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Chapter 4 Configuring the Gigabit Ethernet Ports
Installing, Removing, and Maintaining GBICs
4-4
Catalyst 2984G, 2948G-GE-TX, and 2980G Switch Hardware Installation Guide
78-6286-05
Note Because of interoperability issues, Cisco does not support GBICs purchased from
third-party vendors.
Port Cabling Specifications
Table 4-2 provides cabling specifications for the GBICs. The minimum cable
distance for all GBICs listed (MMF [multimode fiber] and SMF) is 6.5 feet (2
meters).
Note For information about the Coarse Wave Division Multiplexing (CWDM), refer to
the Cisco CWDM GBIC and CWDM SFP Installation Note.
Table 4-2 GBIC Port Cabling Specifications
GBIC Wavelength
1
(nm)
1. Nominal fiber specification wavelength.
Fiber Type
Core Size
(microns)
Modal Bandwidth
(MHz/km)
Maximum Cable
Distance
SX
2
2. MMF only.
850 MMF 62.5 160 722 ft (220 m)
62.5 200 902 ft (275 m)
50.0 400 1640 ft (500 m)
50.0 500 1804 ft (550 m)
LX/LH 1300 MMF
3
3. Patch cord required (refer to the “Patch Cord” section on page 4-10 for details).
62.5 500 1804 ft (550 m)
50.0 400 1804 ft (550 m)
50.0 500 1804 ft (550 m)
SMF 9/10 – 6.2 mi (10 km)
ZX 1550 SMF 9/10 – 43.5 mi (70 km)
SMF
4
4. Dispersion-shifted single-mode fiber-optic.
– – 62.1 mi (100 km)