Cisco 3750G-12S Hardware Installation Guide - Page 114

Two Twisted-Pair Cable Pinouts, SFP Module, Wavelength, nanometers, Fiber Type, Core Size/Cladding

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Cable and Adapter Specifications Appendix B Connector and Cable Specifications Table B-3 Fiber-Optic SFP Module Port Cabling Specifications (continued) SFP Module 1000BASE-ZX (GLC-ZX-SM CWDM Wavelength (nanometers) 1550 1470, 1490, 1510, 1530, 1550, 1570, 1590, 1610 Fiber Type SMF SMF Core Size/Cladding Size (micron) G.6522 G.6522 Modal Bandwidth (MHz/km)1 - - Cable Distance 43.4 to 62 miles (70 to 100 km)4 62 miles (100 km) 1. Modal bandwidth applies only to multimode fiber. 2. A mode-field diameter/cladding diameter = 9 micrometers/125 micrometers 3. A mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000BASE-LX/LH SFP modules, and a short link distance can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP module with 62.5-micron diameter MMF, you must also install a mode-conditioning patch cord between the SFP module and the MMF cable on both the sending and receiving ends of the link. The mode-conditioning patch cord is required for link distances greater than 984 feet (300 m). 4. 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. Two Twisted-Pair Cable Pinouts Figure B-7 and Figure B-8 show the schematics of two twisted-pair cables for 10/100 ports. Figure B-7 Switch 3 TD+ 6 TD- 1 RD+ 2 RD- Two Twisted-Pair Straight-Through Cable Schematic Router or PC 3 RD+ 6 RD- 1 TD+ 2 TD- H5578 Figure B-8 Switch 3 TD+ 6 TD- 1 RD+ 2 RD- Two Twisted-Pair Crossover Cable Schematic Switch 3 TD+ 6 TD- 1 RD+ 2 RD- H5579 Catalyst 3750 Switch Hardware Installation Guide B-6 OL-6336-10

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B-6
Catalyst 3750 Switch Hardware Installation Guide
OL-6336-10
Appendix B
Connector and Cable Specifications
Cable and Adapter Specifications
Two Twisted-Pair Cable Pinouts
Figure B-7
and
Figure B-8
show the schematics of two twisted-pair cables for 10/100 ports.
Figure B-7
Two Twisted-Pair Straight-Through Cable Schematic
Figure B-8
Two Twisted-Pair Crossover Cable Schematic
1000BASE-ZX
(GLC-ZX-SM
1550
SMF
G.652
2
—
43.4 to 62 miles
(70 to 100 km)
4
CWDM
1470, 1490,
1510, 1530,
1550, 1570,
1590, 1610
SMF
G.652
2
—
62 miles (100 km)
1.
Modal bandwidth applies only to multimode fiber.
2.
A mode-field diameter/cladding diameter = 9 micrometers/125 micrometers
3.
A mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000BASE-LX/LH SFP modules, and a short link distance
can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP module with 62.5-micron diameter MMF,
you must also install a mode-conditioning patch cord between the SFP module and the MMF cable on both the sending and receiving ends of the
link. The mode-conditioning patch cord is required for link distances greater than 984 feet (300 m).
4.
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.
Table B-3
Fiber-Optic SFP Module Port Cabling Specifications (continued)
SFP Module
Wavelength
(nanometers)
Fiber Type
Core Size/Cladding
Size (micron)
Modal Bandwidth
(MHz/km)
1
Cable Distance
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