Path: utzoo!attcan!uunet!cs.utexas.edu!rutgers!elbereth.rutgers.edu!ron.rutgers.edu!ron
From: ron@ron.rutgers.edu (Ron Natalie)
Newsgroups: comp.dcom.lans
Subject: Re: CISCO terminal server users, please help
Message-ID: <May.26.13.18.36.1989.214@ron.rutgers.edu>
Date: 26 May 89 17:18:39 GMT
References: <5137@charon.unm.edu>
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 17

> I am about to use a CISCO terminal server in a new application - to front
> and a group of bit rate agile modems.  I would appreciate hearing good and
> bad comments regarding CISCO's support of this type of capability.

If you're talking about synchronous ports, there is no problem.
The Cisco will follow the clock rate from disgustingly slow up
to (and beyond presumably) T1.  If you're talking async modems
with some sort of fall back, no computer or terminal server can
deal with this unless you give it some external indication of the
speed changing.  The typical way of handling slick modems that
have variable effective transfer speeds is to just set the rs-232
port to a high speed and use some flow control to handle the
speed mismatch.  Cisco can do flow control on either on one of
the RS-232 spare pins or with XON/XOFF.  It's configurable per
port.

-Ron