Polycom spectralink scd408 User Manual

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SpectraLink 6100 MCU: Installation and Operation: SpectraLink 6000 System 
PN: 1725-36097-001_J.doc 
18 
Determine the amount of wire needed to connect the Base Station to 
the MCU by scaling from a floor plan or a sketch, pacing, measuring, 
or estimating. Remember to include enough wire to reach the ceiling.  
 
The wire length between the MCU and each Base Station may not 
exceed 2,200 cable feet.  
Install an extra 25 feet of wire at the Base Station to allow for 
possible relocation. 
Pull Cable 
Pull the cable from the MCU location (usually in the telephone 
equipment room) to the Base Station locations designated on the floor 
plans. 
 
If the cabling exits the building, consult the telephone system 
manual, the National Electrical Code (NEC), and local codes for 
instructions on providing lightning and other over-current protection. 
When cabling an external Base Station or a Base Station with 
wiring that exits the building, protect all Base Station wiring with the 
Quick Clip Fuse (Illinois Tool Works, Linx Division, SCP-2X2) 
before bridging with other Base Station power leads. 
Run all cable before attaching the RJ-45 connectors to the Base 
Stations. Label both the demarcation block end and the Base Station 
end of each wire with the Base Station number using a wire tie marker 
or other form of marker.  
 
Remove bridge taps, multiples, or “Y” connections to the Base 
Station wires; these will cause data transmission errors. 
The area above some suspended ceilings is used as an 
environmental air plenum. The NEC requires that wire installed in 
plenums be rated for plenum installation.