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GBIC- Gigabit Interface Converter
The GBIC is a hot-swappable input/output device that plugs into a Gigabit Ethernet port, linking the module port with the fiber-optic network and can be installed in the Catalyst 6000, Catalyst 5000, and Catalyst 4000 family Gigabit Ethernet ports that accept GBICs.
CIS-WS-G5484
The WS-G5484 GBIC (1000BASE-SX) operates on ordinary multimode fiber (MMF) link spans of up to 1804 feet (550 meters) in length.
CIS-WS-G5486
The WS-G5486 GBIC (1000BASE-LX/LH) interfaces fully comply with the IEEE 802.3z 1000BASE-LX standard. However, their higher optical quality allows them to reach 10 km over single-mode fiber (SMF) versus the 5 km specified in 802.3z.
CIS-WS-G5487
The WS-G5487 (1000BASE-ZX GBIC) operates on ordinary single-mode fiber optic link spans up to 43.4 miles (70 km) long. Link spans of up to 62 miles (100 km) are possible using premium single-mode fiber or dispersion shifted single-mode fiber.
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Part
Number |
GBIC |
Distance |
 |
CIS-WS-G5484 |
Short
Wavelength
(1000Base-SX) |
550
Meters |
| CIS-WS-G5486 |
Long
Wavelength / Long Haul
(1000Base-LX/LH) |
10
Kilometers |
| CIS-WS-G5487 |
Extended
Wavelength
(1000Base-ZX) |
70
Kilometers |
TUG-GELX-625
When using an LX/LH GBIC with a 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 in the following situations:- Less than 328 feet (100 meters). When illuminating short lengths of MMF with an LX/LH GBIC, the mode-conditioning patch cord reduces the amount of optical power coupled into the MMF. Excessive power can saturate the LX/LH receiver causing an elevated bit error rate (BER).
- Greater than 984 feet (300 meters). When illuminating long lengths of MMF with an LX/LH GBIC, the mode-conditioning patch cord offsets the laser light to reduce the possibility of differential mode delay.
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