Cable and Port Pinouts

This appendix lists the pinouts for the Ethernet cable connector and ports on the Catalyst 8510 switch route processor and unshielded twisted-pair (UTP) line module. It includes the following sections:

Note Pins not listed are not connected.

Ethernet Cable Connector Pinouts

The Ethernet ports on the switch route processor and the UTP line module are RJ-45 receptacles. Table B-1 lists the Ethernet cable connector pinouts.

Note The Ethernet port on the switch route processor is not routable.
Table B-1: Ethernet Cable Connector (RJ-45) Connector Pinouts

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

Note To connect a Catalyst 8510 to a router (such as the Cisco 7500) with UTP cable, use a straight cable. To connect the device to a switch (such as the Catalyst 5500), use a crossover cable.

Auxiliary Port Pinouts

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

Note EIA/TIA-232 and EIA/TIA-449 were known as recommended standards RS-232 and RS-449 before their acceptance as standards by the Electronic Industries Association (EIA) and Telecommunications Industry Association (TIA).

Table B-2: Auxiliary Port (DB-25) Pinouts

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

Console Port Pinouts

The console port on the switch route processor 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.

Table B-3: Console Port (DB-25) 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

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

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

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