Microphone Pre-Amplifier
Mic to Line (without limiter acting)
Frequency Response: 280 – 15k Hz ± 3dB
Microphone output to line – Audio Level (-50dBm Electret input): -9dBm
Microphone output to line – Distortion: <0.1%
Microphone output to line – Signal to Noise: >65dB

Headphone Pre-Amplifier
Frequency Response – Line to Headphone: 150 – 20k Hz ± 3dB
Headphone input from line – Audio Level (-9dBm Electret input): 3.5dBm
Headphone input from line – Distortion: <0.5%
Headphone input from line – Signal to Noise: >50dB
Earphone to Mic – Crosstalk: >80dB
Sidetone – Adjustment Range (-80db mic input): >45dB

Keypad Indicators
Power: Green LED
Talk: Green LED
Call: Orange LED

Connectors
Intercom Line: (2) 3-pin XLR–M–F
Ch. 1 2-Wire

Intercom Channel
Pin 1: Common
Pin 2: PL Power (+28VDC)
Pin 3: Line (Audio)
Headset: 4-pin XLR–M

Headset Connector
Pin 1: Mic – (Mic Common)
Pin 2: Mic +
Pin 3: Spkr-
Pin 4: Spkr+ (and 0.5*VCC DC, supply between
Pin 4 and Pin 1)

Power
Input Voltage Range: 12-30 VDC
Input Current (Idle): <=12mA
Input Current (Max): <=28mA

Call Voltage
16.5 VDC
Minimum Voltage Needed: 3.3V

Environmental
32˚F – 158˚F (0˚C – 70˚C)

Dimensions
3.4 x 4.5 x 1.7 in (HxWxD)
(86 x 114 x 43 mm)

Weight
10.5 oz (0.30 kg)

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