Cisco Systems 4948E Rollover Cable RJ-45 to DB-9 Adapter For Connecting to a PC, Rts Cts Dtr Dsr

Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications

Cables and Adapters

You can identify a rollover cable by comparing the two ends of the cable. Holding the cables 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. (See Figure B-5.) If your cable was purchased from Cisco Systems, pin 1 will be white on one connector, and pin 8 will be white on the other. (A rollover cable reverses 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

H3824

Rollover Cable RJ-45 to DB-9 Adapter (For Connecting to a PC)

Use an RJ-45-to-RJ-45 rollover cable and the RJ-45-to-DB-9 female DTE adapter (labeled Terminal) to connect the console port to a PC running terminal emulation software. Table B-16lists the pinouts for the asynchronous serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-9 female DTE adapter.

Table B-16	Port Mode 1 Signaling and Pinouts (DB-9 Adapter)
Console Port		RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-9	Console
				Terminal Adapter	Device
Signal		RJ-45 Pin	RJ-45 Pin	DB-9 Pin	Signal
RTS		11	8	8	CTS
DTR		2	7	6	DSR
TxD		3	6	2	RxD
GND		4	5	5	GND
GND		5	4	5	GND
RxD		6	3	3	TxD
DSR		7	2	4	DTR
CTS		81	1	7	RTS

1. Pin 1 is connected internally to Pin 8.

	Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide
OL-21561-02		B-13