Mitel Aastra 470 System Manual page 128

R3.2
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Installation
Cable Requirements
Tab. 56
Cable requirements for FXO network interface
Core pairs  cores
Stranded
Wire diameter, core
Screening
Resistance
128
1  2
not required
0.4 ... 0.8 mm
not required
max. 2  250 
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014

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