Campbell Scientific COM300 Voice Communication Modem - Manual (Page 15)

A-1
Appendix A. CS I/O 9 Pin Serial Port
The modem’s CS I/O port is not a standard RS232 connection.
A.1 Pin Description
The COM300 modem connects to the datalogger using an SC12 cable
connected to the devices’ 9-pin subminiature D-type socket connector. This
connector is shown in Figure A-1. Table A-1 shows the I/O pin configuration,
and gives a brief description of the function of each pin.
CS I/O
FIGURE A-1. 9 Pin Connector
NOTE