Microtest OMNIScanner2 Guide de l'utilisateur télécharger pdf (Page 95)

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OMNIScanner User Guide

Chapter 8  Fiber Optic Reference

Methods

Establishing the Reference

Different methods can be used when making a reference measurement with

OMNI

Fiber.

The reference measurement to use depends on how the

standard defines the link, and how the network is interconnected. There are

three basic link definitions and three corresponding reference methods.

Link Reference Multimode Single-mode Where Used

Definition Method Standard Standard

link = 2 cross 1 jumper method TIA-526-14A TIA-526-7 TIA-568-A, ISO 11801

connects + or equivalent Method B Method A.1 100Base-X,

cable plant 1000Base-X, ATM,

Fibre Channel, FDDI,

Token Ring

link = 1 cross 2 jumper method TIA-526-14A TIA-526-7 10 Base-X, TIA 455-

connect + or equivalent Method A Method A.2 171 Method B

cable plant

link = cable 3 jumper method TIA-526-14A TIA-526-7,

plant or equivalent Method C Method A.3

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Microtest OMNIScanner2 Guide de l'utilisateur Page 95