Radwin 2000 - Page 230

RADWIN2000UserManual Release2.8.30 11‐3
RADWINHSS
•HSSClient‐ContinueTransmission(HSC‐CT):Iftheunitlosessynchronizationwiththe
HSSMaster,thelinkremainsactive.However,withoutsynchronizationpulses,itispos‐
siblethatthisunitwillcauseinterference.
•HSSClient‐DisableTransmission(HSC‐DT):Iftheunitlosessynchronizat ion withthe 
HSSMaster,thelinkisdropped untilthesynchronizationpulsesre sume.Thissetting
prev entstheunitfromcausinginterference.
TheremoteODUsthatarenotlocatedatthehubsite,arecalledIndependentUnits(INU).
RADWINofferstwotypesofHSS:
»SerialHSS
TheRADWINSerialHubSiteSynchronization(SHSS)methodusesacableconnected
fromthemas terODUtoallcollocatedODUs;thiscablecarriespulsessenttoeach
ODU,whichsynchronizetheirtransmissionwitheachother.SHSSiscoveredinChap‐
ter12.
» EthernetHSS
TheEthernetHSS(HSSoE)methodrequiresLayer2Ethernetconnectivitybetween
collocatedODUs.Ithastworequirements:
• Collocated ODUsprovidingEthernetservicesonly,shouldbeconnectedtoanIDU‐H
insteadofregularPoEdevices.Othersimpleswitchesmayworkwithdegradedper‐
formance.Theyarenotrecommendedandproblemsarisingfromtheirusewillnot
beeligibleforanykindofsupport.
• Collocated ODUsprovidingE1/T1servicesshoulduseanIDU‐CorIDU‐Eandthenbe
connectedtoanIDU‐Hfunctioningasaswitch.OneoftheLANportsontheIDU‐Cor
IDU‐EisconnectedtoanyofthesixIDU‐HPoEportsorthetwoLANports.(Thisis
possiblebecausetheIDU‐CorIDU‐ELANcableonlyusesfourpinsfordata;the
powerpinsarenotusedsothereisnoriskofdamagetothem.)Inthisway,upto
eightsuchODUsmaybecollocated.
Note
YoumayonlyuseoneIDU‐H.Thatis,theymaynotbecascaded.
Caution
IfyouareusinganIDU‐C0(GbE)itmustbeconnectedtotheIDU‐HLANport
only.ConnectingittotheP0Eportswilldamagetheunitandinanyevent,it
willnotwork.