[Asterisk-Users] T1-PRI deployment questions...

[Steven Critchfield]

On Mon, 2003-06-02 at 12:45, John Harragin wrote:
> Thanks to everyone for all the info...
> 
> One more question. Until now, I had succesfully avoided isdn throughout my
> computer career... other than having the notion that it was a fairly
> troublesome line with data rates several times faster than pots.
> 
> So far from ACC (my pri vendor) my T1-PRI must be b8zs/esf. On the form I
> have to fill out most of the pri enteries are listed under ISDN/PRI so I'm
> not really sure which questions are particular to pri.
> 
> My usage will 23 voice (with an occational fax) plus the d channel. What is
> the relationship between pri & isdn - is it considered isdn? If so, what do
> I need to know about that?

BRI is ISDN with 2 64K B channels and a 16K D channel.

PRI is ISDN with 23 64K B channels and a 64K D channel.

B channels carry the data or voice, and D channels are used in call
setup, monitoring, teardown, and any other config/signalling.

-- 
Steven Critchfield  <critch at basesys.com>