3Com quick start 1000BASE-SX3CB9LG2MC Module Cabling Requirements

162-PORT 1000BASE-SXAND 2-PORT 1000BASE-LX GIGABIT ETHERNET INTERFACE MODULES QUICK START GUIDE

Specifications The following tables list specifications for the GEN Interface Modules:

1000BASE-SX (3CB9LG2MC) Module Cabling Requirements

Fiber Type	Modal Bandwidth	Segment Length
	(MHz•km)
62.5/125 microns MMF	160	Up to 220 m (722 ft)
62.5/125 microns MMF	200	Up to 275 m (902 ft)
50/125 microns MMF	400	Up to 500 m (1,640 ft)
50/125 microns MMF	500	Up to 550 m (1,804 ft)
10/125 microns SMF	Not applicable	Not supported

1000BASE-LX (3CB9LG2SC) Module Cabling Requirements

	Modal Bandwidth
Fiber Type	(MHz•km)	Segment Length
62.5/125 microns MMF	500	Up to 550 m (1,804 ft)
50/125 microns MMF	400	Up to 550 m (1,804 ft)
50/125 microns MMF	500	Up to 550 m (1,804 ft)
10/125 microns SMF	Not applicable	Up to 5 km (16,404 ft)

Due to the dual media (single-mode and multimode) support of the 1000BASE-LX module, an offset-launch mode-conditioning patch cord assembly is required to meet the specifications for multimode (MMF) operation. This patch cord is not required for single mode (SMF) operation. Patch cords come in various lengths and can be ordered from Siecor Operations (800-743-2675, fax: 828-327-5973). The following table lists the part number information:

Patch Cord Cable	Description
Assembly Part Number
39575802KMCXXXM*	Mode-conditioning patch cord for 62.5 micron cables
39575802CMCXXXM*	Mode-conditioning patch cord for 50 micron cables

* XXX = the length of the cable in meters.