User`s guide

Connecting to a PC
To connect the radio modem to a personal computer use the 9 way modem cables
supplied. If the computer has a 25 way connector then the use of a suitable 25 way to
9 way adapter should be used. Note the remaining RS232 signals are not connected
internally in the RMX232 radio modem.
2
3
4
5
7
8
2
3
4
5
7
8
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Request To Send
Clear To Send
PC Serial Port
DTE D9
Radio Modem
DCE D9F
PC connector (9 way) to radio modem (9 way)
2
3
4
5
7
8
3
2
20
7
4
5
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Request To Send
Clear To Send
PC Serial Port
DTE D25
Radio Modem
DCE D9F
PC connector (25 way) to radio modem (9 way)
When using the Radio Modem with equipment capable of RTS/CTS hardware flow
control it is always advisable to enable it to prevent the possibility of data buffer
overflows within the Radio Modem itself.
Ensure that your communications software on the host computer is configured to the
selected baud rate, 8 data bits, 1 stop bit and RTS/CTS flow control.
User’s Guide Connecting the Radio Modem 5-2