NEC XN120 - Page 21

Connect the Power & Start Up
XN120 Expansion Unit Guide 21
Configuration sheet: Expansion Unit Port Assignment (base board ports)
Each expansion unit has 8 telephone (ST) ports and 3 exchange line (CO) ports.
XN120 unit
Slot
number in
Program
10-03-01
Telephone
port
numbers.
ST Sockets.
Exchange
Line port
numbers.
CO Sockets.
Slot 1
Base board
1-8 1-3
Main unit
Slot 7
Base board
Expansion
1
Slot 13
Base board
Expansion
2