Table Of Contents
Switched 10BaseT and 100BaseTX RJ-45 Ports
Switched 100BaseFX Duplex SC Port
Switched 100-Mbps MT-RJ Fiber Ports
Connectors and Cables
This appendix provides connector and cable descriptions for the following switch ports:
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Switched 10BaseT and 100BaseTX RJ-45 ports
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Switched 10BaseT and 100BaseTX RJ-45 Ports
The 10BaseT ports (1x through 12x or 24x) and the 100BaseTX ports (Ax and Bx) use RJ-45 connectors (Figure B-1). describes the port pin assignments.
Figure B-1 10BaseT RJ-45 Connector
Table B-1 10BaseT and 100BaseTX
RJ-45 Port Pin Assignments1
RD+
2
RD-
3
TD+
4
NC
5
NC
6
TD-
7
NC
8
NC
As indicated by the X, the 10BaseT and 100BaseTX ports have their transmit (TD) and receive (RD) signals internally crossed for attachment of an adapter using a straight-through cable.
When connecting the 10BaseT ports to 10BaseT-compatible servers, routers, or workstations, use a straight-through cable wired for 10BaseT. When connecting to other switches or repeaters, use a crossover cable.
When connecting the 100BaseTX ports to 100BaseT-compatible servers, routers, or workstations, use a straight-through cable. When connecting to the 100BaseTX port on another switch or hub, use a crossover cable.
Note
The schematics for the crossover and straight-through cables are shown in Figure B-2 and Figure B-3, respectively.
Figure B-2 Crossover Cable Schematic
Figure B-3 Straight-Through Cable Schematic
Switched 100BaseFX Duplex SC Port
The 100BaseFX port (Ax), as illustrated in , uses a duplex SC connector.
Figure B-4 SC Connector
The fiber-optic connections between the switch and the attached device can be as follows:
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Switched 100-Mbps MT-RJ Fiber Ports
The 100-Mbps fiber ports (A and B), as illustrated in , uses MT-RJ connectors, and you must use the appropriate MT-RJ fiber-optic patch cable to connect these ports to the SC or ST port(s) on the other 100BaseFX-compatible device(s). For information about fiber-optic cabling distances, see the "Switched 100BaseFX Duplex SC Port" section.
You can order MT-RJ patch cable from your cable vendor, or you can order these cables from Cisco:
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The fiber-optic wavelength of the ports is 1300 nanometers.
Figure B-5 MT-RJ Connectors
Switched 10-Mbps AUI Port
The Ethernet AUI port uses a 15-pin female connector, as shown in . The pin assignments for this port are described in .
Figure B-6 AUI Port
Console Port
The console port uses an 8-pin RJ-45 connector, as shown in Figure B-1. The supplied RJ-45-to-RJ-45 rollover cable and adapters are used to connect the switch console port to a management station or modem. The following sections describe the rollover cable 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 cable ends 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-7 Identifying a Rollover Cable
Connecting to a PC
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. shows how to connect the console port to a PC. lists the pin assignments for the console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL). This adapter is supplied with the switch.
Figure B-8 Connecting the Console Port to a PC
Table B-3 Console Port Signaling and Cabling Using a DB-9 Adapter
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 (inside the terminal adapter) to Pin 8.
Connecting to a Terminal
lists the pin assignments for the console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 female DTE adapter.
Note
Table B-4 Console Port Signaling and Cabling Using a DB-25 Adapter
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 (inside the terminal adapter) to Pin 8.
Connecting to a Modem
lists the pin assignments for the console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE adapter.
Note
Table B-5 Console Port Signaling and Cabling Using a DB-25 Adapter
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 (inside the terminal adapter) to Pin 8.
