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Cable and Adapter Specifications
SFP Module Cable Specifications
Table B-3
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
1000BASE-SX
(GLC-SX-MM)
1000BASE-T (GLC-T)
1. Modal bandwidth applies only to multimode fiber.
Two Twisted-Pair Cable Pinouts
Figure B-6
and 100BASE-TX-compatible devices.
Figure B-6
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Figure B-7
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide
B-6
lists the cable specifications for the fiber-optic SFP module connections. Each port must
Wavelength
(nanometers)
Fiber Type
850
MMF
N/A
and
Figure B-7
show the schematics of two twisted-pair cables for connecting to 10BASE-T-
Two Twisted-Pair Straight-Through Cable Schematic
Router or PC
3 RD+
6 RD–
1 TD+
2 TD–
Two Twisted-Pair Crossover Cable Schematic
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Core Size/Cladding
Modal Bandwidth
Size (micron)
(MHz/km)
62.5/125
160
62.5/125
200
50/125
400
50/125
500
Appendix B
Connector and Cable Specifications
1
Cable Distance
722 feet (220 m)
902 feet (275 m)
1640 feet (500 m)
1804 feet (550 m)
OL-12246-01
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