Safety
precautions and switch on
4.1
Safety precautions and switch on
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)
4-1
Summary of Contents for 2+8
Page 1: ...Installation and maintenance manual 2 8...
Page 2: ......
Page 36: ...Notes 10 2 Notes 10 3 TPU 1371Issue3 4 91...
Page 37: ...Notes TPU 1371Issue3 4 91 10 4...
