Rs-232 Com Ports On The Auxiliary Interface Panel - OPTICOM 764 Installation Manual

12.3.2 RS-232 COM Ports on the Auxiliary Interface Panel

There are two RS-232 COM ports on the auxiliary interface panel. These ports are labeled COM 3 and
COM4. These COM ports are configured for connection to a modem so it is probable that a null modem
adapter will be needed when they are used.
Table 12-6 Communication Port Pin Assignments (Auxiliary Interface panel)
Intersection Equipment Installation Instructions
Auxiliary Interface Panel COM 3
COM Port
Pin Number
1
2
3
4
5
6
7
8
9
Auxiliary Interface Panel COM 4
COM Port
Pin Number
1
2
3
4
5
6
7
8
9
Signal Name
DCD (Data Carrier Detect)
RXD (receive data)
TXD (transmit data)
DTR (Data Terminal Ready
GND (ground)
DCD (Data Carrier Detect)
RTS (Ready to Send)
CTS (Clear to Send)
RI (ring Indicator)
Signal Name
Not used
RXD (receive data)
TXD (transmit data)
Not used
GND (ground)
Not used
Not used
Not used
Not used
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