
The fiber optic cable interface connectors couple the fiber optic cables from the 9927
Distributed BTS outdoor cabinet with the fiber optic cables in the Hybriflex cable
The DC Distribution/Fiber Management Box must be located at the bottom of the tower,
within 20 feet of the 9927 Distributed BTS outdoor cabinet.
The requirements for the DC Distribution/Fiber Management Box are as follows:
•
Outdoor rated
•
UL listed
•
Contains six round holes for Hybriflex and 1-1/2 inch liquid-tight flexible metallic
conduit from the 9228 Distributed BTS outdoor cabinet.
•
Contains 48 fiber optic (LC connector) interface connectors (connect fiber optic cable
from Hybriflex cable to fiber optic cable from 9927 Distributed BTS)
•
Two DC surge protectors with the option to go up to four.
•
Contains 12 25 Amp, DC circuit breakers (can go up to 24)
•
DC terminal block
•
Must be Installed within 6.1 m (20 feet) of the 9927 Distributed BTS outdoor cabinet.
The block diagram below shows two 1–1/2 liquid-tight flexible metallic conduits and one
Hybriflex cable entering the DC Distribution/Fiber Management Box.
Optical links between 9927 Distributed BTS cabinet and RRHs
The optical links between the baseband cabinet and DC Distribution/Fiber Management
Box and DC Distribution/Fiber Management Box and RRHs are via multi-mode duplex
fibers: two fibers -- one for Transmit (Tx) and one for Receive (Rx). When connecting the
DC DISTRIBUTION/
FIBER
MANAGEMENT
BOX FOR FIBER
OPTIC CABLE
AND -48 VDC
9927 DISTRIBUTED
BASE STATION
OUTDOOR CABINET
HYBRIFLEX CABLE
BY OTHERS
ALCATEL-LUCENT
1-1/2 INCH LIQUID-TIGHT
FLEXIBLE METALLIC CONDUIT
WITH FIBER OPTIC AND -48 VDC
POWER CABLES
Hybriflex cable specifications
Requirements for Hybriflex cable
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9927 Dist BTS Outdoor
401-703-516
Issue 1
March 2012
Alcatel-Lucent – Proprietary
Use pursuant to applicable agreements
15-7