Setup Guide: Using MultiTech Modems on Digi Ports in Unix
This guide demonstrates configuration of many MultiTech Modems
for use in a dialin application in a Unix-type environment:
- DIP Switches
If the Modem has DIP switches, set them to the async default position.
- the command sequence for the modem should be:
at&w1z -- reset modem to factory defaults
and read DIP switches if present
at$sb<port speed>s0=1&w -- locks DTE speed at port speed
and stores to NVRAM
- Follow the instructions in the Modem config FAQ for the particular
Operating System.
- Port should set for rts and cts flow control. In SCO Unix this is
ditty rtspace ctspace -ixon -ixoff -ixany /dev/ttyA01
(this can be put in the userdef file).
Other Unix versions are similar. The correct syntax for this
command in each Operating System is demonstrated in the appropriate Modem
FAQ. Consult with tech support for further assistance if needed.
Notes:
- To verify DTE port speed, use the command
ATL5
and look for the $SB setting
ATL6
will show the S registers for confirming S0=1
- Altpin needs to be configured correctly. (On for use
with 8 wire cable, off for use with 10 wire cable). The modem
may initially work with altpin set incorrectly but can fail if
the remote site disconnects abnormally.
- Some 14.4+ Modems will not work reliably if set for speeds below
38400, set modems for this speed and they will rate adapt to
match remote site and line limitations.
All information presented on these support pages is current as
of the date posted. While we try our best to keep all information
up-to-date, we can not guarantee its accuracy. For the latest information,
please contact your Digi representative.
This procedure involves the use of third party equipment. It demonstrates
a setup that has been tested and found to work. It is meant as a guide
only and is not a guarantee that particular 3rd party equipment is
suitable for use in a particular application or environment, or is 100%
compatible with our products.
Revised 12/10/98: MT
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