User's Manual

SystemDescription
6
Remote Gateway (RGW)
TheRGWisasmallunitsimilartotheBGWbutintendedforsmallsystemswherethereareonlyafewremotesor
wherethereisnoheadend.TheRGWhasaformfactorthatallowsittobemountedinsidearepeatercasing.
TheRGWcanbeuse
dtorunupto4RemoteUnitsfromasingleRepeateronasingleFiber.TheRGWhasthe
capabilitytoconnectnorthboundtoaCGW,justliketheBGW,anditcanalsoforwardalarmsthroughaVPNtunnel
toaCGW.
Thememoryca
pa
cityandfeaturesarereducedcomparedtotheBGWbutforasmallsystemwithasinglefiberthis
isanoption.
Inremotelo
cationswithoutEthernet,theRGWcanbeequippedwithamodemtoallowremoteaccesstothe
system.Typicallya3GmodemisusedallowingaVPNtunnelfromtheRGWtoaCGW,enab lingsupervision,
monitoringandcontrolofthesystem.
Headend
Theheadendconsistsofa19‐inchrackwithmodulesthatareselecteddependingonthesystemdesign.Generallyall
headendUnitscontain:
 Networkswitch‐connectscommunicationpathsbetweenthemodules
 InterconnectUnit(ICU)‐RFsplitter/combiner(rack‐mountunitormoduleintheMFU)
 MasterFrameUnit(MFU),maycontainsomeorallofthefollowing:
Powersupply
Ba
seStationInterfaceUnit(BIU)
Fiber‐OpticInterfacecard(FOI)
Repeater
ICU
ADHCPser
verbu
iltintotheRGWandBGWwillassignIPaddressestoalltheheadendsubunitsintherackandthe
RemoteUnitswhentheyareconnectedtothesystem.Theconfigurationisautomaticandcreatesaprotectedsub‐
netforthesystem.
DCS - Network Switch
ThenetworkswitchisanACpowered,24‐portswitchwithSpanningTreeProtocol(STP).Thenetworkswitch
providesanEthernetlinkbetweentheMFUandtheBGW.EachcardslotintheMFUhasadedicatedEthernetport,
eachportisconnectedtothenetworkswitchandthenetworkswitchisconnectedtoth
eBGW.
ADCpoweredopt
ionisalsoavailable.

Actualnetworkswitchmaybe
differentfromtheimage.