Cortelco 8012 - Manual (Page 17)

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Up/CID Key - Scrolls up through list and menu options. Increases the receiver or
speakerphone volume during a call. Enters the CID book as described on Page 18.
Down/Phonebook Key - Scrolls down through list and menu options. Decreases the
receiver or speakerphone volume during a call. Enters the phonebook as described
on Page 26.
Left/Int Key - Set up an intercom call to another handset. Transfer a call to another
handset. Set up a conference call with an external line and an intercom handset.
Right/Redial Key - Enter the redial book as described in Page 16. Insert a pause
when pre-dialing.
Navigation Key