Baldwin Boxall BT8 Operating Instructions Manual - page 5
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Issue 9
FIG. 1 - Connecting to a 2 wire analogue extension port
Ensure that LK1 and LK2 are fitted and with selector switch SW1, set 4 to off.
Note: it may be necessary to move LK6 to the 2W position for
European / International telephone
systems or some ISDN digital adapters
FIG. 2 - BT8 Connections to a paging port
When the BT8 is interfaced with a paging port, certain steps have to be taken to reconfigure the unit.
Remove links LK1 and LK2. Then reposition the links onto links LK3 and LK4. On selector switch
SW1, select 4 ON.
PLEASE NOTE
The BT8 is not approved for direct connection to the British Telecom network and therefore must
never be directly connected. However under general approval NS/G/23/J100003 it may be connected
to a port of a telephone switch (PABX).
3
1
2
5
Two wire analogue
extention port on
telephone switch
Line Jack
Master Unit
Connection using
6
4
1 2 3 4 5 6
3
1
2
5
Speech Line
Line Jack
Slave Unit
Connection using
6
4
1 2 3 4 5 6
20-50V DC
APPROVED SUPPLY
FROM TELEPHONE
SWITCH
Contact closes
when paging port
is selected
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