User's Manual

32 Appendix B Initializing the system
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Null modem cable setup
Table 3 and Figure 2 show the correct wiring for the BCM serial port of the null modem cable.
Figure 2 Serial pinout
Transmission parameters:
• 9600 bits per second
• 8 data bits
•no parity
• 1 stop bit
• hardware flow control
To display the configuration menus
1 Attach the null modem cable to the serial port on the BCM main unit.
2 Attach the other end of the null modem cable to the serial port on the terminal or computer.
3 Ensure that the BCM main unit and your terminal or computer are turned on.
4 Access the BCM main unit using one of the following methods:
Table 3 Serial port pinout
Pin Signal Pin Signal
1 Data Carrier Detect (DCD) 6 Data Set Ready (DSR)
2 * Serial data in (RX) 7 Request to Send (RTS)
3 * Serial data out (TX) 8 Clear to Send (CTS)
4 Data Terminal Ready (DTR) 9 Ring Indicator (RI)
5 * Ground
* required connections
Note: For instructions about how to set the transmission parameters, refer to the terminal
or terminal emulation program documentation. The BCM system supports carriage return.
Note: The location of the transmit (TX) and receive (RX) pins on your terminal can vary.
Refer to your terminal or computer documentation to confirm pin locations.
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