Processor Card Cable and Port Pinouts

This appendix lists the pinouts for the Ethernet cable connector and the ports on the processor card in the following sections:

Note Pins not listed are not connected.

Ethernet Cable Connector Pinouts

The Ethernet port on the processor card is an RJ-45 receptacle. Table B-1 lists the Ethernet cable connector pinouts.

Pin	Signal	Direction	Description
1	TXD+	-->	Transmit data +
2	TXD-	-->	Transmit data -
3	RXD+	<--	Receive data +
4	NC	-	No connection
5	NC	-	No connection
6	RXD-	<--	Receive data -
7	NC	-	No connection
8	NC	-	No connection

Table B-1:

Pin Signal Direction Description

1

TXD+

-->

Transmit data +

2

TXD-

-->

Transmit data -

3

RXD+

<--

Receive data +

4

NC

-

No connection

5

NC

-

No connection

6

RXD-

<--

Receive data -

7

NC

-

No connection

8

NC

-

No connection

Ethernet Cable Connector (RJ-45) Pinouts

Auxiliary Port Pinouts

The auxiliary port on the processor card is an EIA/TIA-232 DTE, DB-25 plug to which you can attach a channel service unit/data service unit (CSU/DSU), or other equipment, to access the switch from the network. Table B-2 lists the auxiliary port pinouts.

Note EIA/TIA-232 were formerly known as recommended standard RS-232 before its acceptance as a standard by the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA).

Table B-2:

Pin Signal Direction Description

1

GND

-

Shield ground

2

TXD

-->

Transmit data

3

RXD

<--

Receive data

4

RTS

-->

Request to send (used for hardware flow control)

5

CTS

<--

Clear to send (used for hardware flow control)

6

DSR

<--

Data set ready

7

Signal ground

-

Signal ground

8

CD

<--

Carrier detect (used for modem control)

20

DTR

-->

Data terminal ready (used for modem control only)

22

RI

<--

Ring indicator

Auxiliary Port (DB-25) Pinouts

Note The auxiliary port is not available on the Catalyst 8540 MSR processor card.

Console Port Pinouts

The console port on the processor card is an EIA/TIA-232, data communications equipment (DCE), DB-25 receptacle. Both data set ready (DSR) and data carrier detect (DCD) are active when the system is running. The Request To Send (RTS) signal tracks the state of the Clear To Send (CTS) input. The console port does not support modem control or hardware flow control. The console port requires a straight-through EIA/TIA-232 cable. Table B-3 lists the console port pinouts.

Pin	Signal	Direction	Description
1	GND	-	Ground
2	TXD	<--	Transmit data
3	RXD	-->	Receive data
4	RTS	-->	Ready to send¹
5	CTS	-->	Clear to send¹
6	DSR	-->	Data set ready (always on)²
7	GND	-	Ground
8	DCD	-->	Data carrier detect (always on)²
20	DTR	<--	Data terminal ready
Shield	GND	-	Shield ground

Table B-3:

Pin Signal Direction Description

1

GND

-

Ground

2

TXD

<--

Transmit data

3

RXD

-->

Receive data

4

RTS

-->

Ready to send¹

5

CTS

-->

Clear to send¹

6

DSR

-->

Data set ready (always on)²

7

GND

-

Ground

8

DCD

-->

Data carrier detect (always on)²

20

DTR

<--

Data terminal ready

Shield

GND

-

Shield ground

¹Pins 4 and 5 are connected
²Pins 6 and 8 are connected

Console Port (DB-25) Pinouts

Table of Contents