This article illustrates the serial pinouts of Opengear RJ45 serial ports, past and present.
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Cisco Straight (X2) pinout
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PIN
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SIGNAL
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DEFINITION
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DIRECTION
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1
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CTS
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Clear To Send
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Input
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2
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DSR
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Data Set Ready
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Input
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3
|
RXD
|
Receive Data
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Input
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4
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GND
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Signal Ground
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NA
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5
|
GND
|
Signal Ground
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NA
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6
|
TXD
|
Transmit Data
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Output
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7
|
DTR
|
Data Terminal Ready
|
Output
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8
|
RTS
|
Request To Send
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Output
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Cisco Rolled (X1) pinout
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PIN
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SIGNAL
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DEFINITION
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DIRECTION
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1
|
RTS
|
Request To Send
|
Output
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2
|
DTR
|
Data Terminal Ready
|
Output
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|
3
|
TXD
|
Transmit Data
|
Output
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|
4
|
GND
|
Signal Ground
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NA
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|
5
|
CTS
|
Clear To Send
|
Input
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|
6
|
RXD
|
Receive Data
|
Input
|
|
7
|
DCD
|
Data Carrier Detect
|
Input
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8
|
DSR
|
Data Set Ready
|
Input
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Opengear Classic (X0) pinout
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PIN
|
SIGNAL
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DEFINITION
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DIRECTION
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|
1
|
RTS
|
Request To Send
|
Output
|
|
2
|
DSR
|
Data Set Ready
|
Input
|
|
3
|
DCD
|
Data Carrier Detect
|
Input
|
|
4
|
RXD
|
Receive Data
|
Input
|
|
5
|
TXD
|
Transmit DataCTS
|
Output
|
|
6
|
GND
|
Signal Ground
|
NA
|
|
7
|
DTR
|
Data Terminal Ready
|
Output
|
|
8
|
CTS
|
Clear To Send
|
Input
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