JK Audio Interchange User manual

JK Audio
User Guide
Interchange™
Intercom Phone Bridge

Interchange™Intercom Phone Bridge
ii
Thank You
Thank you for purchasing a JK Audio Interchange™ 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,
call us M-F: 8:30am-5:00pm (CT)
In the US & Canada (Toll-Free)
800-552-8346 All other countries: 815-786-2929
Email us at:
[email protected]
Or check out our FAQ section for answers to common questions.
Warnings & Safety Precautions
• Read and keep these instructions.
• Follow all instructions.
• Clean only with a soft dry cloth.
• Refer all servicing to qualied service personnel.
• Heed all warnings.
Warning: Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including ampliers) that produce
heat.
Warning: 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.
Warning: 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.
To reduce the risk of re: Use only No. 26 AWG or larger
telecommunication line cord.
To reduce the risk of re or electric shock: Do not expose this
apparatus to rain or moisture.
Welcome

Contents iii
Contents
Overview 1
Getting to know your Interchange™
2Controls and Indicators
4Inputs & Outputs 2
Getting Connected
5Intercom
5Mobile Device
6Single Line Phone
7Multi-Line Phone
5
Operation 8
FAQs 9
Technical Information 10
Contents
Limited Warranty
The Interchange 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 modications, or damages occurred
in shipping, only defective workmanship or materials.
There are no expressed or implied warranties which extend beyond the
warranty here made.

Interchange™Intercom Phone Bridge
iv
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
Features
3.5 mm TRRS Headset Interface
Cable (Part# CN113) RJ50 Cable
(2) XLR Cables
What’s in the Box?

Overview 1
Introducing the Interchange™
Interchange allows remote access to your party line intercom through select
JK Audio POTS and VoIP phone 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. Likewise, couple a JK Audio PBXport™ with an Interchange™ for PBX/
VoIP lines, or connect a JK Audio AutoHybrid IP2™ for VoIP or AoIP connections.
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.
Interchange contains a sophisticated intercom hybrid in a low noise pro audio
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 O󰀨, On, or
Auto. Auto follows the phone hybrid Auto-Answer mode. Talk mode uses a solid
state relay to properly couple Talk audio from the phone line and mobile phone
interfaces, to the intercom channel.
The Innkeeper 2 and AutoHybrid IP2 conference features 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.
Overview

Interchange™Intercom Phone Bridge
2
Getting to Know Your Interchange
6
2 531
4
7 8 9 10 11 12
1 Talk Control
The position of the three position toggle switch determines when
Interchange will send audio into the Party Line intercom.
Up = Talk: Interchange sends and receives audio (simultaneously). Use this
position with the headset interface, or as a general purpose 4-wire interface.
Center = O󰀨: Interchange functions as a listen-only device. No audio will be
sent into the Party Line intercom.
Down = Auto: Talk function follows the hook state of the innkeeper
Phone Hybrid.
2 Intercom Channel
Up: Audio on Intercom Channel 1/A (Pin 2)
Down: Audio on Intercom Channel 2/B (Pin 3)
3 Talk LED
Indicates audio transmission into the Party Line intercom.
4 Power LED
Indicates intercom power detected.
5 COM Level LEDs
Indicates audio signal level from the Intercom channel. The 0dB LED
corresponds to a nominal level of -10 dBu on the intercom channel.
Controls & Indicators

Getting to Know Your Interchange 3
Getting to Know Your Interchange
Controls Cont’d
6 Phone Level LEDs
Indicates audio signal level from the phone interface.
7 Phone Hybrid Send Level
Adjusts audio signal level going to the phone hybrid / 4-wire interface.
8 Phone Hybrid Receive Level
Adjusts audio signal level coming from the phone hybrid / 4-wire interface.
9 Com Balance
Fine tuning for the intercom hybrid function. Optimizes separation
between send and receive when pushing audio into the intercom with the
Talk function.
10 Headset Interface Send Level
Adjusts audio signal level to the mobile device.
11 Headset Interface Receive Level
Adjusts audio signal level coming from the mobile device.
12 Headset Interface Jack
Connect to the headset jack of your mobile device with with supplied
CN113 interface cable.

Interchange™Intercom Phone Bridge
4
Getting to Know Your Interchange
1 5 63 42
Inputs & Outputs
1 Party Line Intercom Jack
Connect to one or two channel 3-pin unbalanced Party Line
intercom system.
2 Mix Out XLR Jack
Contains a line level mix of both the phone and intercom audio.
3 Line Out Jack
Line level audio output from the intercom to the phone hybrid or
audio device.
4 Line In Jack
Line level audio from the phone hybrid to the intercom.
5 Single Line Remote Jack
Connects to JK Audio single-line digital hybrids.
6 Multi-Line Remote Jack
Connects to JK Audio multi-line digital hybrids.

