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SK-FFT Installation and Operation Manual
6.2
LED Operations
6.2.1
Power Status LED
The Power Status LED is located on the left side of the FFT board. On Power-UP the
Power Status LED will blink at a 50% on/off rate until FFT initialization is complete
(which takes approximately 20 seconds). Once initialization is complete the Power
Status LED will blink at a 10% on and 90% off rate.
No key input will be valid until the FFT completes its initialization.
6.2.2
Answer
When a Remote Handset connects to the audio channel the Answer LED will blink
and the PZT will sound. The operator at the FFT then picks up the local handset and
presses the Answer Switch which causes the Answer LED to remain on solid and the
PZT goes silent. Communication between the local and remote handset is now
established. Additional remote handsets can be attached to the audio connection
without any intervention at the FFT. Once the last remote handset has disconnected
from the FFT, the answer LED will go blank and the system will be back to normal.
6.2.3
Power
The Power LED indicates that 24 VDC is connected to the FFT.
6.2.4
Local Handset Trouble
The local handset trouble LED will activate and blink when there is a problem with the
local handset.
6.2.5
Remote Handset Trouble
The remote handset trouble LED will activate and blink when there is a problem with
the phone circuit.
6.2.6
General Trouble
The General Trouble LED will blink active when system troubles are detected. When
the Silence Key is pressed, the General Trouble LED will become constant. Once all
system troubles have been restored, the General Trouble LED will deactivate.
6-2
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