AT&T System 85 manual 288

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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