3Com DUA1771-0AAA01 manual Introduction

SuperStack® 3 Switch 4900 Series 1000BASE-SX Module (3C17710) User Guide

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INTRODUCTION

The 1000BASE-SX Module (3C17710) provides your SuperStack® 3 Switch 4900 series with full duplex, four wire speed Gigabit Ethernet fiber optic ports. This allows you to provide connectivity between the Switch and remote workgroups or to create a high capacity aggre- gated link backbone connection.

The Module conforms to the full duplex implementation of the Gigabit Ethernet standard, IEEE 802.3z. The ports use 62.5 ∝m or 50 ∝m multimode fiber optic cable with MT-RJ duplex connectors, and support the segment lengths specified in IEEE 802.3z, as shown below:

Fiber Size	Fiber Bandwidth	Segment Lengths Supported
	at 850 nm
62.5 ∝m	160 MHz/km	2–220 m (7–722 ft)
	200 MHz/km	2–275 m (7–902 ft)
50 ∝m	400 MHz/km	2–500 m (7–1805 ft)
	500 MHz/km	2–550 m (7–1805 ft)

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