NEC XN120 - 12- Power Fail Options

Power Fail Options
XN120 Expansion Unit Guide 39
12- Power Fail Options
There are various options available for power failure operation.
1. Plug a normal telephone directly into the exchange line socket.
If your exchange lines are provided with a normal telephone socket you can unplug the XN120 connection and
plug a normal telephone into the socket to make/receive calls.
You can plug a phone in each exchange line socket if you wish.
! Do not attempt to plug an XN120 system phone into an exchange line socket – you will damage the phone.
2. Use the power fail setting on the XN120.
This will require a normal telephone
connected to telephone socket ST8 of the XN120 expansion unit and an
exchange line connected to CO1.
You must set the power fail link (CN500) on the XN120 main board: see the diagram below.
Remove the sub cover of the XN120 expansion unit.
Loosen the two screws and remove the Main cover.
When Power Fail is set to ON (marked PF on the card):
When the power fails (or the XN120 is switched off) Exchange line CO1 is automatically connected to the
normal telephone plugged into socket ST8.
When the XN120 is powered on the telephone in socket ST8 will operate as a normal XN120 telephone.
You can not
use an XN120 system phone or 64 Button Console in socket ST8 with the power fail link set to PF.
IMPORTANT
You must be able to make outside calls in the event of a
power failure
Loosen the
two screws
Lift off
cover
Power fail ON
CN500=PF
Power fail OFF
CN500=KT