Interchange LTD - Intercom Phone Bridge + Digital Hybrid

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.

Listen-Always Design

The Listen-Always design allows both the phone hybrid and the mobile phone headset interface to monitor the intercom just like any other belt pack. Listen mode is a high impedance bridging tap on the intercom line. Talk mode is enabled via a front panel switch, either Off, On, or Auto. Auto follows the phone hybrid Auto-Answer mode.

Digital Hybrid

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.


  • HD Voice Compatible (7 kHz Wide-Band Speech)
  • Male and Female 3 Pin XLR Intercom Loop Jacks
  • Male XLR Mix Line Out for Monitoring
  • Send and Receive LED Metering
  • Front Panel Screwdriver Level Controls
  • Front Panel Channel Select
  • Front Panel Cell Phone Interface
  • Front Panel TRRS Monitor Headset Jack with Volume Control
  • Listen Always, Talk when Talk-Enabled
  • Auto-Answer
  • 16-bit DSP Technology
  • Front Panel Off-Hook LED
  • Send and Caller Signal Level LEDs
  • DTMF Keypad with Redial
  • Rack Mountable
  • Made in America
  • Approved for Sale in Europe