Cisco Console to Moxa NPort Cable RJ45 Pinout RS232

Moxa NPort serial server connects to serial devices to Ethernet. The table below is the pinout to connect your Moxa NPort device to Cisco console for remote network access via the serial port.

Pin Colour Moxa NPort Pin Colour Cisco Console
1 White/Green DSR 2 Green Not Used
2 Green RTS 1 White/Green DTR
3 White/Orange GND 4 Blue TxD
4 Blue TxD 6 Orange GND
5 White/Blue RxD 3 White/Orange GND
6 Orange DCD 5 White/Blue RxD
7 White/Brown CTS 7 Brown DSR
8 Brown DTR 8 White/Brown Not Used


RJ-45 Pin 1







RS-232 Reference Signals

Abbreviation Name Description
DTR Data Terminal Ready DTE is ready to receive, initiate, or continue a call.
DCD Data Carrier Detect DCE is receiving a carrier from a remote DCE.
DSR Data Set Ready DCE is ready to receive commands or data.
RI Ring Indicator DCE has detected an incoming ring signal on the telephone line.
RTS Request To Send DTE requests the DCE prepare to transmit data.
RTR Ready To Receive DTE is ready to receive data from DCE. If in use, RTS is assumed to be always asserted.
CTS Clear To Send DCE is ready to accept data from the DTE.
TxD Transmitted Data Carries data from DTE to DCE.
RxD Received Data Carries data from DCE to DTE.
GND Common Ground Zero voltage reference for all of the above.
PG Protective Ground Connected to chassis ground.

RS-232 Voltage Levels

Data circuits  DC Voltage
Space – Binary 0 +3 to +15 V
Mark – Binary 1 -15 to -3 V


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