User's Manual Part 1

FiberDistributedAntennaSystem(FiberDAS)
13
Interconnect Unit (ICU)
Interconnectunits(ICU)areusedtocouplesignalsbetweentheBIUsandtheFOIs.
Thefunctionalpu
rposeoftheICUis:
 Downlink‐SplitthesignalfromtheBIUandroutethebalancedsignals(minusinsertionloss)totheFOIs.
 Uplink‐CombinethesignalsfromtheFOIsandroutethesum ofthesignals(minusinsertionloss)tothe 
BIU.
TheRFportsontheICUar
eQMA.
Figure 8 Interconnect Unit Signal Flow
Base
Station
Base Station
Interface
Interconnect
Unit
Fiber-Optic
Interface Units
Fiber-Optic
Cables
to
Remote
Units
(Antenna)
Master Frame Unit
FOI
FOI
FOI
FOI
ICU
BIU
MFU ICU
TheMFUICUsar
eavailableinseveraldifferentconfigurationstosupportavarietyofsystemconfigurations.
Theseunitsar
einsertedintotheMFUandprovidesignalroutingtoandfromtheBIUsandFOIs.
Figure 9 MFU ICU