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Call Signaling:
Send: 20 kHz ±100 Hz, 0.5 Vrms ±10%
Receive: 20 kHz ±800Hz, 100 mVrms
Mic-Kill Frequency:
Send: 24 kHz ±100 Hz, 0.5 Vrms ±10%
Receive: 24 kHz ±800 Hz, 100 mVrms
Noise Contribution: less than -70 dB
Common Mode Rejection Ratio: greater than 50 dB
Connector type: One XLR-3M for each channel
Balanced Configuration Pinouts
Pin 1: DC/audio Common
Pin 2: Intercom audio low and +24 VDC output
Pin 3: Intercom audio high and +24 VDC output
Intercom Channel, Unbalanced Mode (BAL/UNBAL switch set to UNBAL)
Output Level: 2 Vp-p (750 mVrms)
Input Impedance: 200 Ohms ±10%
Bridging Impedance: greater than 10k ohms ±5%
Call Signaling:
Send: 11 ±3 VDC
Receive: 4 VDC minimum
Connector Type: One XLR-3M for each channel
Pin 1: Common
Pin 2: +30 ±1 VDC output
Pin 3: Intercom audio high
Expansion Input/Output
Connector Type: 1/8” Stereo phone jack
Tip: Talk output
Ring: Listen input
Sleeve: Common