Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request
From: Miguel_Cruz@um.cc.umich.edu
Newsgroups: comp.dcom.telecom
Subject: Re: Data Over Voice
Message-ID: <2022@accuvax.nwu.edu>
Date: 10 Dec 89 22:59:12 GMT
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X-Telecom-Digest: Volume 9, Issue 566, message 9 of 10

A little while ago, Richard Steele wrote:

 >Here at Purdue U., we now have access to something called data over
 >voice (DOV) units.  These are small boxes, about the size of a regular
 >modem, that gives the user a 9600 bps asynchronous data line to the
 >University computer.  Not only is the bugger faster than a modem, _but
 >it leaves the phone free for regular use_.
 
In response to which Steve Elias wrote:

 > I think there are some nifty boxes out there which will encode the
 > voice digitally and use any excess digital bandwidth for other data.
 > Maybe this is the sort of device Purdue has given you.
 
Actually, I'd think it much more likely that there are just extra
pairs running from all the university phone jacks that are activated
on request and connected to the "University computer".
 
Here at the University of Michigan (which I tend to assume works
exactly the same as everyplace else), they will supply dorm residents
with line drivers for a hundred bucks a year.  Sometimes they refer to
them as "data over voice" or other similarly deceptive hi-tech terms,
but there's nothing magical about it.
 
They work at 19200 baud and connect through Secondary Communications
Processors (whatever they are) located in various campus buildings.  I
don't even think they're switched by the campus PBX...just wired
straight.