3 Zone one way page control Provides tandem all call Background music input, automatically mutes in zonebeing paged Page override for special priority announcements Features are programmable per zone Built in tone generator for night ringing, time clock tone, doorbell Accepts pulse and tone dial Battery back up input UL listed To interface with analog extension or Centrexline add the VC V 9970 Access page port on selected telephone systems, PBX loop start or ground start trunk port, electronic or 1A2 line key line card required , or dedicated single line phoneset Input impedance 600 ohm Music sourceimpedance 4 to 600 ohm Music input level 10dBm nominal DC output 24 Vdc 500 mA Power requirements 230 Vac/.5A or 120 Vac/1A Weight 6.25lbs Dimensions 7.1H x 10W x 3D VALCOM POWER UNITS 20