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* 0 dB = 1 V

Power Source 48 V DC (supplied from the IP intercom exchange (option))
Power Consumption 1.8 W (at rated), 2.4 W (max.)
Wiring Method Non-polar one pair stranded wire system
Transmission System 2 wire 160 kbps echo canceller transmission system
Signal Level Under 0 dB*
Speech Method Hands-free conversation
(Handset conversation can be established in conjunction with the RS-191 (option)).
Audio Frequency Range 300 – 7,000 Hz
Transmission Range Max. 1500 m (φ0.65 mm, Loop resistance 170 Ω)
Hands-free Speaker (accessory): 5.7 cm cone-type, 0.6 W, 8 Ω
Microphone (accessory): Omni-directional electret condenser microphone
Line Connection Terminal Pin header (2 pins)
Status Indicator LED Connecting Terminal Solderless connector (2 pins, male), voltage: 5 V, maximum load current: 5 mA
Dial Input Solderless connector (10 pins, male), open voltage: 3.3 V DC,
short-circuit current: 1 mA
External Dial Input No-voltage make contact input, open voltage: 5 V DC,
short-circuit current: 1 mA, screwless connector (5 pins)
Operation Temperature 0℃ to +40℃
Operation Humidity Under 90% RH (no condensation)
Dimensions 70 (W) × 185 (H) × 20.6 (D) mm
Weight 205 g (including accessories)
Accessory Removable terminal plug (2 pins, preinstalled on the unit) …1,
Handset jumper (8 pins, preinstalled on the unit) …1, Ferrite clamp …1,
Hands-free speaker (with connection cord) …1,
Hands-free microphone (with connection cord) …1
Option Option handset: RS-191