AT&T Spirit Communications System User Manual page 11

Line Button Used for placing and receiving outside calls. Incoming lines are the lines coming into your
system from outside, either local telephone company lines or lines from a PBX system.
Lines are numbered according to how they are connected to the system. All the lines in the 308/616
system appear in sequence on line buttons on all telephones in the system, from the bottom left.
Auto-Dial Button These buttons are pre-set to call the intercom extension numbers shown on the
buttons in the diagram on page 8. The lights next to these buttons also provide information about
telephone activity. The numbers are also pre-printed on the labels provided for those buttons.
Auto-dial buttons may also be programmed by you for one-touch dialing of a Personal SpeedCall
number. Buttons numbered 10 to 25 on a 24-button telephone in a 308/616 system are auto-dial
buttons and correspond to the Personal SpeedCall numbers 10-25. See page 32.
Programmable Button Buttons numbered 26 and 27 on a 24-button telephone may be programmed
to manually signal, page all intercom extensions, or page through a loudspeaker. See page 28.
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Line/Auto-Dial /Programmable Buttons