3Com 1000BASE-T-GBIC User Manual

GBIC Transceiver

Installation Guide

For 3Com Gigabit Interface Converter (GBIC) Transceivers

Description The Gigabit Interface Converter (GBIC) ports on your system connect to

Gigabit Ethernet networks through a GBIC transceiver (Figure 1),
providing a high-speed connection over fiber-optic or copper cable. The
transceiver connects to the network using a fiber-optic duplex subscriber
connector (SC) or a RJ-45 connector. You can remove and replace the
transceiver with the system on (which is called hot-swapping).

Figure 1 GBIC Fiber-Optic Transceiver

To ensure optimal performance, compatibility, and regulatory compliance,
use only GBIC transceivers that 3Com supports. For a list of currently
supported GBICs, see this 3Com Web site:

http://www.3com.com/products/en_US/prodlist.jsp?tab=cat&pathtype=purch
ase&cat=227&selcat=LAN+Switches+%28Modular%29

For the most up-to-date information about this and other 3Com
products, always see the User Guides and Release Notes at this 3Com
Web site:

http://www.3com.com/products/en_US/prodlist.jsp?tab=cat&pathtype=supp
ort&cat=227&selcat=LAN+Switches+%28Modular%29&family=526

2 GBIC Transceiver Installation Guide

1000BASE-SX GBIC

Transceivers

1000BASE-LX GBIC

Transceivers

The 1000BASE-SX GBIC transceiver supports a direct connection to

62.5-micron or 50-micron multimode fiber-optic cable.

Table 1 shows the transmission ranges for each connection.

Ta b le 1 1000BASE-SX GBIC Multimode Transmission Ranges

Fiber Type

Multimode 62.5 160 2 – 220 (6.6 – 721.8)

Multimode 62.5 200 2 – 275 (6.6 – 902.3)

Multimode 50 400 2 – 500 (6.6 – 1640.5)

Multimode 50 500 2 – 550 (6.6 – 1804.6)

Diameter
(microns)

Modal Bandwidth
(MHz*km)

Transmission Range
in meters (feet)

The 1000BASE-LX GBIC transceiver supports these connections:

A direct connection to single-mode fiber-optic cable

■

Connection to multimode fiber through a conditioned launch cable

■

To ensure optimal performance, compatibility, and regulatory compliance,
use only conditioned launch cables that 3Com supports. For a list of
currently supported conditioned launch cables, see this 3Com Web site:

http://www.3Com.com/gigabit_ethernet/gbics

1000BASE-T-GBIC

Transceivers

Table 2 shows the transmission ranges for each connection.

Ta b le 2 1000BASE-LX GBIC Multimode and Single-Mode Transmission Ranges

Fiber Type

Multimode 62.5 500 2 – 550 (6.6 – 1804.6)

Multimode 50 400 2 – 550 (6.6 – 1804.6)

Multimode 50 500 2 – 550 (6.6 – 1804.6)

Single-Mode 9 – 2 – 10,000 (6.6 – 32,810)

Diameter
(microns)

Modal Bandwidth
(MHz*km)

Transmission Range
in meters (feet)

The 1000BASE-T GBIC transceiver supports connections over Category 5
cabling up to 300 meters (1000 ft.).

GBIC Transceiver Installation Guide 3

Safety Precautions Be sure to follow all safety precautions when you replace a GBIC

transceiver in the system. To avoid electric shocks and burns to yourself
and damage to the equipment, read and follow these warnings:

WARNINGS: When the system is on:

Never insert a metal object such as a screwdriver or a finger with

■

jewelry into open module slots.

Do not touch any connections inside the chassis with your hands or

■

fingers.

Fiber Safety Precautions

The GBIC fiber ports on your system use lasers. To ensure your safety
when you install or work with these GBIC systems, read and comply with
the precautions in this section.

WARNING: The fiber optic lasers used in 3Com GBIC ports meet the
regulatory requirements for casual exposure to the eye. As with any
source of bright light, however, 3Com recommends that you do not look
into the laser light source.

IEC 825, Class 1 Laser Devices are for connection only to Class 1 Laser
Devices. Multimode and single-mode fiber optic interfaces use lasers.

CLASS 1

LASER PRODUCT