Turn Your Phone Line Into a Party-Line.Interchange LTD allows remote access to your party-line intercom system. This 1RU rackmount interface includes a digital hybrid for connection to analog (POTS) phone lines. The front panel headset interface jack allows easy connection to your wireless phone, tablet, or computer allowing remote access through a phone call or conferencing app. The front panel DTMF keypad and headset jack allow easy call setup.The internal digital hybrid connects intercom audio to a standard analog telephone line without the transmit/receive crosstalk common to analog hybrids. Its DSP continuously monitors both the phone line and audio signals to deliver excellent separation. This proprietary, dual-convergence echo canceller algorithm can achieve excellent separation, typically exceeding 50 dB, without any setup and without sending a noise burst down the line.Main Features:Male and Female 3 Pin XLR Intercom Loop JacksMale XLR Mix Line Out for MonitoringSend and Receive LED MeteringFront Panel Screwdriver Level ControlsFront Panel Channel SelectFront Panel Cell Phone InterfaceListen Always, Talk when Talk-EnabledEnable/Disable Auto-Answer16-bit DSP TechnologyFront Panel Off-Hook LEDSend and Caller Signal Level LEDsSpecifications:Intercom ChannelConnection: Male & Female 3-pin XLROutput Level: -10 dBu (250 mV RMS) nominalTerminating Impedance: 200 ohmsBridging Impedance: >15k ohmsPin 1: CommonPin 2: Audio + 30 VDC ( +12 VDC min ) 50 mAPin 3: Audio HeadsetInterfaceConnection: 3.5 mm TRRSFrequency Response: Wireless Interface 50 Hz – 7 kHz (HD Voice)OutputBalanced Male XLR:200 ohms / 500 mV RMS (-4 dBu nom) +12 dBu maxRinger: 0.8B RENIsolation: 1500 VACFrequency Response: Telephone Side 200 Hz – 3600 HzMonitor Headset Jack: 3.5 mm TRRSPower: 120-240 VAC Power Supply (included)Size: 19 x 5.4 x 1.75 Weight: 5.2 lbs