Table Of Contents

Connector and Cable Specifications

Connector Specifications

10/100/1000 Ports

Connecting to 10BASE-T- and 100BASE-TX-Compatible Devices

Connecting to 1000BASE-T Devices

10-Gigabit Ethernet Module Interfaces

Cisco TwinGig Converter Module Ports

Console Port

Cable and Adapter Specifications

10-Gigabit Ethernet X2 Transceiver Module Cable Specifications

SFP Module Cable Specifications

Two Twisted-Pair Cable Pinouts

Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports

Identifying a Crossover Cable

Console Port Adapter Pinouts

Connector and Cable Specifications

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This appendix describes the cables and adapters that you use to connect that you use to connect the switch module to other devices. This appendix includes these sections:

•Connector Specifications

•Cable and Adapter Specifications

Connector Specifications

These sections describe the connectors used with the switch:

•10/100/1000 Ports

•10-Gigabit Ethernet Module Interfaces

•Cisco TwinGig Converter Module Ports

•Console Port

10/100/1000 Ports

The 10/100/1000 Ethernet ports on the switch module use standard RJ-45 connectors. Figure B-1 shows the pinout.

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Note You can use the mdix auto interface configuration command in the CLI to enable the automatic medium-dependent interface crossover (auto-MDIX) feature. When the auto-MDIX feature is enabled, the switch module detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a copper 10/100/1000 or 1000BASE-T SFP module port on the switch module, regardless of the type of device on the other end of the connection.

For configuration information for this feature, refer to the switch module software configuration guide or the switch module command reference.

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Connecting to 10BASE-T- and 100BASE-TX-Compatible Devices

When connecting the ports to 10BASE-T- and 100BASE-TX-compatible devices, such as servers, workstations, and routers, you can use a two or four twisted-pair, straight-through cable wired for 10BASE-T and 100BASE-TX. Figure B-6 shows the two twisted-pair, straight-through cable schematics. Figure B-8 shows the four twisted-pair, straight-through cable schematics.

When connecting the ports to 10BASE-T- and 100BASE-TX-compatible devices, such as switches or repeaters, you can use a two or four twisted-pair, crossover cable. Figure B-7 shows the two twisted-pair, crossover cable schematics. Figure B-9 shows the four twisted-pair, crossover cable schematics.

You can use Category 3, 4, or 5 cabling when connecting to 10BASE-T-compatible devices. You must use Category 5 cabling when connecting to 100BASE-TX-compatible devices.

Connecting to 1000BASE-T Devices

When connecting the ports to 1000BASE-T devices, such as servers, workstations, and routers, you must use a four twisted-pair, Category 5, straight-through cable wired for 10BASE-T, 100BASE-TX, and 1000BASE-T. Figure B-8 shows the straight-through cable schematics.

When connecting the ports to other devices, such as switches or repeaters, you must use a four twisted-pair, Category 5, crossover cable. Figure B-9 shows the crossover cable schematics.

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Note Be sure to use a four twisted-pair, Category 5 cable when connecting to a 1000BASE-T-compatible device.

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Note Use a straight-through cable to connect two ports only when one port is designated with an X. Use a crossover cable to connect two ports when both ports are designated with an X or when both ports do not have an X.

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Figure B-1 10/100/1000 Port Pinouts

10-Gigabit Ethernet Module Interfaces

The 10-Gigabit Ethernet modules use SC connectors or Infiniband 4x connectors, as shown in Figure B-2 and Figure B-3.

Figure B-2 10-Gigabit Ethernet Optical Module SC Connector

Figure B-3 10-Gigabit Ethernet Infiniband 4x Connector

Cisco TwinGig Converter Module Ports

The Cisco TwinGig Converter Module uses SFP modules for fiber-optic and copper uplink ports. Figure B-4 and Figure B-5 show the SFP module connectors.

Figure B-4 Duplex LC Cable Connector

Figure B-5 Copper SFP Module RJ-45 Connector

Console Port

The console port uses an 8-pin RJ-45 connector, which is described in Table B-4 and Table B-5. The supplied RJ-45-to-DB-9 adapter cable is used to connect the console port of the switch module to a console PC. You need to provide a RJ-45-to-DB-25 female DTE adapter if you want to connect the switch module console port to a terminal. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout information, see Table B-4 and Table B-5.

Cable and Adapter Specifications

These sections describe the cables and adapters used with the switch module.

•10-Gigabit Ethernet X2 Transceiver Module Cable Specifications

•SFP Module Cable Specifications

•Two Twisted-Pair Cable Pinouts

•Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports

•Identifying a Crossover Cable

•Console Port Adapter Pinouts

10-Gigabit Ethernet X2 Transceiver Module Cable Specifications

Table B-1 lists the port cabling specifications for the 10-Gigabit Ethernet X2 transceiver modules. Each port must match the wave-length specifications on the other end of the cable, and for reliable communications, the cable must not exceed the stipulated cable length. Table B-2 lists the transceiver optical send and receive specifications.

