9
Galaxy 2 Series Installation Manual
Connecting the Galaxy 2 Series to the PSTN
The Telecommunications Network Voltage (TNV) port (terminals A and B on TB1) must be permanently
connected (hard-wired) to the PSTN via a BT master socket, refer to Figure 3.
Note: If the BT master socket is the newer type (NTE5/CTE5), then the connection can be carried out by the
installation engineer. If the BT master socket is not an NTE5/CTE5, then the network operator must make the
connection.
Figure 3. Connecting the Galaxy 2 Series to the PSTN
NOTES: 1. Terminals 2 and 5 on the BT Master Socket must be hard-wired to the A and B terminals
(TB1)on the Galaxy 2 Series PCB. The connection is polarity independent.
2. It is strongly recommended that the Galaxy 2 Series panel is the only device on the line.
3. If another device is to be connected to the line, connect the PHONE terminals on the PCB
to terminals 2 and 5 on a second BT Master Socket and connect the additional devices to
the second socket.
Using cable suitable for connection to 2.8 mm diameter screw terminals, strip back approximately 20 mm of
the outer sheath and then remove approximately 4 mm of the insulation from the wires to be connected to the
Galaxy 2 Series.
Connect terminals 2 and 5 on the BT Master socket across the A and B terminals (TB1) on the Galaxy 2
Series, see Figure 3.
Private Branch Exchange (PBX) Approval
The Galaxy 2 Series may be used with some analogue PBX exchanges. The correct operation of the Galaxy
2 Series cannot be guaranteed under all possible conditions of connection to compatible PBXs.
System Wiring (cont’d)
Incoming
PSTN
Line
A B
Galaxy 2 Series PCB
PHONE
TB5
2
5
2
5
BT Master socket (
NTE5
/
CTE5
).
BT Master socket (
NTE5
/
CTE5
).
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