What are gbic and Gbic Port cabling specifications

GBIC is the abbreviation of Giga Bitrate Interface Converter, is an interface device which converts gigabit electrical signals into light signal. The Gbic design can be used for hot-swappable. The gbic is an interchangeable product that conforms to international standards. Gigabit switches designed with GBIC interfaces are flexible and have a large market share in the market.

Cabling Specifications for Gbic ports

The following table shows the cabling specifications for the GBIC for Cisco products installed on Gigabit Ethernet ports. Note that all GBIC ports use SC-type connectors, and the minimum routing distance for All gbic (Multimode and Single-mode) is 6.5 ft (2 m).

1 use multimode fiber only.

2 A pattern adjustment patch line (cab-gelx-625 or equivalent) is required. If multimode fiber use general repair line, 1000BASELX/LH gbic and short link distance (dozens of meters) will cause the beginning saturation, resulting in BER (BER) improve. In addition, if the LX/LH gbic is used in conjunction with a 62.5 micron multimode fiber, you must install a pattern adjustment patch line between the gbic and multimode fibers at both ends of the link transceiver. If the link distance is more than 984 feet (300 meters), you also need a pattern adjustment repair line.

Note: To conform to the IEEE standard, you must use the pattern to adjust the patch line (cab-gelx-625 or equivalent products). IEEE found that the link distance does not meet the requirements when certain types of fiber cores are used. The solution is to use a pattern to adjust the patch line to emit a laser beam from the exact position off the central position. The output of the patch line follows the IEEE 802.3z 1000BaseLX standard.

Note: The ws-g5487 1000base-zx Gbic provides light energy for 21.5 db, so you must use the Optical Loss test tool to measure the optical fiber to verify that the optical loss (including joints and junctions) of the optical fiber is less than or equal to the number. A 1550nm light source must be used to measure the optical loss.