Appendix B Null Modem Cable Specifications - LevelOne GSW-0890 User Manual

Appendix B
Null Modem Cable
Specifications
The DB-9 cable is used for connecting a terminal or terminal emulator to the
Managed Switch's RS-232 port to access the command-line interface.
The table below shows the pin assignments for the DB-9 cable.
Function
Carrier
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
9 Pin Null Modem Cable
CD
DSR
DTR
RXD
TXD
GND
RTS
CTS
Reserve 9
Mnemonic
CD
RXD
TXD
DTR
GND
DSR
RTS
CTS
1
6
4
2
3
5
7
8
233
Pin
1
2
3
4
5
6
7
8
4 DTR
1 CD
6 DSR
3 TXD
2 RXD
5 GND
8 CTS
7 RTS
9 Reserve