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Cisco 1000BASE-LX/LH interfaces fully comply with the IEEE 802.3z 1000BASE-LX
Note
standard. However, the higher optical quality of the 1000BASE-LX/LH allows them to
reach 10 km over single-mode fiber (SMF), as compared to the 5 km specified in the
standard.
Because of interoperability issues, Cisco does not support GBICs purchased from
Note
third-party vendors.
GBIC Cabling Distances
Table 7 lists the recommended maximum station-to-station cabling distances for the supported types of
GBICs.
Table 7
GBIC
SX
LX/LH
ZX
1. MMF=multimode fiber
2. SMF=single-mode fiber
3. A dispersion-shifted single-mode fiber-optic cable is required for 62.1 mi (100 km) distance
The minimum cabling distance for GBICs is 6.5 feet (2 meters).
Note
78-10164-03
GBIC Station-to-Station Cabling Distances
Wavelength
(nm)
Fiber Type
1
850
MMF
1
1300
MMF
2
SMF
2
1550
SMF
3
SMF
Installation and Configuration Note for the Catalyst 4000 Layer 3 Services Module
Core Size
Modal Bandwidth
(microns)
(MHz/km)
62.5
160
62.5
200
50.0
400
62.5
500
62.5
500
50.0
400
50.0
500
9/10
-
9/10
-
8
-
Gigabit Interface Converters
Maximum Cable
Distance
722 ft. (220 m)
902 ft. (275 m)
1640 ft. (500 m)
1804 ft. (550)
1804 ft. (550)
1804 ft. (550)
1804 ft. (550)
6.2 mi(10 km)
43.5 mi (70 km)
62.1 mi (100 km)
11
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