Code Operated Matrix Switch
30
Important Configuration Notes:
• Your COMS port, LINKUP, and DOS must be
configured exactly the same way (see the
instructions above for more details).
• The fastest data speed possible with DOS MODE
COM commands is 9600 bps.
• If you’re sending graphics data, you’ll probably
need to configure everything for an “8-bit” (data
bits) word length.
• DOS and many application programs use
hardware flow control (CTS input Pin 5). See
the COMS manual for how to configure the
COMS unit for hardware flow control.
• The attention string configured in LINKUP
must match the attention string for your COMS
port.
• The COMS unit’s BREAK DETECTION option
for your port must be set to “BREAK TO DIS-
CONNECT” in order for the LINKUP support
program to execute all of its menu options.
PROBLEM: I’m still having problems.
If you still need help, check these sources:
• Your COMS user’s manual for information on
hardware problems.
• LINKUP’s on-line help information.
• Your DOS manual for help on any of the DOS
commands, and also on EDLIN (the editing pro-
gram you can use to create or change your
AUTOEXEC.BAT file).
NOTE: You have to configure the COMS, LINKUP,
and DOS only once, not every time you run
LINKUP.
The COM port on your computer is connected to
the COMS with a serial communications cable. In
order for the LINKUP and DOS to successfully
communicate with the COMS, make sure you follow
these recommendations:
• Set the COMS DTE/DCE shunt jumper in the
DCE position.
• Connect the PC COM port to the COMS port
with a straight-through cable (not a null-modem
cable).
• Make sure your cable supports these signals:
TXD, RXD, CTS, DSR, GND, DCD, and DTR.