Dallas Delta Corporation Pty.Ltd.
Page 16
Power Over Ethernet (PoE)
WIRING
The DDC_VoIP telephone may be powered from the 2 way connector marked ‘Power’ on the
side of the unit, see page 19. The polarity to this connector must be correct for the unit to
function. (Note that NO damage will occur if it is connected incorrectly).
The voltage input to this connection may be from 9 to 48 Volts.
The alternative way to power the DDC_VoIP telephone is via the Ethernet connector using a
PoE switch.
The DDC_VoIP telephone is adapted to use a class 1 form of power source.
There are two methods that power can be supplied from a Ethernet Switch,
"
Mode A, supply power over the Tx/Rx pair, (TX pair pins 1&2 and RX pair pins 3&6).
"
Mode B, via the spare pairs 4&5 and 7&8.
pins
1
2
3
4
5
6
7
8
RJ45 Ethernet connector
pins
1 = TXP
2 = TXN
3 = RXP
6 = RXN
4,5 = Spare
7,8 = Spare
The figure above shows a typical RJ45 connector with the pins side facing up.
Note, In mode B, that the spare wires 4 and 5 are linked together within the PCB, the same for
pins 7 and 8.
The polarity on pins 4,5 or 7,8 is not critical and is generally set within the Switch, (if used).
The DDC_VoIP telephone is configure to draw power from the PoE in class 1 (0.44-3.84 Watt)
and should be connected to a IEEE 802.3af compatible PSE power unit .
mode A
PoE
mode B
PoE
