-step procedure for getting this running.

In my case, I've got an Adtran TSU120e doing a split between the old Nortel PBX (which I'm trying to replace) and a Cisco router for the IP side of the service.  From fiddling around with the Adtran panel, I've been able to determine that there are 12 channels being sent to the DSX-1, but it tells me no more than that.  If I could safely assume that D is on 24, and configuring the other 23 per your suggestion will be OK, maybe there is hope.



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