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8434 and 8434DX Voice Terminal
Power Requirements
The 8434 and 8434DX voice terminals are phantom-powered from the system cabinet on the
digital pairs of the line wiring.
In order to use the display on the 8434 or 8434DX voice terminal or, with the 8434DX, connect
and use an 801A expansion module, you must connect an auxiliary power source to the voice
terminal. An MSP-1 Power Supply is the recommended local power supply; the 1145A and
1145B1 are recommended bulk power supplies.
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