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This appendix contains the following topics:
The 10/100 Ethernet ports use standard RJ-45 connectors and Ethernet pinouts with internal crossovers. These ports have the send (TD) and receive (RD) signals internally crossed so that a twisted-pair straight-through cable and adapter can be attached.
Figure B-1 10/100 Port Pinouts
When connecting 10/100 ports to 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-5 shows the two twisted-pair straight-through cable schematics. Figure B-7 shows the four twisted-pair straight-through cable schematics.
When connecting the ports to other devices, such as switches or repeaters, you can use a two or four twisted-pair crossover cable. Figure B-6 shows the two twisted-pair crossover cable schematics. Figure B-8 shows the four twisted-pair crossover cable schematics.
If auto-MDIX is disabled, use a straight-through cable to connect ports when only one port is labeled with an X. Use a crossover cable to connect ports when both ports are labeled with an X or when both ports are not labeled with an X.
You can use Category 3, 4, or 5 cabling when connecting to 10BASE-T-compatible devices. You must use Category 5 (or higher) cabling when connecting to 100BASE-TX-compatible devices.
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 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, 10/100/1000, or 1000BASE-T SFP module port on the switch, regardless of the type of device on the other end of the connection.
Figure B-2 Fiber-Optic SFP Module LC Connector
Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051 |
The 10/100/1000 Ethernet ports on the dual-purpose ports use RJ-45 connectors.
Figure B-3 10/100/1000 Port Pinouts
The alarm port uses an RJ-45 connector. See the "Alarm Ports" section for more information.
Figure B-4 Alarm Port Pinouts
The following lists the alarm rating information
•Alarm Input Electrical Specification: 8V @ 1mA
•Alarm Output Electrical Specification: 30V @ 1A
Note Due the RJ-45 design (connector pin spacing), the alarm output does not support AC voltage.
Each port must match the wave-length specifications on each end of the cable, and for reliable communications, the cable must not exceed the allowable length. Copper 1000BASE-T SFP transceivers use standard four twisted-pair, Category 5 (or greater) cable at lengths up to 328 feet (100 meters).
Note The maximum operating temperature of the switch varies depending on the type of SFP module that you use. See Table 1-2 for information on the supported temperature ranges.
|
(nanometers) |
|
|
|
|
---|---|---|---|---|---|
|
|||||
1000BASE-SX |
850 |
MMF |
62.5/125 |
160 |
722 feet (220 m) |
1000BASE-LX/LH |
1310 |
SMF |
G.6522 |
— |
32,810 feet (10 km) |
100BASE-LX (GLC-FE-100LX-RGD) |
1310 |
SMF |
G.6522 |
— |
32,810 feet (10 km) |
100BASE-FX (GLC-FE-100FX-RGD) |
1310 |
MMF |
50/125 |
500 |
6,562 feet (2 km) |
1000BASE-ZX |
1550 |
SMF |
G.6522 |
— |
43.4 to 62 miles |
|
|||||
1000BASE-BX10-D |
1490 TX |
SMF |
G.6523 |
— |
32,810 feet (10 km) |
100BASE-LX (GLC-FE-100LX) |
1310 |
SMF |
G.6522 |
— |
32,810 feet (10 km) |
100BASE-BX (GLC-FE-100BX-D |
1310 TX |
SMF |
G.6522 |
— |
32,810 feet (10 km) |
100BASE-FX (GLC-FE-100FX) |
1310 |
MMF |
50/125 |
500 |
6,562 feet (2 km) |
100BASE-EX (GLC-FE-100EX) |
1310 |
SMF |
G.6522 |
— |
131,240 feet (40 km) |
100BASE-ZX (GLC-FE-100ZX) |
1550 |
SMF |
G.652 |
— |
262,480 feet (80 km) |
CWDM |
1470, 1490, 1510, 1530, 1550, 1570, 1590, 1610 |
SMF |
G.6522 |
— |
62 miles (100 km) |
|
|||||
100BASE LX/LH |
1300 |
MMF or SMF |
62.2 |
500 |
1804 feet (550 m) 1804 feet (550 m) 1804 feet (550 m) |
100BASE SX |
850 |
MMF |
62.5 |
160 |
722 feet (220 m) |
100BASE ZX |
1550 |
SMF |
9/10 |
— |
43.5 miles (70 km) |
100BASE EX |
1310 |
SMF |
G.6522 |
— |
24.9 miles (40 km) |
1 Modal bandwidth applies only to multimode fiber. 2 1000BASE-ZX SFP modules can send data up to 62 miles (100 km) by using dispersion-shifted SMF or low-attenuation SMF; the distance depends on the fiber quality, the number of splices, and the connectors. 3 A mode-field diameter/cladding diameter = 9 micrometers/125 micrometers. |
Note When the fiber-optic cable span is less than 15.43 miles (25 km), insert a 5-decibel (dB) or 10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the 1000BASE-ZX SFP module.
Figure B-5 Two Twisted-Pair Straight-Through Cable Schematic for 10/100 Ports
Figure B-6 Two Twisted-Pair Crossover Cable Schematic for 10/100 Ports
Figure B-7 Four Twisted-Pair Straight-Through Cable Schematic for 1000BASE-T Ports
Figure B-8 Four Twisted-Pair Crossover Cable Schematics for 1000BASE-T Ports
To identify a crossover cable, hold the cable ends side-by-side, with the tab at the back. The wire connected to pin 1 on the left end should be the same color as the wire connected to pin 3 on the right end. The wire connected to pin 2 on the left end should be the same color as the wire connected to pin 6 on the right end.
Figure B-9 Identifying a Crossover Cable
The console port uses an 8-pin RJ-45 connector, which is described in Table B-2 and Table B-3. If you did not order a console cable, you need to provide an RJ-45-to-DB-9 adapter cable to connect the switch console port to a PC console port. You need to provide an RJ-45-to-DB-25 female DTE adapter if you want to connect the switch console port to a terminal. You can order an adapter (part number ACS-DSBUASYN=). For console port and adapter pinout information, see Table B-2 and Table B-3.
Table B-2 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.
Table B-3 lists the pinouts for the switch console port, RJ-45-to-DB-25 female DTE adapter, and the console device.
Note The RJ-45-to-DB-25 female DTE adapter is not supplied with the switch. You can order this adapter from Cisco (part number ACS-DSBUASYN=).