Installation Guide

Table Of Contents

FinMInstallationGuide DQ0266070/A.01 1‐9

Synchronization Introduction

PoE

Power‐over‐Ethernetdevicescanbeusedtosupplybothpowerandnetwork

communicationstotheTBS,TMU,andtheOSU/ISU/GSUs.RADWINprovidesdifferenttypes

ofAC/DCPoEinjectorsinseveralpowerranges.

IfM12cablingmustbeusedonboard,aspecialPoE‐TMUcableisavailablefromRADWIN.

AlternativelyRADWINTBS/TMU/OSUcanbeconnecteddirectlytoastandard802.3at(PoE+)

device.ItisalwaysadvisedtoconsultwithRADWINprofessionalservicesforthebestpower

solutionforyourproject.

1.2.3Synchronization

• TheTBS'snetworkissynchronizedeitherviaGPS‐basedsystem(forabovegroundsce‐

narios)orviaEthernet‐basedsynchronization(foraboveorundergroundscenarios).

• ForGPSbasedsynchronization,theTBS’sintegratedGPSSynchronizationUnitisused.If

thisisnotpossible,theGSUcanbeused.

• Ethernet‐basedsynchronizationrunsoverthesameda ta backhaulnetwork.Theimple‐

mentationofthesynchronizationprotocolisviaanIndoorSynchronizationUnit(ISU)or

OutdoorSynchronizationUnit(OSU)thatisconnectedtooneofthenetworkswitches,

andprovidesthe masterclocktoallTBSsinthenetwork.

• OSUisafullyoutdoorunit

withanembeddedGPSantennaaswellasanexternal

GPSantennaport(tobeusedifanexternalGPSantennaisneeded),andcancon‐

necttothenetworkviafiberoptic.

• TheOSUandISUworkinthesamemanner,withoneimportantdifference:The

OSUcanreceiveaGPSsignalasthesynchronizationsource.

• UsingmultipleOSUsenablessynchronizationofaringtopology,eachOSUsynchro‐

nizingasectionofthering.

• Redundantsynchronizationunitsensurehigherresiliencyofthesolution.

• Withamixedtunnel/outdoorline,anOSUistypicallyusedinsidethetunnels,and

aTBSwithitsGPSisusedoutsidethetunnels.

OutdoorPoE IndoorPoE

PoEfortheTMU

(ruggedized,withM12connections)

Figure1‐11:PoEUnits

1. ItusesthesameformfactorastheTBS.

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