- 3 Zone talkback analog page control - Provides tandem all call - Background music input, automatically mutes inzone being paged - Page override for special priority announcements - Features are programmableper zone - Built-in tone generator for night ringing, time clock tone, doorbell - Accepts pulseand tone dial - Supports up to 2 talkback speakers and 40 one-way speakers per zone - Battery backup input - UL listed - Access: page port onselected 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: 6.25lbs - Dimensions: 7.1"H x 10"W x 3"D - VALCOM POWER UNITS (+10)