Features Record time expandable from 1 to 4 minutes per channel or configured as a 12 minute single channel announcer Record 1, 2, or all 3 channels simultaneously Programmable ring delay Detects C.P.C. signal and disconnects Messages stored in Non-volatile memory (no batteries required) Record and review announcements locally with a carbon handset or a tape player Remotely record by calling into the unit from a touch tone phone Recognizes handshake signals from virtually any PABX, Centrex or C.O. Provides both "Ring Trip" and 4 wire "E & M" interface Recording volume level LED indicator for consistent high-quality recordings. Specifications Power: 12OVAC/12VDC 5OOmA UL listed adapter provided or power from 48VDC 0.1 A maximum power source Message Length: 1 minute/channel, field expandable to 2, 3, or 4 minutes/channel using model ERAM-60 memory kits (each kit adds 1 minute to one channel) Interface 1: Standard ring-trip with adjustable ring delay Interface 2: 4-WIRE E & M with 600 ohm audio switch selectable protocol Environmental: 0 degC to 32 degC (32 degF to 90 degF) with 5% to 95% non-condensing humidity Dimensions: 48cm x 20cm x 4.5cm (19" x 8" x 1.75") Sampling Rate: 64 K (equivalent)