Interchange LTD

Intercom Phone Bridge
+ Digital Hybrid
JK Audio Interchange LTD Front

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.

Learn More Details Specs

Product Details

HD Voice Compatible (7 kHz Wide-Band Speech)
Male and Female 3 Pin XLR Intercom Loop Jacks
Male and Female 3-pin XLR 4-Wire 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
Intercom Powered
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

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.

JK Audio Interchange LTD Back


Intercom Channel Male & Female 3-pin XLR
Output Level -10 dBu (250 mV RMS) nominal
Terminating Impedance 200 ohms
Bridging Impedance >15k ohms
Pin 1 Common
Pin 2 Audio + 30 VDC ( +12 VDC min ) 50 mA
Pin 3 Audio
Line Out Balanced Male XLR
Impedance 200 ohms
Level 500 mV RMS (-4 dBu nom, +12 dBu max)
Headset Interface
Connection 3.5 mm TRRS
Frequency Response Wireless Interface 50 Hz - 7 kHz (HD Voice)
Phone Line RJ11C
Aux Phone RJ11C
Ringer 0.8B REN
Isolation 1500 VAC
Frequency Response Telephone Side 200 Hz-3600 Hz
Monitor Headset Jack 3.5 mm TRRS
Power 120-240 VAC Power Supply (included)
Size 19” x 5.4” x 1.75”
Weight 5.2 lbs