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midrange.com
Hi All,
David,
With ASCII terminals you can set up the speed between AS/400 and modem to
38400 bps. and 19200 bps with Client/Access.
The way to maintain fixed the speed between the ASCII port and Modem is
seting up the parameters with a PC terminal software, sendig AT commands to
the modem. Windows Terminal program works well, as almost all the PC
communications programs.
a) Conect the modem to the PC.
b) Setup the port in the communications software as well as the speed that
you need the modem get fixed (19.2 Kbps for C/A)
c) Type the AT Commands.
AT&B1 On USR this command fix the speed of the port
ATS0=1 ' ' ' ' enables autoanswer at the first ring
AT&W ' ' ' ' Writes the configuration to the modem Non
Volatile RAM (NVRAM)
d) Connect the modem to the ASCII port and
e) Setup the speed of the device description to the fixed speed instead of
*CALC
For ASCII terminal emulation (I use VT100) additionally I set up the
inactivity timer of the modem to 5 min. with ATS19=5, this is not useful
with C/A because the link is always active (RD and SD blinking even when
you are not sending anything in the workstation).
I have two clients, one of them with six devices configured as VT100
terminals at 38400 bps with USRobotics 14.4, and the other with C/A and
USRobotics Sportster 28.8, without problems.
The link speed is managed by the modems and the ASCII ports always have the
fixed speed, even when the other side modems maybe can run at lower or
higer speeds, or even the line is noisy.
In order to get the maximum throughput I set up the speed on the emulation
program (for terminals) to 115Kbps, and in C/A to 19200.
Hope this help.
Saludos,
J.A. Meza
jameza@spin.com.mx
----------
From: gibbsd@ZELANA.COM
To: MIDRANGE-L@midrange.com
Subject: 28800 modems?
Date: Martes 22 de Abril de 1997 2:35 PM
Greetings!
Does anyone know the max speed on a ASCII WSC?
I've got a few USR Sportster 28.8 modems on our ASCII WSC, but I can't
seem to find a way to configure the MODEM to COMPUTER speed. The only
option I seem to be able to find is *CALC for the line speed.
Ideally, I would like to set it to 57600... but at minimum, I would like
to set it to 38400.
Here's how it's configured now...
Display Device Description
MDA
04/22/97
14:19:28
Device description . . . . . . . . : ASCIIPORT2
Option . . . . . . . . . . . . . . : *BASIC
Category of device . . . . . . . . : *DSP
Device class . . . . . . . . . . . : *LCL
Device type . . . . . . . . . . . : *CALC
Device model . . . . . . . . . . . : *ASCII
Emulated twinaxial device . . . . : 3197C2
Port number . . . . . . . . . . . : 2
Emulating ASCII device . . . . . . : *NO
Physical attachment . . . . . . . : *MODEM
Online at IPL . . . . . . . . . . : *YES
Attached controller . . . . . . . : CTL03
Keyboard language type . . . . . . : USB
Character identifier . . . . . . . : *KBDTYPE
Print device . . . . . . . . . . . : *SYSVAL
Output queue . . . . . . . . . . . : *DEV
Printer file . . . . . . . . . . . : QSYSPRT
Library . . . . . . . . . . . . : *LIBL
Inactivity timer . . . . . . . . . : *NOMAX
Line speed . . . . . . . . . . . . : *CALC
Word length . . . . . . . . . . . : *CALC
Type of parity . . . . . . . . . . : *CALC
Stop bits . . . . . . . . . . . . : 1
Maximum outstanding frames . . . . : 7
Idle timer . . . . . . . . . . . . : 40
NRM poll timer . . . . . . . . . . : 3
Frame retry . . . . . . . . . . . : 15
Text . . . . . . . . . . . . . . . : ASCII Port 2
TIA!
david
--
David Gibbs
Sr. Programmer Analyst
Zellweger Analytics, Inc.
Lincolnshire, IL 60069
Tel: (847) 634-2800
Fax: (847) 634-1371
Email: gibbsd@zelana.com
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