[mod.computers.vax] VAX to PBX options

GEOFFRIL@UNION.BITNET.UUCP (02/25/87)

Later this year, we will move our VAX computers to a new building
which is some distance from our Siemens PBX switch which doubles
as the port selector.
 
Because the switch is now adjacent to the computers, we've used
individual twisted pairs to connect each port to the switch.  This
option will prove rather cumbersome when we will have to pull 100+
lines across campus.
 
We'd like to employ a T1 interconnect to carry multiplexed lines
from the switch to the VAX.  DEC has one such product, the CPI32,
but our consultants tell us that the CPI standard used in this
board is unique to Northern Telecom and unuasable on anyone else's
telephone equipment.  Siemens and AT&T both employ the DMF substandard
of T1.  I strongly doubt that this has any correspondence to DEC's
DMF-32 product.
 
Does anyone out there know of products that provide the DMF interconnect.
Ideally, we'd like to use one T1 line from the switch to a UNIBUS board
to replace 20 or more individual phone lines.
 
Thanks.
 
Leo Geoffrion                   GEOFFRIL@UNION.BITNET
Computer Center                 (518) 584-5000   EXT. 2628
Skidmore College
Saratoga Springs, NY  12866