Re: A Dummy question about PM3s

Stephen Fisher (lithium@cia-g.com)
Sat, 12 Apr 1997 00:55:35 -0600 (MDT)

If you bring a PRI into a PM3 each channel can be analog OR ISDN - Matthew
is saying that each channel can't be both at the same time. But the PRI
can have analog calls and ISDN calls on it at the same time and so can the
PM3. It auto-detects what kind of call is coming in and handles it
correctly.

On Fri, 11 Apr 1997, Jeff T. Carneal wrote:

> On Fri, 11 Apr 1997, Matthew S. Crocker wrote:
>
> I'm a bit confused by this description. Maybe someone with a PM3 can
> clear it up as I don't have one.
>
> > A PRI gives you 23 digital data paths which can be used for either 64k B
> > channel ISDN calls or analog modems (see below). They are completely
> > interchangable but they can't do both at the same time.
>
> Is this saying that if I had one PRI, that I couldn't do both analog and
> ISDN calls off it assuming I have digital modems?
>
> > two Channelized T1's into it for 48 digital modems, or one T1 and one PRI
> > for 47 digital modems and/or 23 ISDN B channels, *OR* 2 PRI for 46 digital
> > modesm and/or 46 ISDN B channels.
>
> Your "and/or" is also a bit confusing. Basically, my question is as I
> asked above. Can each PRI handle both ISDN or analog calls by
> determining the call type during call setup, or does one have to
> configure this PRI only for analog, and this one only for ISDN, etc...?