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8403 Voice Terminal
Important: You do NOT need to change any settings on the voice terminal for 2-wire or
4-wire installations. The voice terminal is able to detect whether it is in a 2-wire
or a 4-wire configuration.
For 2-wire operation, if you need to plug the voice terminal into a 4-pin or 6-pin
wall jack, instead of a standard 8-pin modular jack, refer to the ‘‘Line Interface’’
table to insure that the wires from the 4-pin or 6-pin wall jack are connected to
the correct pins on the terminal ‘‘LINE’’ jack.
In order for the terminal to function properly in either 2-wire or 4-wire installa-
tions, there must be NO INTERCONNECTIONS between the wire pairs used
for 2-wire and 4-wire operations. Bridging or paralleling of these pairs can
result in damage to the terminal or can cause the PBX circuit pack to remove
power to the terminal.
REMOVE ALL CONNECTIONS BETWEEN PAIRS BEFORE CONNECTING
THE TERMINAL.
4-WIRE installations MUST ONLY have PBX connections on pair 2 and
pair 3 and, if necessary, auxiliary power must be connected to pair 4.
2-WIRE installations MUST ONLY have PBX connections on pair 1 and, if
necessary, auxiliary power must be connected to pair 4.
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