250-watt power Inputs for 600-ohm balanced telephone line, Lo-Z balanced microphone, and background music Music input (RCA jack or screw terminals) Integral automatic level control (ALC) circuit for controlling pages made by persons with varying voice levels and paging techniques Page from telephone and/or microphone Signal-activated paging channel automatically mutes background music Adjustable background music muting level during a page Music gradually returns to its normal level after a page Audio Enhancement circuit increases intelligibility, improves perceived loudness (with no increase in power), and reduces listener fatigue Separate controls for page volume, music volume, night ringer, music mute, and Audio Enhancement Bass and treble controls Built-in night ringer activated by contact closure or by 90V ring signal Balanced or unbalanced 16-ohm, 25V and 70V outputs VOX sensitivity level control eliminates accidental transmission of background noise from a paging tel