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B-6
Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide
OL-12246-01
Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
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).
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
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
1. Modal bandwidth applies only to multimode fiber.
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
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Router or PC
3 RD+
6 RD–
1 TD+
2 TD–
H5578
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Switch
3 TD+
6 TD–
1 RD+
2 RD–
H5579