Extension Expansion Card Connections - BT Inspiration Installation & Maintenance Manual

Extension Expansion card connections

There are two sets of four jumpers on the extension expansion card, which provide ISDN/S-Bus setup
options when an ISDN expansion card is connected into slot 9.
The four jumpers at the back of the RJ45 connector (J1,J3, J4 and J2) must be moved to the S position
for So operation. In default the jumpers are set in the T position for To operation.
When changing the jumper settings from the default position, the system must also be programmed
from T to S operation. See the owners manual for the programming details.
There are four jumpers beside the RJ45 connector. JP-2 and JP-1 are the 100 ohm terminating
resistors (connected in default mode).
The expansion board ISDN interface can provide a 40 Volt supply to connected ISDN devices. Up to
four devices (maximum) can be powered by this 40 Volt supply, on each S-Bus. The option to provide
or remove this voltage supply is available on the extension expansion board by inserting or removing
jumpers. Please see the following diagram.
JP-1
Terminating
Resistor
Position A 100 Ohm out
100 Ohm in
Position B
JP4 JP3 JP1 JP2
To/So
Select
JP-2 JP-3
Terminating ISDN So 40V
Resistor Supply
100 Ohm out No So 40V
100 Ohm in 40V supplied
Page 22
Position B
Position A
J1
J3
J4
S
T
J2
JP-4
ISDN So 40V
Supply
No So 40V
40V supplied