AT&T System 85 manual Speakerphone Listen and Speak Feature, Mute button

7444 Voice Terminal

Speakerphone (Listen and Speak) Feature

The 7444 voice terminal is equipped with a built-in S201A-type speakerphone. The Speaker- phone capability allows a user to engage in a hands-free 2-way conversation with the far-end party. The speakerphone can be turned off or on with the SPEAKER/RESET SPKR button, can be muted with the MUTE button, and the volume can be controlled with the VOLUME ‘‘arrow’’ button.

The SPEAKER/RESET SPKR button also allows the user to adjust the speakerphone for optimal performance. By pressing the SELECT button and then the SPEAKER/RESET SPKR button (if the voice terminal is set for the Speakerphone feature), the user hears a set of tones as the speakerphone performs an acoustic test of the environment. When the tones stop, the speaker- phone has finished adjusting itself and is ready for use. The user should reset the speakerphone whenever the voice terminal is moved to another place (even in the same room), whenever the green light next to the SPEAKER/RESET SPKR button is fluttering, and in the unlikely event that the speakerphone is making a squealing sound (in this last case, tones will not be heard during a call).

Speaker (Listen-only) Feature

The 7444 voice terminal can be optioned for the Speakerphone (listen and speak) or the Speaker (listen-only) feature. Use the SPEAKER/RESET SPKR button on the front of the voice terminal for turning on and off the speaker or speakerphone.

The voice terminal is shipped with the Speakerphone setting in place, but, the necessary DIP switch setting can be changed so that the voice terminal operates with the Speaker feature instead. In this case, the S2 switch should be set to the ON position, so that the voice terminal will operate with the Speaker (listen-only) feature.

The Speaker (listen-only) capability allows a user to engage in a one-way conversation with the far-end. Specifically, the user can only listen to the far-end; the user is not able to transmit his voice over the speaker. To speak with the far-end, the user must use the handset which turns off the speaker.

MUTE button

The MUTE button disables the transmitter of the speakerphone or the handset depending on which is activated at that time. A red light next to the MUTE button goes on when the Mute feature is activated.

VOLUME control button

The 7444 voice terminal has a VOLUME ‘‘arrow’’ button. This button has a double function. When the user is on a call, the VOLUME button controls the volume of the speaker or speaker- phone, whichever is being used; when the user is not using the speaker or speakerphone, the

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