6 Zone talk back analog page control Provides tandem all call Background music input, automatically mutes inzone being 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 Supports up to 2 talk back speakers and 40 one way speakers per zone Battery back up input UL listed 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 phone set Input impedance 600 ohm Music source impedance 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 10lbs Dimensions 10.25H x 13W x 2.63D VALCOM POWER UNITS 30