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RLC-4 V1.79 Copyright © 1998 Link Communications Inc. 9/18/98
Appendix F: Programming with the Serial Port
Entering commands from the serial port works almost exactly the same way as with DTMF tones
from a radio. The characters you enter on the keyboard are treated the same way as the digits on
your radio keypad. Of course you can enter digits on the keyboard that you can not enter from a
keypad, which gives you a little additional flexibility. Some of the things you can do from the
keyboard that you can not do from a DTMF pad are:
• Back up. If you type a digit you did not mean to type, simply press the backspace key and
delete it.
• Press the Enter key. This tells the controller to try to execute whatever you have typed so
far. This is exactly the same as unkeying your radio to force a command to execute. When
you have entered a command you can either enter an '!' or press <Enter> to make it execute.
• Store a bunch of commands in a file on your computer that you can upload without typing
them again. See the section on using a serial upload file later in this appendix.
Example: I want to execute Command 009 to see which ports are connected together:
Over the air:
<Key radio> 009 <Unkey or press "D">
From the serial port:
<ENTER>
You will see the serial port prompt "DTMF>". This indicates that the
characters you enter are being treated just as if they were entered by DTMF
from a radio port
009 <Enter or press "!">
Example: I want to execute Command 000 to connect ports 1 and 3 together:
Over the air:
<Key radio> 000 13 <Unkey or press "D">
From the serial port:
<ENTER>
000 13 <Enter or press "!">
Now try 009 (the first example) again. The crosspoint will show that ports 1 and 3 have
been connected.
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