Adtec digital RD-70 (version 1.02.04) Manual - Manual (Page 36)

COM1/COM2 to DB9 Serial Adapter
The COM1 and COM2 port is an industry standard RS-232 DTE device on RJ45/RJ48. Units
ship with RJ45 to DB9 adapters that are pinned per the following.
DB9 PIN DB9 Function RJ45 Pin RJ45 Function
1 Carrier Detect (CD) 2 No Connect / Carrier Detect (DCD)
2 Receive Data (RXD) 6 Transmit Data (TXD)
3 Transmit Data (TXD) 5 Receive Data (RXD)
4 Data Terminal Ready
(DTR) 1 Data Set Ready (DSR)
5 Ground (GND) 4 Ground (GND)
6 Data Set Ready (DSR) 3 Data Terminal Ready (DTR)
7 Request to Send (RTS) 7 Clear to Send (CTS)
8 Clear to Send (CTS) 8 Request to Send (RTS)
9 Ring Indicator (RI) NC / NA No Connect / Not available on RJ45
GPIO and Parport information
The GPIO port allows decoder control and TTL voltage output for monitoring systems.
The GPIO feature is not enabled at this time.
The DVC Parport allows custom events to be programmed upon input pin voltage
change. It contains 4 available inputs for custom commands. Please contact technical
support for advanced usage in programming the parallel port.
GPIO Pinout
PIN Designation Function
1 NC No Connect
2 D3 reserved for future functionality