Cisco Systems ASR 9014CFD manual Identifying a Rollover Cable, Console RJ-45-to-DB-25 Port DTE

Appendix B Cable Specifications

Console Port Signals and Pinouts

Table B-5	Console Port Signaling and Cabling Using a DB-25 Adapter
Console				RJ-45-to-DB-25	Console
Port (DTE)1		RJ-45-to-RJ-45 Rollover Cable		Terminal Adapter	Device
Signal		RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
RTS		12	8	5	CTS
DTR		2	7	6	DSR/DCD
TxD		3	6	3	RxD
GND/RI		4	5	7	GND
GND		5	4	7	GND/RI
RxD		6	3	2	TxD
DSR/DCD		7	2	20	DTR
CTS		82	1	4	RTS

1.You can use the same cabling to connect a console to the auxiliary port.

2.Pin 1 is connected internally to pin 8.

Identifying a Rollover Cable

To identify a rollover cable, compare the modular plugs at the two ends of the cable. When you hold the plugs side by side, with the tab at the back, the wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug (Figure B-5.) If you purchased your cable from Cisco Systems, pin 1 is white on one connector, and pin 8 is white on the other (a rollover cable connects pins 1 and 8, 2 and 7, 3 and 6, and 4 and 5).

Figure B-5 Identifying a Rollover Cable

Pin 1 and pin 8 should be the same color

Pin 1 Pin 8

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Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide

OL-23778-01 B-5