Zhone ETHX-DS3-1-LT Installation Instructions Manual page 21

DB9 to 8-Pin Modular Adapter Pin Assignments
To connect the COM port to the DB9 serial port of a PC, use an adapter wired as
shown:
Table 4. DB9 to 8-Pin Modular Adapter Pinouts
Pin
8-Pin Modular Port
1 Transmit Data
2 Data Set Ready
4 Receive Data
5 Ground
6 Data Terminal Ready
Pins not shown are unused.
Direction
TxD
DSR
RxD
GN
D
DTR
21
PC RS232 Serial Port
RxD Receive Data
RTS Request to Send
TxD Transmit Data
GND Ground
CTS Clear to Send
Pin
2
7
3
5
8