Bridge Management Module Installation and Configuration Guide
Connectors and Cabling
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Connectors and Cables

Table Of Contents

Connectors and Cables

10BaseT and 100BaseTX Connectors

100BaseFX Connector

Console Cables and Adapters

Identifying a Rollover Cable

Connector and Adapter Pinouts


Connectors and Cables


This appendix provides BMM connector pinouts and instructions for identifying and connecting cables and adapters to ports.

10BaseT and 100BaseTX Connectors

The 10BaseT and 100BaseTX ports use standard RJ-45 connectors for Category 5 UTP cabling (see ). The 10BaseT and 100BaseTX ports have their transmit (TD) and receive (RD) pairs internally crossed. shows the connector pinout, and shows the straight-through and crossover cable schematics.

Figure B-1 RJ-45 10BaseT and 100BaseTX Port Connector

Figure B-2 10BaseT and 100BaseT Pinout and Connector

Figure B-3 Straight-Through and Crossover Cable Schematics

100BaseFX Connector

The 100BaseFX port connector (see ) is a multimode fiber-optic SC (square connector).

Figure B-4 100BaseFX SC Connector

Console Cables and Adapters

The RJ-45-to-RJ-45 rollover cable and adapters supplied with the BMM are used to connect the BMM console port to a console terminal or modem. The following sections describe cables and adapters for the console port.

Identifying a Rollover Cable

You can identify a rollover cable by comparing the two modular ends of the cable. Hold 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 .) If your cable came from Cisco Systems, pin 1 is white on one connector, and pin 8 is 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

Connector and Adapter Pinouts

, , and list the pinouts for the console port, the RJ-45-to-RJ-45 rollover cable, and the following adapters:

RJ-45-to-DB-9 female DTE adapter (labeled "TERMINAL")

RJ-45-to-DB-25 female DTE adapter (labeled "TERMINAL")

RJ-45-to-DB-25 male DCE adapter (labeled "MODEM")

Table B-1

Console
Port (DTE)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-9
Terminal Adapter
Console
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.


Console-to-PC Signaling Using a DB-9 Adapter

Table B-2

Console
Port (DTE)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Terminal Adapter
Console
Device
Signal
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal

RTS

11

8

5

CTS

DTR

2

7

6

DSR

TxD

3

6

3

RxD

GND

4

5

7

GND

GND

5

4

7

GND

RxD

6

3

2

TxD

DSR

7

2

20

DTR

CTS

81

1

4

RTS

1 Pin 1 is connected internally to Pin 8.


Console-to-Terminal Signaling Using a DB-25 Adapter

Table B-3

Console
Port (DTE)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Modem Adapter
Modem
Signal
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal

RTS

11

8

4

RTS

DTR

2

7

20

DTR

TxD

3

6

3

TxD

GND

4

5

7

GND

GND

5

4

7

GND

RxD

6

3

2

RxD

DSR

7

2

8

DCD

CTS

81

1

5

CTS

1 Pin 1 is connected internally to Pin 8.


Console-to-Modem Signaling Using a DB-25 Adapter