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Table of Contents

Cable and Connector Specifications

Cable and Connector Specifications

This appendix provides the following pinout information:


Note All pins not listed in the tables in this appendix are not connected.

Note Cisco Systems does not provide 4E, FE and FDDI port adapter cables. These cables must be ordered from outside commercial cable vendors. Cisco Systems also does not provide console and auxiliary cables in the kit. Console and auxiliary cables can be ordered as spares from Cisco Systems.

Console and Auxiliary Port Signals and Pinouts

The RPM requires console and auxiliary cables so you can connect a console (an ASCII terminal or PC running terminal emulation software) or modem to your RPM. Cisco system does not provide these items. You will need the following items:

For console connections, proceed to the section "Console Port Signals and Pinouts" later in this appendix; for modem connections, proceed to the section "Auxiliary Port Signals and Pinouts" later in this appendix.

Identifying a Rollover Cable

You can identify a rollover cable by comparing the two modular 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-1). 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-1: Identifying a Rollover Cable


Console Port Signals and Pinouts

Use the thin, flat RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter (labeled Terminal) to connect the console port to a PC running terminal emulation software. Figure B-2 shows how to connect the console port to a PC. Table B-1 lists 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 (labeled Terminal).


Figure B-2: Connecting the Console Port to a PC



Table B-1: Console Port Signaling and
Cabling Using a DB-9 Adapter
RPM 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

8

1

7

RTS

1Pin 1 is connected internally to pin 8.

Note This cabling configuration can also be used to connect a PC with the auxiliary port.

Use the thin, flat RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-25 female DTE adapter (labeled Terminal) to connect the console port to a terminal. Figure B-3 shows how to connect the console port to a terminal. Table B-2 lists the pinouts for the asynchronous serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 female DTE adapter (labeled Terminal).


Figure B-3: Connecting the Console Port to a Terminal



Table B-2:
Console Port Signaling and Cabling Using a DB-25 Adapter
RPM 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

8

1

4

RTS

1Pin 1 is connected internally to pin 8.

Note This cabling configuration can also be used to connect a terminal with the auxiliary port.

Auxiliary Port Signals and Pinouts

Use the thin, flat RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-25 male DCE adapter (labeled Modem) to connect the auxiliary port to a modem. Figure B-4 shows how to connect the auxiliary port to a modem. Table B-3 lists the pinouts for the asynchronous serial auxiliary port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE adapter (labeled Modem).


Figure B-4: Connecting the Auxiliary Port to a Modem



Table B-3:
Auxiliary Port Signaling and Cabling Using a DB-25 Adapter
RPM Auxiliary 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

1

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

8

1

5

CTS

4E Port Adapter Cable Pinouts

Table B-4 provides pinouts for the 4E RJ-45 connector.


Note Cisco Systems does not provide 4E port adapter cables. These cables must be ordered from outside commercial cable vendors.

Table B-4: 4E RJ-45 Connector Pinout
Pin Description

1

Receive Data + (RxD+)

2

RxD-

3

Transmit Data + (TxD+)

6

TxD-


Note Referring to the
RJ-45 pinout in Table B-4, proper common-mode line terminations should be used for the unused Category 5, UTP cable pairs 4/5 and 7/8. Common-mode termination reduces the contributions to electromagnetic interference (EMI) and susceptibility to common-mode sources. Wire pairs 4/5 and 7/8 are actively terminated in the RJ-45 port circuitry in the 4E port adapter.

Depending on your 4E, RJ-45 interface cabling requirements, use the pinouts in Figure B-5 and Figure B-6.


Figure B-5: Straight-Through Cable Pinout, 4E RJ-45 Connection to a Hub or Repeater



Figure B-6:
Crossover Cable Pinout, 4E RJ-45 Connections Between Hubs and Repeaters


Fast Ethernet Port Adapter Pinouts

Table B-5 provides pinouts for the FE-TX RJ-45 connector.


Note Cisco Systems does not provide FE port adapter cables. These cables must be ordered from outside commercial cable vendors.

Table B-5: FE-TX RJ-45 Connector Pinout
Pin Description

1

Receive Data + (RxD+)

2

RxD-

3

Transmit Data + (TxD+)

6

TxD-


Note Referring to the RJ-45 pinout in
Table B-5, proper common-mode line terminations should be used for the unused Category 5, UTP cable pairs 4/5 and 7/8. Common-mode termination reduces the contributions to electromagnetic interference (EMI) and susceptibility to common-mode sources. Wire pairs 4/5 and 7/8 are actively terminated in the RJ-45, 100BASE-TX port circuitry in the FE-TX port adapter.

Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure B-7 and Figure B-8.


Figure B-7: Straight-Through Cable Pinout, FE-TX RJ-45 Connection to a Hub or Repeater



Figure B-8:
Crossover Cable Pinout, FE-TX RJ-45 Connections Between Hubs and Repeaters



Table B-6:
MII Connector Pinout
Pin1 In Out In/Out Description

14-17

-

Yes

-

Transmit Data (TxD)

12

Yes

-

-

Transmit Clock (Tx_CLK)2

11

-

Yes

-

Transmit Error (Tx_ER)

13

-

Yes

-

Transmit Enable (Tx_EN)

3

-

Yes

-

MII Data Clock (MDC)

4-7

Yes

-

-

Receive Data (RxD)

9

Yes

-

-

Receive Clock (Rx_CLK)

10

Yes

-

-

Receive Error (Rx_ER)

8

Yes

-

-

Receive Data Valid (Rx_DV)

18

Yes

-

-

Collision (COL)

19

Yes

-

-

Carrier Sense (CRS)

2

-

-

Yes

MII Data Input/Output (MDIO)

22-39

-

-

-

Common (ground)

1, 20, 21, 40

-

-

-

+5.0 volts (V)

1Any pins not indicated are not used.
2Tx_CLK and Rx_CLK are generated by the external transceiver.

FDDI Optical Bypass Switch Pinouts


Note Cisco Systems does not provide FDDI port adapter cables. These cables must be ordered from outside commercial cable vendors.

Table B-7 lists the signal descriptions for the mini-DIN optical bypass switch available on the FDDI port adapters. The mini-DIN-to-DIN adapter cable (CAB-FMDD=) allows connection to an optical bypass switch with a DIN connector (which is larger than the mini-DIN connector on the FDDI port adapters).


Table B-7: Optical Bypass Switch Pinout
Pin Direction Description

1

Out

+5V to secondary switch

2

Out

+5V to primary switch

3

Out

Enable optical bypass switch primary

4

Out

Enable optical bypass switch secondary

5

In

Sense optical bypass switch---1 kohm to +5V

6

Out

Ground---Sense optical bypass switch return


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Posted: Tue Oct 19 08:50:54 PDT 1999
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