Polycom spectralink jpi300 Manual De Usuario

Site Preparation 

PN: 1725-36122-001_M.doc 

27

Polycom recommends UL-listed wire that conforms to the following 
specifications for AWG, distance, and number of power pairs 
required for this installation. 

1 6,000 3,800 2,400 
2 N/A 6,000 4,800 
3 N/A  N/A 6,000 

 

 

One additional pair is also required for Data. 

For wire runs of less than 3,500 feet, attenuation must not exceed 
6.8 dB/1,000 feet at 772KHz. 
For wire runs between 3,500 and 6,000 feet, attenuation must not 
exceed 4.5 dB/1,000 feet at 772KHz. 

Wire that is already installed (spare house cable) can be used when it 
is available. House cable will usually run from the MDF in the 
telephone equipment room to intermediate distribution frames (IDFs) 
spread throughout the facility. Install new wire from the closest IDF 
to the Base Station. Be sure no bridge taps, multiples, or “Y” 
connections are created or present. 
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 6,000 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, refer to Chapter 6, section Install 
Outdoor Base Stations