2.4 Installation of Optional Cards and Units
2.4.1 Location of Optional Cards and Units
The location of the optional cards and units is shown below.
Precaution
To protect the printed circuit boards (P-boards) from static electricity, do not touch parts on the
P-boards in the main unit and on the optional cards.
Expansion Units
The following expansion units can be installed to any of the three expansion areas.
Expansion
area 3
Expansion
area 2
Expansion
area 1
Expansion Unit
Connectors
Installation Manual
A1232
Remove the cover
plate(s) on the
front cover.
Max. two extension line units
8 Extension Expansion Unit,
KX-TA123270
One outside line unit
4 CO Line Expansion Unit,
KX-TA123280
General Installation
57