Overview
Table 5 | GBIC Port Cabling Specifications | | |
| | | | | | |
| | | | Core Size1 | Modal | |
| | Wavelength | | Bandwidth | |
GBIC | | (nm) | Fiber Type | (micron) | (MHz/km) | Cable Distance |
| | | | | | |
SX2 | | 850 | MMF | 62.5 | 160 | 722 feet (220 meters) |
(WS-G5484) | | | 62.5 | 200 | 902 feet (275 meters) |
| | | | 50.0 | 400 | 1640 feet (500 meters) |
| | | | 50.0 | 500 | 1804 feet (550 meters) |
| | | | | | |
LX/LH | | 1310 | MMF3 | 62.5 | 500 | 1804 feet (550 meters) |
(WS-G5486) | | | 50.0 | 400 | 1804 feet (550 meters) |
| | | | 50.0 | 500 | 1804 feet (550 meters) |
| | | SMF | 8.3/9/10 | – | 6.2 miles (10 km) |
| | | | | | |
ZX | | 1550 | SMF | 8.3/9/10 | – | 43.5 miles (70 km) |
(WS-G5487) | | | 8 | – | 4 |
| | 62.1 miles (100 km) |
1.The numbers given for multimode fiber-optic cable refer to the core diameter. For single-mode fiber-optic cable,
8.3 microns refers to the core diameter. The 9-micron and 10-micron values refer to the mode-field diameter (MFD), which is the diameter of the light-carrying portion of the fiber. This area consists of the fiber core plus a small portion of the surrounding cladding. The MFD is a function of the core diameter, the wavelength of the laser, and the refractive index difference between the core and the cladding.
2.Use with MMF only.
3.When using an LX/LH GBIC with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord (CAB-GELX-625 or equivalent) between the GBIC and the MMF cable on both the transmit and receive ends of the link. The mode-conditioning patch cord is required for link distances less than 328 feet (100 m) or greater than 984 feet (300 m). The mode-conditioning patch cord prevents overdriving the receiver for short lengths of MMF and reduces differential mode delay for long lengths of MMF.
4.Requires dispersion-shifted single-mode fiber-optic cable.
Note The mode-conditioning patch cord (CAB-GELX-625 or equivalent) is required to comply with IEEE standards. The IEEE found that link distances could not be met with certain types of fiber-optic cable cores. The solution is to launch light from the laser at a precise offset from the center by using the mode-conditioning patch cord. At the output of the patch cord, the LX/LH GBIC is compliant with the IEEE 802.3z standard for 1000BASE-LX.
| | Gigabit Interface Converter Installation Note | | | |
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| 78-5399-03 Rev. A0 | | | 5 | |
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