Facility settings for audio control: out-ringing : Normal ringing tones can be heard on the internal speaker [0] or on the internal speaker and an additional speaker connected to 'audio out' [1]. out-paging : Incomming announcements can be heard on the internal speaker [0] or on the internal speaker and an additional speaker connected to 'audio out' [1]. out-listening : Hands-free listening can be heard on the internal speaker [0] or on the internal speaker and an additional speaker connected to 'audio out' [1]. out-handsfree : Hands-free talking and system call exchange can be heard on the internal speaker [0] or on the internal speaker and an additional speaker connected to 'audio out' [1]. out-answ-mach : Call of messages of anwering machine can be heard on the internal speaker [0] or on the internal speaker and an additional speaker connected to 'audio out' [1]. headset : Setting this bit to [1] enables some automatic headset functions: acceptance AND headset are adjusted AND the user activates the auto call acceptance function key, the headset automatically answer the call trunk-line key OR extension key adjusted, pressing such a keys leads to automatically calling via headset handsfree-mute : Enable [1] or disbable [0] mute after handsfree calling. beep-negative-ack : Enable [1] or disbable [0] negative ack beep tone. beep-positive-ack : Enable [1] or disbable [0] positive ack beep tone. beep-call-waiting-repeat : Setting this bit to [0] means that the user is noticed onced. Setting this bit to [1], causes beep-tone of call waiting signal to be repeated.