Panasonic KX-NS500 - Mother Board in an Expansion Unit

4.3.1.2 Mother Board in an Expansion Unit
Function
The mother board of an Expansion Unit is the pre
-installed processing board with the EXP-S card, PFT card,
MCSLC16 card.
To EXP-M
LED
EXP-S CardPFT4 + MCSLC16 Card
EXP-S Port
LED Indication
Indication Colour Description
STATUS Off Power Off
Green On On Line
Green flashing (60 times per minute) Starting Up
Green flashing (120 times per minute) EXP-S card Programme error
Red On On Line with Alarm
Red flashing (60 times per minute) OUS (Out of service)
Installation Manual 123
4.3.1 Mother Board