[comp.dcom.modems] Modems with constant serial speed to terminal

cherry@mgh-coffee.uucp (Mike Cherry) (02/23/89)

I'm looking for a modem that will maintain a constant baud rate to the
terminal regardless of the speed used to connect with the remote.  I am
using a DecServer 200 to reach my modems.  The DecServer will not let me
change a ports output speed, so the modem sees a constant speed from the
terminal.  Changing the output speed in VMS has no effect.  I need to
connect with a modem which uses a lower baud rate than the terminal to
modem connection is running.  I believe I need a modem that will not
change its output to terminal baud rate while maintaining a lower baud
rate connection to a remote.

Anyone know of such a modem?

Thanks for any info,
J. Michael Cherry     Computer Systems and Applications Manager
                      Department of Molecular Biology, Wellman 901A
		      Massachusetts General Hospital,  Boston, MA 02114
		      (office) 617-726-5955     (TeleFAX) 617-726-6893
                      cherry@mgh-coffee.harvard.EDU
		      cherry%mgh-coffee@husc6.BITNET
J. Michael Cherry     Systems Analyst/Manager    &    Molecular Modelling
Department of Molecular Biology, Wellman 9, Massachusetts General Hospital
Boston, MA 02114      (office) 617-726-5955     (TeleFAX) 617-726-6893
cherry@mgh-coffee.harvard.EDU          cherry%mgh-coffee@husc6.BITNET

rsmith@vms.macc.wisc.edu (Rusty Smith, MACC) (02/23/89)

In article <1242@husc6.harvard.edu>, cherry@mgh-coffee.uucp (Mike Cherry) writes...

> 
>I'm looking for a modem that will maintain a constant baud rate to the
>terminal regardless of the speed used to connect with the remote.  I am
>using a DecServer 200 to reach my modems.  The DecServer will not let me
>change a ports output speed, so the modem sees a constant speed from the
>terminal.  Changing the output speed in VMS has no effect.  I need to
>connect with a modem which uses a lower baud rate than the terminal to
>modem connection is running.  I believe I need a modem that will not
>change its output to terminal baud rate while maintaining a lower baud
>rate connection to a remote.
> 
>Anyone know of such a modem?
> 
>Thanks for any info,
>J. Michael Cherry     

We are currently using the Multi-Tech 224ER rack mounted modems. They 
have a feature called 'baud adjust'. This allows us to have our Vax 
8650 ports set at 9600 baud and the modem serial port is also 9600.
The modem baud rate always adjusts to the originating modem. This way
users from 300 baud to 2400 baud with data compression  can call the
same number. The modem does buffering, flow control, etc. I've got
about 70+ of these on line. They are very reliable and flexible.
They also make a stand alone model. University cost is about $400.00.

Rusty Smith			Internet:  rsmith@vms.macc.wisc.edu
MACC Data Communications	Bitnet:    rsmith@wiscmacc
(608)  263-6307			Univ. of Wisconsin @ Madison

map@LCS.MIT.EDU (Michael A. Patton) (02/25/89)

I tried to send this reply to Mike Cherry directly, but his retrun
address "mgh-coffee!cherry@husc6.harvard.edu" doesn't work (husc6
doesn't know who mgh-coffee is).
	-------------------

There are a lot of modems that will let you set them up this way.
Most modern (well-designed, last 5 years) modems have this feature.
The specific modems we use that do this are USRobotics Courier 9600HST
modems, I'm pretty sure the rest of the Courier line does it too.

	    __
  /|  /|  /|  \		Michael A. Patton, Network Manager
 / | / | /_|__/		Laboratory for Computer Science
/  |/  |/  |atton	Massachusetts Institute of Technology

Disclaimer: The opinions expressed above are a figment of the phosphor
on your screen and do not represent the views of MIT, LCS, or MAP. :-)