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Safety precautions and switch on
4.1
Before switching on ensure that:
The mains plug is fused with a 3A cartridge fuse.
•
There is a reliable earth at the mains supply socket earth pin by testing
•
with a 13A socket earth continuity tester.
All four DIL switch banks and line voltage links have been correctly set.
•
All equipped extensions have a telephone or a Systemphone connected.
•
The CCU cover has been replaced.
•
Switch on the mains power and allow at least 15 seconds for the CCU to
•
go through its power up routine. At first the Systemphone LEDs will all
light up, and eventually the line LEDs will be extinguished.
When the 2+8 is in an idle state all LEDs on System phones should be
•
extinguished. If the exchange line LED (s) remain on, this means that
either the exchange line port(s) do not have lines connected or the line
voltage feed straps may need to be set.
WARNING
Disconnect mains supply before removing CCU cover.
TPU 1371Issue3(4/91)
Safety precautions and switch on
4- 1
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