Installation Guide

Table Of Contents
FinMInstallationGuide DQ0266070/A.01 17
MajorComponents Introduction
OSU
OSUs(OutdoorSynchronizationUnit),encasedinasimilarformfactorastheTBSs,are
outdoordevicesthatreceiveaGPSclocksignalanddistributesthisoverthewaysidenetwork.
TheOSUsareconnectedtooneofthewaysidenetworkswitches.IfthereisaGPSfailure,the
OSUsactasanISUandprovidetheinternalclocktotheTBSs.
Figure18:OutdoorSynchronizationUnit
FOR REGULATORY REVIEW