Cisco Systems OL-7861-01 manual Gigabit Ethernet Interface, GBIC Laser Optical Transceiver Modules

Cabling and Specifications

Gigabit Ethernet Interface

This section describes the Gigabit Ethernet interface:

•GBIC Laser Optical Transceiver Modules, page 43

•Gigabit Ethernet SFP Modules, page 47

•10-Gigabit Ethernet, page 49

GBIC Laser Optical Transceiver Modules

The Gigabit Interface Converters (GBICs) are field-replaceable modules that plug into receptacles on the line card and provide the Gigabit Ethernet optical interface. The GBICs have two optical interfaces—laser transmit (TX) and laser receive (RX)—and an electrical interface (to the line card). All GBIC module types have dual SC connectors. Different GBICs can be ordered for each port on the line card. The 1-Port Gigabit Ethernet and 3-Port Gigabit Ethernet line cards use GBICs to provide the Gigabit Ethernet optical interface.

The following sections provide information on the GBIC and Coarse Wave Division Multiplexing (CWDM) GBIC in Ethernet line cards:

•GBIC Modules, page 43

•Using CWDM GBICs with the 3-Port Gigabit Ethernet Line Card, page 45

•General CWDM GBIC Installation and Usage Guidelines, page 46

•Related CWDM Documentation, page 46

•General Connection Rules for CWDM GBICs, page 46

GBIC Modules

Fiber-optic transmission specifications identify two types of fiber: single-mode and multimode. Signals can travel farther through single-mode fiber than through multimode fiber.

The 1-Port Gigabit Ethernet and 3-Port Gigabit Ethernet line cards support multimode fiber through the WS-G5484= GBIC laser optical transceiver module and single-mode fiber through the WS-G5486=, WS-G5487=. The 3-Port Gigabit Ethernet line card also supports CWDM-GBIC-xxxx= GBIC laser optical transceiver modules.

Table 10 describes the operating parameters for available GBIC laser optics.

Table 10 Ethernet GBIC Laser Optic Parameters

GBIC Module/				Distance1
Connector	Type	Wavelength	Fiber Type
WS-G5484=	Shortwave (multimode shorthaul)	850 nm	62.5 micron MMF	902 feet (275 m)
SC connector
	Defined by 1000BASE-SX		50 micron MMF	1804 feet (550 m)
	standard, IEEE 802.3
WS-G5486=	Longwave (single-mode longhaul)	1310 nm	10/9 micron SMF	6.2 miles (10 km)
SC connector	Compliant with 1000BASE-LX
	standard, IEEE 802.3

Cisco XR 12000 Series Router Ethernet Line Card Installation

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