B-6

Cisco CGS 2520 Hardware Installation Guide
OL-31444-01
Appendix B Connector and Cable Specifications
Cables and Adapters
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.

Cable Pinouts
Figure B-5 Two Twisted-Pair Straight-Through Cable Schematic for 10/100 Ports
Extended temperature SFPs
100BASE
LX/LH
(SFP-GE-L)
1300 MMF or SMF 62.2
50
50
9/10
500
400
500
—
1804 feet (550
m) 1804 feet
(550 m) 1804
feet (550 m)
6.2 miles (10
km)
100BASE SX
(SFP-GE-S)
850 MMF 62.5
62.5
50.0
50.0
160
200
400
500
722 feet (220 m)
902 feet (275 m)
1640 feet (500
m)
1804 feet (550
m)
100BASE ZX
(SFP-GE-Z)
1550 SMF
SMF
9/10
8
— 43.5 miles (70
km)
62.1 miles (100
km)
100BASE EX
(GLC-EX-SMD
)
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.
Table B-1 Fiber-Optic SFP Module Port Cabling Specifications (continued)
Type of SFP
Module
Wavelength
(nanometers) Fiber Type
Core
Size/Cladding
Size (micron)
Modal
Bandwidth
(MHz/km)1Cable Distance
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Router or PC
3 RD+
6 RD–
1 TD+
2 TD–
H5578