JK Audio Interchange LTD User Manual
JK Audio
User Guide
Interchange LTD
™
Intercom Phone Bridge + Digital Hybrid
Interchange LTD™ Intercom Phone Bridge + Digital Hybrid
ii
Thank You
Thank you for purchasing a JK Audio Interchange LTD™ Intercom Phone Bridge.
Please read this guide for instructions on setting up and using your new product.
Getting Assistance
If you have technical or application questions:
In the US & Canada, call us toll free at: 800-552-8346
All other countries dial: 815-786-2929 (M-F 8:30-5:00pm Central Time Zone)
Email us at: support@jkaudio.com
Or, check out our FAQ section for answers to common questions.
Limited Warranty
The Interchange LTD is covered by a 2-Year Warranty to be free from defective
workmanship and materials. To obtain service, contact JK Audio by phone or
email for return authorization. Once authorized, you will carefully pack and ship
the faulty product and all accessories to us. You will pay for shipping to us and
we will pay for return back to you.
This warranty does not cover damages due to accident, weather, re, ood,
earthquake, misuse, unauthorized repairs or modications, or damages occurred
in shipping, only defective workmanship or materials.
There are no expressed or implied warranties which extend beyond the
warranty here made.
Warnings & Safety Precautions
• Read and keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Clean only with a soft dry cloth.
• Do not install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including ampliers) that produce heat.
• Do not defeat the safety purpose of the three-prong grounding type plug.
If the provided plug does not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
• Do not use this unit if the electrical power cord is frayed or broken. The power
cord should be routed so that it is not likely to be walked on or pinched by
items placed upon or against it.
• CAUTION! To reduce the risk of re or electric shock, do not expose
this apparatus to rain or moisture. Use only No. 26 AWG or larger
telecommunication line cord.
• Refer all servicing to qualied service personnel.
Welcome
Contents
iii
Contents
Overview 1
Getting to know your Interchange LTD™
2 Controls and Indicators
4 Inputs & Outputs
2
Getting Connected
5 Intercom
5 Mobile Device
6
Single Line Phone
5
Operation 6
Technical Information 8
Contents
Interchange LTD™ Intercom Phone Bridge + Digital Hybrid
iv
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
Enable/Disable Auto-Answer
16-bit DSP Technology
Front Panel Off-Hook LED
Send and Caller Signal Level LEDs
Features
Universal Power Supply
with Detachable Cord
RJ11 Phone Cord
3.5 mm TRRS Headset Interface
Cable (Part# CN113)
What’s in the Box?
Overview
1
Introducing the Interchange LTD™
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 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.
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.
Ready to go?
The Interchange LTD controls and connectors are clearly marked and ready for
operation. If this is your rst exposure to a hybrid, we suggest that you read the
entire manual to allow you to take advantage of all these features.
Any Questions?
Before you pick up the phone… Please thumb through the rest of this manual.
You might nd those deep technical questions are covered on later pages.
Overview
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