Getting Connected 5
Start by Connecting to the Intercom
1. Set the <Talk> switch to the <O󰀨> position, and the <Com> switch to the
desired channel.
2. Connect Interchange to your intercom network using one or both of the
<Intercom> XLR jacks.
3. As soon as Interchange becomes connected to the intercom system, the
<Power> LED will light, and the <Com> LEDs will indicate any audio signal
present on the intercom channel.
If using a Mobile Device (If using a phone line, please skip to page 6.)
1. Connect the supplied CN113 interface cable between the front panel
Headset Interface jack and your mobile phone headset jack.
2. Using your mobile phone, place a call to a remote location. You should be
able to immediately monitor the intercom signal from the remote location.
3. Adjust the <Headset Interface Send> level control for desired signal level
at the remote location.
4. Change the <Talk> toggle switch to the <Talk> position to allow the remote
location to be heard on the intercom channel.
5. The return audio path from the remote location into the intercom can be
adjusted two ways. The front panel <Headset Interface Receive> level
control provides adjustment suitable for most mobile devices. However,
most mobile devices also have a headphone level control which works
along with the Interchange controls.
6. It is best to set the headphone level on your mobile device rst, then set
the level on Interchange for nal adjustment. This signal will appear on the
Interchange <Phone> LEDs, not necessarily on the <Com> LEDs. Monitor
receive levels by listening on an intercom belt pack.
Com Balance with Headset Interface
Interchange features an active hybrid to separate the unbalanced 2-wire
intercom audio channel into separate (4-wire) send and receive audio paths.
While nominal separation is achieved with typical operation, the separation can
be ne tuned if the intercom loop o󰀨ers additional challenges. Perform the tuning
operation when the intercom network is not in use. Using your mobile device,
play or generate a xed level tone or white noise into the intercom system. Adjust
the signal level to 0 dB on the Interchange <Phone> LED display. Be sure that
the <Talk> control switch is in the <Talk> position. Adjust the <Com Balance>
control while observing the <Com> LEDs, to nd the minimum (the position
where the fewest <Com> LEDs are lit). Remove the test signal and proceed with
normal operation.
Getting Connected

Interchange™Intercom Phone Bridge
6
Single Line Phone Hybrids
Connect the supplied cables as follows for innkeeper LTD or innkeeper 1x/1rx:
1. Interchange <Line Out> XLR to the hybrid’s <Send> input XLR.
2. Interchange <Line In> XLR to the hybrid’s <Caller> out XLR.
3. Using the supplied 10 pin RJ50 cable, connect the Interchange
<Single-Line> Remote jack to the innkeeper <Remote> control jack.
4. Set the innkeeper rear panel <Send> level switch to <Line> level.
5. Connect the innkeeper to an analog phone line or VoIP analog phone
line port.
Getting Connected
Remote Control
Line OutMix OutIntercom Line In Single-Line Multi-Line
TM
JK Audio
Interchange
TM
PUSH PUSH
Remote
9 VDC
Center(+)
Line Phone
Caller
Auto
Answer Send
innkeeper LTD
JK Audio, Inc.
www.jkaudio.com
PUSH
innkeeper LTD
Phone Lines
Interchange
RJ-50

Getting Connected 7
Multi-Line Phone Hybrids
Connect the supplied cables as follows:
1. innkeeper 2: Line 1
a. Interchange (1) <Line Out> XLR to the hybrid’s <Send 1> input XLR.
b. Interchange (1) <Line In> XLR to the hybrid’s <Caller 1> output XLR.
c. Using the supplied 10 pin RJ50 cable, connect the Interchange (1)
<Multi-Line> Remote jack to the innkeeper 2 <Remote> control jack.
d. Connect innkeeper 2 <Line 1> to an analog phone line or VoIP analog
phone line port.
2. innkeeper 2: Line 2
a. Interchange (2) <Line Out> XLR to the hybrid’s <Send 2> input XLR.
b. Interchange (2) <Line In> XLR to the hybrid’s <Caller 2> output XLR.
c. Using another 10 pin RJ50 cable, connect the Interchange (1)
<Single-Line> Remote jack to the Interchange (2) <Single-Line>
Remote control jack.
d. Connect innkeeper 2 <Line 2> to an analog phone line or VoIP analog
phone line port.
Getting Connected
Remote Control
Line OutMix OutIntercom Line In Single-Line Multi-Line
TM
JK Audio
Interchange
TM
PUSH PUSH
Remote Control
Line OutMix OutIntercom Line In Single-Line Multi-Line
TM
JK Audio
Interchange
TM
PUSH PUSH
1
Remote
innkeeper 2 JK Audio, Inc.
Line
Line 2 Line 1
Line 1Line 2
Aux Line Aux
Caller Send Caller Send Master
Send
PUSH PUSH PUSH
100 -240 VAC
50-60 Hz, 2.5 A
1
Remote
innkeeper 2 JK Audio, Inc.
Line
Line 2 Line 1
Line 1Line 2
Aux Line Aux
Caller Send Caller Send Master
Send
PUSH PUSH PUSH
100 -240 VAC
50-60 Hz, 2.5 A
innkeeper 2
Phone Lines
Interchange (1)
Interchange (2)
RJ-50
RJ-50

