Intercom Phone Bridge
JK Audio Interchange Front

The Missing Link.

Interchange allows remote access to your party-line intercom through JK Audio Innkeeper Series Digital Hybrids. This professional half rack interface provides a four wire audio interface and remote control connection for JK Audio innkeeper LTD, innkeeper 1x/1rx, or innkeeper 2 Digital Hybrids for POTS lines, or JK Audio AutoHybrid IP2 for VoIP lines. The front panel headset interface jack allows easy connection of your mobile phone, tablet, or computer allowing remote access through a wireless phone or conferencing app.

Learn More Details Specs

Product Details

JK Audio RA2

Rack Panel

This small desktop unit easily converts to a rack-mount unit using the optional RA2 Rack Panel. The RA2 holds 2 Interchanges in a 1U rack space.

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
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 / 4-wire connection 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.


The Innkeeper 2 or AutoHybrid IP2 conference feature allows two callers to share one intercom connection. Alternatively, the included cables allow Line 1 and Line 2 of the Innkeeper 2 or AutoHybrid IP2 to be connected to two separate Interchange™ units, allowing connection to separate intercom loops.

JK Audio Interchange 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 In Balanced Female XLR
Impedance 20k ohms
Frequency Response 50 Hz - 20 kHz
Level 500 mV RMS (-4 dBu nom, +12 dBu max)
Line Out Balanced Female XLR
Impedance 200 ohms
Frequency Response 50 Hz - 20 kHz
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)
Power Intercom powered +30 VDC (+12 VDC minimum) 50 mA
Size 7.6” x 5.3” x 1.5” (20 x 14 x 4 cm)
Weight 1.2 lbs (0.5 kg)