
MICROSENS
8 Port Gigabit Ethernet Switch
User’s Manual
231
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
Mnemonic
Pin
Carrier
CD
1
Receive Data
RXD
2
Transmit Data
TXD
3
Data Terminal Ready
DTR
4
Signal Ground
GND
5
Data Set Ready
DSR
6
Request To Send
RTS
7
Clear To Send
CTS
8
9 Pin Null Modem Cable
CD
1
4
DTR
DSR
6
1
CD
DTR 4
6 DSR
RXD
2
3
TXD
TXD
3
2
RXD
GND
5
5
GND
RTS
7
8
CTS
CTS
8
7
RTS
Reserve 9
9
Reserve
MICROSENS
reserves the right to make any changes without further notice to any product to improve reliability,
function or design.
MICROSENS
does not assume any liability arising out of the application or use of any product. FR 4706