NEC Xn120 Getting Started Manual page 13

Connecting the Normal Phones
Use the line cord supplied.
OR
Use the RJ11 to bared wire
cables (supplied with the
Xn120) and Line Jack Units.
Connections:
Xn120
ST socket
3 red
4 green
! The connections are not
polarity sensitive.
! Ensure that you use a twisted
pair for the speech:
Pins 3 & 4 (speech)
This will ensure that you can
reach the maximum cable
length of 1125 metres.
! Identify each line jack unit
with its connection number
(ST1 to ST8). This will help
you configure the system later.
Route the cables into the lower
side of the system. Use cable
ties to secure the cables.
Xn120 Getting Started Guide
The normal phones can be connected to any of the eight RJ11 telephone sockets
labelled ST1 to ST8 on the Xn120.
The Xn120 is supplied with RJ11 to bared wire cables for connection to optional
distribution frames.
! Check Power Fail Operation later in this guide, ST8 can be used to provide a
working telephone should the power be disconnected from the Xn120.
If the line cord supplied with the telephone has an RJ11 plug it can be
plugged directly into the RJ11 sockets labelled ST1 to ST8 in the
Xn120 unit.
If you need to extend the telephone cables:
Fit a Master type Line Jack Unit (LJU) at the location the telephone is
required, run a telephone cable back to the distribution frame. Connect
to one of the sockets labelled ST1 to ST8 using one of the RJ11 to
bared wire cables supplied.
·
Ensure that you connect the 2 wires as shown otherwise the
telephone will not operate correctly.
· Use CW1308 or similar telephone cable.
· Maximum cable length is 1125 metres (with 0.5 mm diameter
conductor).
LJU socket
2
5
See diagram on page 12.
Connect the Telephones
4 3
Xn120 RJ11
socket
(ST1-ST8)
4 3
RJ11 plug
1125 metres
max.
LJU socket
located near
telephone
13