Panasonic DBS 40 Manual page 33

Section 300~installation
l
3-6.
CPC S&au Sl
Figure
Cut Sl for Pooled Trunks (PBX Operation)
Do Not Cut Sl for Line Appearances (KSU Operation)
l
Before installing the CPC card, determine if the DBS will be used as a
KSU or PBX. To use it as a PBX, cut Strap Sl on the CPC. Cutting this
strap allows use of pooled trunks as opposed to line appearances.
CPC-B
Install cards only in their dedicated slots. The slot type is marked on the
cabinet directly above each slot.
Chapter 3. Cabinet Installation