LevelOne GSW-0890 user manual Appendix B Null Modem Cable Specifications

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 1

DSR 6

DTR 4

RXD 2

TXD 3

GND 5

RTS 7

CTS 8

Reserve 9

Mnemonic			Pin
CD			1
RXD			2
TXD			3
DTR			4
GND			5
DSR			6
RTS			7
CTS			8
4			DTR
		1	CD
	6		DSR
3			TXD
2			RXD
5			GND
8			CTS
7			RTS
9			Reserve

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