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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!udel!haven!uvaarpa!mcnc!ecsvax.uncecs.edu!dukeac!klg
From: klg@dukeac.UUCP (Kim Greer)
Newsgroups: comp.dcom.lans,comp.dcom.modems
Subject: Re: multiplexing serial lines
Keywords: PC/NOS
Message-ID: <1607@dukeac.UUCP>
Date: 19 Oct 89 10:50:34 GMT
References: <8091@microsoft.UUCP>
Reply-To: klg@dukeac.UUCP (Kim Greer)
Followup-To: comp.dcom.lans
Distribution: usa
Organization: Academic Computing, Duke University, Durham, NC
Lines: 28

In article <8091@microsoft.UUCP> bruceki@microsoft.UUCP (Bruce King) writes:
>
>  I don't know if this product exists, but I'd like to know.  In particular,
>I'd like to run 4 serial lines (300-1200 baud lines) into a black box, and
>run a single line out of it to a high speed modem.  When I get to where I'm
>going, I want to do the opposite.  
>
>  ------300 baud line-----\                       /---300 baud line----
>  ------1200 baud line-----\_X__telebit modem__X_/----1200 baud line---
>  ------300 baud line------/                     \----300 baud line----
>  ------1200 baud line----/                       \----1200 baud line--
>
>What I'm asking about is "X" in the above picture.  I could probably work
>something out with a PC and a multiport card and some software, but I'd rather
>buy a product off the shelf.  

  Since you wanted a "black box", call Black Box Corp.  Looking through their
catalog, I see a number of multiplexors, several of which might fill your needs.
I have had a few dealings with them, and they seem to be pretty reliable.
From the catalog (Jan 89):
	"FREE Technical Support - the Black Box Difference
	 Call (412) 746-5565 Monday-Friday, 8:00 A.M. - 8:00 P.M.
	 or FAX you questions: (412) 746-0746"

  Its worth getting the catalog just for the Technical Reference and Glossary
sections in the back (seems like these sections used to be a lot bigger).