We have considerable experience providing public address or ‘tannoy’ systems in the industrial sector.  Invariably these are 100v line distributed sound systems and can be zoned with music and paging in one area and paging only in another.  When music and paging is required, we can provide volume controls for different areas to control the music level whilst maintaining full output for paging.  Paging can be provided by a desktop microphone or from a telephone interface allowing paging from any telephone.