| 摘要 |
<p>A paging system controller accessible from a plurality of input devices, such as an attendant's position, a telephone interface, and digital data communications devices, programmable to respond to signalling activity from accessing devices for a paging connection to audio/visual output paging in a plurality of paging zones served by the system. The paging signal functions include the transmission of audio tone and voice paging signals to energized paging loudspeaker amplifiers, the generation of one or more alert tones to a paging zone, talkback audio signalling from the paging zone to a telephone interface, the playback of prerecorded (audio/visual) messages from either or both of audio output (e.g. loudspeaker) and visual output (e.g. silent radio) devices. Respective access inputs to which the paging system controller responds are given user-programmable priorities of access permission, with a higher priority access input always being given preference over a lower priority access input.</p> |
