Mitel Aastra 470 System Manual page 153

Socket
The FOP fan-out-panel does not require a power supply; however in certain cases it
must be earthed.
Warning
If analogue trunk lines (FXO interfaces) are to be routed via the fan-out
panel FOP, for safety reasons the fan-out panel must be connected to the
protective earth (see
Copper wire
yellow/green
2,5 mm 2 protected
2
4,0 mm unprotected
FOP
Fig. 65 Connection of the FOP fan-out-panel to the protective earth
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
Fig. 65).
Installation
Aastra 470
Stranded copper
yellow/green
4,0 mm 2 unprotected
153