Xref: utzoo comp.dcom.modems:8990 comp.sys.proteon:417
Newsgroups: comp.dcom.modems,comp.sys.proteon
Path: utzoo!utgpu!news
From: eric@madhaus.utcs.utoronto.ca (Eric M. Carroll)
Subject: Datapath modems and Proteon Routers
Message-ID: <1991Mar28.201053.20100@gpu.utcs.utoronto.ca>
Sender: news@gpu.utcs.utoronto.ca (USENET)
Organization: UTCS, Network Development
Distribution: na
Date: Thu, 28 Mar 1991 20:10:53 GMT

On campus and in the Ontario Regonal Network we have had occasion to
utilize Datapath modems from NT. These are circuit switched data
modems that are of value when we cannot get leased line service
to a locale. They are also cheaper for incity connections due to
Canadian tariffs.

We usually run them permanently nailed up. From time to time, the circuit
falls over, and must be redialed. With the autoline feature, this part
is not a problem. What is a problem, is that the modems are designed to
require a DTE DTR transition before it will allow the call to succeed.
While this is fine for terminals, it is lousy for Proteons, which 
expect a leased line, and not to have to toggle DTR.

Does anyone know of a box that would provide V.35 interfaces 
and would auto-toggle the DTR when CD is lost or there is no 
activity on a line? The closest I have seen is a RS232 timeout 
box from Black Box. 

Any ideas?
--
Eric Carroll		University of Toronto Computing Services
			Network Development Support