What Is The Xn120 Expansion Unit; System Capacities; Identifying The Expansion Unit - NEC XN120 User Manual

What is the XN120 Expansion Unit

The XN120 expansion unit is connected to the
XN120 main unit to increase the capacity of the
system.
The XN120 main unit must have the
Applications Card (EXIFU-A1) installed before
you can connect an expansion unit.
The system will allow up to 2 expansion units to
be connected to the XN120 main unit.
The expansion unit is supplied with three
exchange lines and eight telephone ports.
The quantity of ports can be increased by
adding optional expansion cards.
The expansion unit does not have the external
music input/external page output socket; this is only on the XN120 main unit. Additional external audio devices
are connected via the 2PGDU cards that can be installed into any unit.
It can also accommodate optional parts to connect ISDN BRI lines.
Separate guides are supplied with the optional equipment.

System Capacities

The maximum capacities of the XN120 system are shown below.
Other factors may limit the maximum quantity; refer to the individual guides supplied with each item.
Description
XN120 Main unit
XN120 Expansion unit
Exchange lines
Telephones
24 Button Add On console
64 Button console
Door phone unit
External paging zones
External music inputs

Identifying the Expansion Unit

The expansion unit looks identical to the main unit when the covers are fitted.
The units can be identified by the label on the left side of the unit.
The main unit is labelled IP2AT-924M KSU
The expansion unit is labelled IP2AT-924ME KSU
XN120 Expansion Unit Guide
Maximum Comments
Quantity
1
2
51 27 Analogue lines
40 BRI lines (20 circuits)
72 System phones, normal phones and 64 button consoles
72 Connects to a Vision phone
9 Connects to port 8 of each unit/card
6 2 per 2PGDU card
2 connections per 2PGDU card and 1 on the XN120 main
6
unit
XN120 Expansion Unit
3