Console Connector Pinouts

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

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

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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.

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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