Console & Auxiliary Router pins to RJ45 pins

  

Console Port Pinouts (RJ-45)

Pin

Signal

Input/Output

1 - -
2 DTR Output
3 TXD Output
4 GND -
5 GND -
6 RXD Input
7 CD Input
8 - -

Auxiliary Port Pinouts (RJ-45)
Pin Signal Input/Output
1 RTS Output
2 DTR Output
3 TXD Output
4 GND -
5 GND -
6 RXD Input
7 CD Input
8 CTS Input

 

The connection of pins between the RJ-45 connector and the end device depends on the type of cable and adapter used.

Either a straight or rolled cable can be used.


RJ-45 Straight and Rolled Cables
RJ-45 Pins Straight Cable Pinout Rolled Cable Pinout
1 1 8
2 2 7
3 3 6
4 4 5
5 5 4
6 6 3
7 7 2
8 8 1

Pins for the RJ-45, MDTE/FDTE, MDCE/FDCE, and MMOD
Cable DB-25 Adapters
RJ-45 Pins MDTE/FDTE Pins1 MDCE/FDCE Pins MMOD Pins2
1 4 5 5
2 20 6 8
3 2 3 3
4 7 7 7
5 7 7 7
6 3 2 2
7 6 20 20
8 5 4 4

1 The FDTE adapter that is available through Cisco is labeled "Terminal."
2 The MMOD adapter that is available through Cisco is labeled "Modem."

Connection Configuration
Cisco 2500 Port RJ-45 Cable Type DB-25 Adapter End Device
Console Rolled MDTE/FDTE Terminal
Console Straight MDCE/FDCE Terminal
Console1 Rolled MMOD Modem
Aux Rolled MDTE/FDTE Terminal
Aux Straight MDCE/FDCE Terminal
Aux Rolled MMOD Modem

1 Connecting a modem to the console port is not recommended. The console port does not have modem or flow control.

RJ-45-to-DB-9 Adapter Pinouts
RJ-45 Pin Signal DB-9 Pin
1 RTS 7
2 DTR 4
3 TXD 3
4 GND 5
5 GND 5
6 RXD 2
7 DSR 6
8 CTS 8