Console Connector Pinouts

Pinouts for the DB-9 Console Connector describes the pinouts for a DB-9 console plug connector.

Table 1. Pinouts for the DB-9 Console Connector
Function Pin Number Direction
DCD (data carrier detect) 1 In
RXD (receive data) 2 In
TXD (transmit data) 3 Out
DTR (data terminal ready) 4 Out
GND (ground) 5 -
DSR (data set ready) 6 In
RTS (request to send) 7 Out
CTS (clear to send) 8 In

Null-Modem Cable Pinouts shows the pinouts for a 9-pin to 25-pin (RS-232) null-modem cable.

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Null-Modem Cable Pinouts

PC-AT Serial Null-modem Cable Pinouts shows the pinouts for a 9-pin to 9-pin (PC-AT) null-modem serial cable.

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PC-AT Serial Null-modem Cable Pinouts

RJ45 Console Port on Switch shows the pinouts for the RJ45 console port on the ExtremeSwitching switches.

Table 2. RJ45 Console Port on Switch
Function Pin Number Direction
CTS (clear to send) 1 In
DTR (data carrier detect) 2 Out
TXD (transmit data) 3 Out
GND (ground) 4
GND (ground) 5
RXD (receive data) 6 In
DSR (data set ready) 7 In
RTS (request to send) 8 Out

Pinouts for an RJ45 to DB-9 Adapter shows the pinouts for an RJ45-to-DB-9 adapter.

Table 3. Pinouts for an RJ45 to DB-9 Adapter
Signal RJ45 Pin DB-9 Pin
CTS (clear to send) 1 8
DTR (data carrier detect) 2 6
TXD (transmit data) 3 2
GND (ground) 4 5
GND (ground) 5 5
RXD (receive data) 6 3
DSR (data set ready) 7 4
RTS (request to send) 8 7