- Bogen 100 watt wall-mounted telephone paging amplifier- 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 retu