AT&T System 85 manual Display button on 7407D only

7407D, Enhanced 7407D, and 7407 Plus Voice Terminals

Display

The 7407D, Enhanced 7407D, and 7407 Plus voice terminals are equipped with a built-in, 2-line, 40-character per line, liquid crystal display. The 7407D voice terminal has a standard, ‘‘twisted,’’ pneumatic display; the Enhanced 7407D and 7407 Plus voice terminals have a ‘‘super-twist’’ display.

DISPLAY button (on 7407D only)

This button is found only on the 7407D (7407D01B) voice terminal. It turns the display on and off.

Display Adjustment Control (on 7407D and Enhanced 7407D)

On the 7407D (7407D01B) and Enhanced 7407D (7407D02C) voice terminals there is a thumbwheel which adjusts the viewing contrast of the display.

Other Physical Features

Handset

The 7407D, Enhanced 7407D, and 7407 Plus voice terminals are equipped with an R-type handset.

Dial pad

The 7407D, Enhanced 7407D, and 7407 Plus voice terminals are equipped with a 12-button touch-tone dial pad. On the 7407 Plus (7407D02D) voice terminal the letters ‘‘Q’’ and ‘‘Z’’ have been added to the appropriate dial pad keys for directory access, and the ‘‘5’’ button on the dial pad has raised bars for visually-impaired users.

Jacks

The 7407D (7407D01B) voice terminal’s housing contains a Handset cord jack just under the left side of the housing, and a Line jack on the back of the voice terminal. There is an RS-232C con- nector on the optional data stand.

The Enhanced 7407D (7407D02C) and the 7407 Plus (7407D02D) voice terminals’ housing con- tains a Handset cord jack just under the left side of the housing and a Line jack and Speakerphone/headset adapter jack on the back of the voice terminal.

3-182