Modem Power Supply Selection; Figure 4.2 - Lease Line Modem Power Connections - Siemens UTMC OTU Handbook

4.2.2 Modem Power Supply Selection

STEP
5 Set up modem power selection
The Processor card normally provides the modem power. Two voltage supplies are
available on this card: 5V (400mA) and 12V (1000 mA) connector PL3 as follows:-
:
Before connecting the plug into the modem with the unit powered up,
check with a multi-meter that the correct power supply selection has been
made.
Connection of MultiTech MT5634IND Lease Line Modem
Wire the fused power cable to plug 531/4/03539/000 and insert into CPU card
connector PL3. Check the voltage with meter before connecting to modem.
+12V to CPU PL3 socket 2
0 V to CPU PL3 socket 1
Figure 4.2 – Lease Line Modem Power Connections
Connect the modem line centre pair of wires (normally red and green) to the 2-wire
lease line circuit.
667/HB/31601/000
FUNCTION
Cableform Position
PL3 socket 3
PL3 socket 2
PL3 socket 1
Page 26
UTMC OTU/MOVA Handbook
REFERENCE
4.2.2
Voltage Supply
5V Supply
12V Supply
0V Supply
Issue 5