Installation Guide

Table Of Contents

HAPTER

| Making Network Connections

Fiber Optic SFP Connections

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FIBER OPTIC SFP CONNECTIONS

Each of the optional SFP transceivers on the switch’s front panel can connect

directly to a CPE at the subscriber’s premises. The transceiver ports require

multimode duplex fiber optic cable with an LC connector at the switch end. The

connector used at the other end of the cable depends on the target device.

When connecting to a CPE, the fiber cable is normally hard-wired directly to the

unit. When connecting to another switch or networking device, an LC connector

is required.

Each 1000BASE-LX/LH single-mode fiber port requires 9/125 micron single-

mode fiber optic cable. Each 1000BASE-SX multimode fiber optic port requires

50/125 or 62.5/125 micron multimode fiber optic cabling. 1000BASE-SX/LX/LH

uses duplex fiber, operating at the same wavelength for both transmit and

receive signals (SX: 850 nm, LX: 1310 nm, LH: 1550 nm). Each 100BASE-FX

single-mode fiber port requires 9/125 micron single-mode fiber optic cable.

1. Remove and keep the fiber port’s rubber cover. When not connected to a

fiber cable, the rubber cover should be replaced to protect the optics.

2. Check that the fiber terminators are clean. You can clean the cable plugs by

wiping them gently with a clean tissue or cotton ball moistened with a little

ethanol. Dirty fiber terminators on fiber cables will impair the quality of the

light transmitted through the cable and lead to degraded performance on

the port.

3. When running cable to a subscriber, connect one end of the cable to the LC

connector on one of the switch’s SFP transceivers and the other end to the

CPE at the subscriber’s premises. Most CPEs require the fiber cable to be

hard-wired to the device with an internal splice, which should only be done

by trained service personnel. When connecting to another switch or

ARNING

This switch uses lasers to transmit signals over fiber optic

cable. The lasers are compliant with the requirements of a Class 1

Laser Product and are inherently eye safe in normal operation.

However, you should never look directly at a transmit port when it is

powered on.

ARNING

When selecting a fiber SFP device, considering safety, please

make sure that it can function at a temperature that is not less than the

recommended maximum operational temperature of the product. You

must also use an approved Laser Class 1 SFP transceiver.