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-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.
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 recieve 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).
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Greater than 984 feet (300 meters). When illuminating long lengths of MMF with an LX/LH BGIC, the mode-conditiong patch cord offsets the laser light to reduce the possibility of differential mode delay.
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CIS-WS-G5486
