[comp.dcom.telecom] Identifying Switches

hwt@uunet.uu.net (Henry Troup) (06/15/90)

In article <8903@accuvax.nwu.edu> DREUBEN@eagle.wesleyan.edu) (DOUGLAS
SCOTT REUBEN) writes:

>I still can't tell what sort of electronic switch it is just by
>hearing the busy/ring signals (ie, to distinguish between a DMS-100
>and 200, for example), 

That's because the DMS-100 and 200 use the same tone generators, etc.
The product line includes 100, 100/200 combined, 200, and access
tandem.  (Plus DMS-250, 300, and MTX).  100 is local, 200 is toll,
essentially. I've never been totally clear on the _hardware_
difference between a 100 and a 200.  I don't think there is any.

Each of the above products is available with two generations of CPU -
NT40 and SuperNode (tm), a 68020/30/40 version.  Then there are the
peripherals - the original series, probably not supported on
SuperNode, and the XPM series, themselves 68020 based, on both NT-40
and SuperNode.

Watch the press for more announcements that will complicate this even
more!


Henry Troup - BNR owns but does not share my opinions
 ..uunet!bnrgate!hwt%bwdlh490 or  HWT@BNR.CA