Table B-1 X2 Transceiver Port Cabling Specifications 

X2 Product Number	Wavelength (nm)	Cable Type	Core Size (microns)	Modal Bandwidth (MHz/km)	Maximum Cabling Distance
X2-10GB-SR	850	MMF	62.5 62.5 50.0 50.0 50.0	160 200 400 500 2000	85 feet (26 m) 108 feet (33 m) 217 feet (66 m) 269 feet (82 m) 984 feet (300 m)
X2-10GB-LX4	1310	MMF1	62.5 50.0 50.0	500 400 500	984 feet (300 m) 787 feet (240 m) 984 feet (300 m)
X2-10GB-CX4	—	InfiniBand (copper)	—	—	49 feet (15 m)
X2-10GB-LRM	1310	MMF	62.5 62.5 50.0 50.0 50.0	160 200 400 500 1500	220 m (722 feet) 220 m (722 feet) 220 m (722 feet) 220 m (722 feet) 220 m (722 feet)

1 Mode conditioning patch cord is recommended for MMF applications.

Table B-2 X2 Transceiver Optical Send and Receive Specifications 

X2 Product Number	Transceiver Type	Transmit Power (dBm)	Receive Power (dBm)	Transmit and Receive Wavelength (nm)
X2-10GB-SR	10GBASE-SR, 850-nm MMF	-11 (max) -7.3 (min)	-1.0 (max) -9.9 (min)	840 to 860
X2-10GB-LX4	10GBASE-LX4 WWWDM 1300-nm MMF	-0.5 per lane (max) —	-0.5 (max) -14.4 per lane	Four lanes; overall range: 1269 to 1356
X2-10GB-LRM	10GBASE-LR, 1310-nm MMF	0.5 (max) -6.5 (min)	0.5 (max) -8.4 (min average) and -6.4 (min in OMA)	1260 to 1355

1 The launch power shall be the lesser of the Class 1 safety limit or the maximum receive power. Class 1 laser requirements are defined by IEC 60825-1: 2001.

SFP Module Cable Specifications

Table B-3 lists the cable specifications for the fiber-optic SFP module connections. Each port must match the wave-length specifications on the other end of the cable, and for reliable communications, the cable must not exceed the required cable length. Copper 1000BASE-T SFP transceivers use standard four twisted-pair, Category 5 (or greater) cable at lengths up to 328 feet (100 meters).

Table B-3 Fiber-Optic SFP Module Port Cabling Specifications 

SFP Module	Wavelength (nanometers)	Fiber Type	Core Size/Cladding Size (micron)	Modal Bandwidth (MHz/km)1	Cable Distance
1000BASE-SX (GLC-SX-MM)	850	MMF	62.5/125 62.5/125 50/125 50/125	160 200 400 500	722 feet (220 m) 902 feet (275 m) 1640 feet (500 m) 1804 feet (550 m)
1000BASE-T (GLC-T)	N/A

1 Modal bandwidth applies only to multimode fiber.

Two Twisted-Pair Cable Pinouts

Figure B-6 and Figure B-7 show the schematics of two twisted-pair cables for connecting to 10BASE-T- and 100BASE-TX-compatible devices.

Figure B-6 Two Twisted-Pair Straight-Through Cable Schematic

Figure B-7 Two Twisted-Pair Crossover Cable Schematic

Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports

Figure B-8 and Figure B-9 show the schematics of four twisted-pair cables for 10/100/1000 ports on the switch module.

Figure B-8 Four Twisted-Pair Straight-Through Cable Schematic for 10/100/1000 Ports

Figure B-9 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 Ports

Identifying a Crossover Cable

To identify a crossover cable, compare 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 a different color from the wire connected to the pin on the inside of the right plug. (See Figure B-10.)

Figure B-10 Identifying a Crossover Cable

Console Port Adapter Pinouts

Table B-4 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.

Table B-4 Console Port Signaling Using a DB-9 Adapter 

Switch Console Port (DTE)	RJ-45-to-DB-9 Terminal Adapter	Console Device
Signal	DB-9 Pin	Signal
RTS	8	CTS
DTR	6	DSR
TxD	2	RxD
GND	5	GND
GND	5	GND
RxD	3	TxD
DSR	4	DTR
CTS	7	RTS

Table B-5 lists the pinouts for the console port, RJ-45-to-DB-25 female DTE adapter, and the console device.

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Note The RJ-45-to-DB-25 female DTE adapter is not supplied with the switch module. You can order a kit (part number ACS-DSBUASYN=) containing this adapter from Cisco.

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Table B-5 Console Port Signaling Using a DB-25 Adapter  

Switch Console Port (DTE)	RJ-45-to-DB-25 Terminal Adapter	Console Device
Signal	DB-25 Pin	Signal
RTS	5	CTS
DTR	6	DSR
TxD	3	RxD
GND	7	GND
GND	7	GND
RxD	2	TxD
DSR	20	DTR
CTS	4	RTS