Interchange™Intercom Phone Bridge
8
Operation with Phone Hybrids
1. Place the Interchange <Talk> switch in the <O󰀨> position. Apply power to
the phone hybrid and place a call from a remote location. You should be
able to immediately monitor the intercom signal from the remote location.
2. Adjust the phone hybrid Send level and Interchange <Phone Hybrid Send>
level controls for desired signal level at the remote location.
3. Change the <Talk> toggle switch to the <Auto> position to allow
Interchange to follow the call status of the phone hybrid. During an active
call, the remote location can now be heard on the intercom channel.
4. The return audio path from the remote location into the intercom can be
adjusted using the digital hybrid 'Caller' level and Interchange <Receive>
level controls. This signal will appear on the Interchange <Phone> LEDs,
not necessarily on the <Com> LEDs. Monitor receive levels by listening on
an intercom belt pack.
5. Changing the <Talk> switch to <O󰀨> returns the system to a remote
Listen-Only conguration.
Com Balance with Phone Hybrids
Interchange features an active hybrid to separate the unbalanced 2-wire
intercom audio channel into separate (4-wire) send and receive audio paths.
While nominal separation is achieved with typical operation, the separation can
be ne tuned if the intercom loop o󰀨ers additional challenges. Perform the tuning
operation when the intercom network is not in use. Using the Test Tone function
on innkeeper 1x or innkeeper 2, adjust the signal level to 0 dB on the Interchange
<Phone> LED display (innkeeper LTD does not have a test tone feature,
therefore an alternate tone generator must be used). Be sure that the <Talk>
control switch is in the <Talk> position. Adjust the <Com Balance> control while
observing the <Com> LEDs, to nd the minimum (the position where the fewest
<Com> LEDs are lit). Remove the test signal and proceed with normal operation.
Operation

9
1. Does Interchange work with any phone line hybrid besides
those listed in this user guide?
No. Interchange is only compatible with JK Audio Digital Hybrids.
2. I’ve lost my CN113 cable. Can I use any 3.5mm TRRS to 1/4”
TRS cable to use a cell phone with Interchange?
No. CN113 is specically designed to connect a smartphone to our product. If
you misplace this cable you will have to purchase a new one from us directly
or from an authorized dealer.
3. Can Interchange alone connect to a phone line directly?
No. Interchange can only connect to a digital hybrid.
4. Can I use Interchange with a VoIP line?
Yes. You can access a VoIP line by connecting Interchange to a JK Audio
AutoHybrid IP2.
5. How do I power up my Interchange? No power supply
was provided.
There is no power supply, Interchange is powered by the intercom. When it is
connected to the intercom system, the <Power> LED will light indicating that
it is receiving power.
6. Can I use the Interchange with both a cell phone AND a
phone line call at the same time?
Yes. The two calls will not be conferenced together so they would not hear
each other, but there could be some faint crosstalk through the intercom.
FAQs
FAQs

Interchange™Intercom Phone Bridge
10
Technical Information
Intercom Channel
Connection 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
Input
Balanced Female XLR 20k ohms / 500 mV RMS (-4 dBu nom) +12 dBu max
Output
Balanced Male XLR 200 ohms / 500 mV RMS (-4 dBu nom) +12 dBu max
Misc
Remote Control RJ50
Size 7.75” x 6.5” x 2.3”
Weight 2.1 lbs (960 g)
Specications

Technical Information 11
Technical Information
Interchange Block Diagram
JK Audio Interchange Simplified Block Diagram July 2, 2013
XLR Line
Input
Headset Interface
XLR Line
Output
Headset
Emulator
Intercom
Hybrid
1/A
2/B
Phone
Meter
Com
Meter
Control
Logic ON
OFF AUTO
RJ50: INN2
RJ45:INN1/INNLTD
Mix
Out
Intercom
Intercom
Hybrid / 4-Wire Interface
Remote
Control
Limiter
Talk Control
Send
Receive
Send
Receive

JK Audio, Inc.
1311 E 6th St.
Sandwich, IL 60548
United States
Telephone: [phone]
Toll Free: 1.800.jkaudio
Fax: [phone]
www.jkaudio.com
© 2019 JK Audio, Inc. All rights reserved.
Interchange™
Intercom Phone Bridge
User Guide Version 6/24/19
JK Audio