[comp.sys.mac.misc] switching box between unix and appletalk for printer

jjk@jupiter.astro.umd.edu (Jim Klavetter) (01/13/91)

At our site, we have a system of suns ethernetted as well as an
appletalk network.  Until now, we have been swithing between the
rs-232 serial port and appletalk manually.  Someone gave me a brief
description of a box which switches between these ports automatically,
depending on the input.  Specifically, this is what I was told:

they are now using a smart box to switch between
AppleTalk and SunSerial talking to the laserprinters.  The box is a
model 2679A BridgePort manufactured by Extended Systems and sold
through
chain wholesalers like MicroAge.  They paid less than $500.  To use it
we would also need an adapter that converts the SunSerial connector to
an 8-pin telephone-type connector (also available from Extended
Systems).
The box provides 56kb output to the printer and automatically scans
the
three input queues (AppleTalk, Serial, and Centronics Parallel).  It
does
stay on a single queue until it is idle for about 20 seconds and then
it 
resumes scanning all three queues

Does anyone know about this product?  Does anyone have any comments
concerning this product or a similar one?  

Thanks for any info.  Followup to comp.sys.mac.hardware or e-mail to
me.

jjk@astro.umd.edu also for Athabasca and Reudi
Jim Klavetter
Astronomy
UMD
College Park, MD  20742