JK Audio Innkeeper 2, Innkeeper 4 User Manual
JK Audio
User Guide
innkeeper 2/4
™
Digital Hybrid
ii
innkeeper 2/4™ Digital Hybrid
Thank You
Thank you for purchasing a JK Audio innkeeper 2/4 Digital Hybrid. 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 innkeeper 2/4 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.
• To reduce the risk of re or electric shock, do not expose this apparatus to rain
or moisture.
• Refer all servicing to qualied service personnel.
Welcome
Contents
Overview 1
Getting to know your innkeeper 2/4
2 Controls & Indicators
4 Inputs & Outputs
2
Remote Terminal Block
5
Getting Connected
6
Menu Navigation
8
Serial Port Interface
10
Conference
12
Optional Remote Control 13
FAQs 14
Technical Information 15
Contents
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Contents
iv
innkeeper 2/4™ Digital Hybrid
16 bit DSP Technology
Auto-Answer (Switchable On/Off)
Proprietary Auto Null Algorithm
(50 dB null)
Conferencing (innkeeper 2 only)
1 kHz Tone Generator
Menu with Backlit LCD Display
Alpha-Numeric Keypad
Memory/Speed Dial
Send XLR Line Inputs (2/4)
Master Send XLR
Caller XLR Line Outputs (2/4)
Monitor Handset Jacks
Remote Control via RS-232
RIU-IP Remote IP Interface
Send and Caller Signal Level LEDs
Send and Caller Volume Controls
Features
Detachable North American
Power Cord
CN081 Serial Port Cord
RJ11 Phone Cord
What’s in the Box?
Features
Overview
1
Introducing the innkeeper 2/4™
Innkeeper 2 and innkeeper 4 will allow you to send and receive audio over
analog telephone lines. While this may seem like a simple task that any
telephone can do, the challenge is getting the best quality audio from such a
miserable audio path.
What is a Digital Hybrid?
The innkeeper 2/4 digital hybrids connect audio signals to a standard analog
telephone line without the variations in quality found with analog hybrids. The
main function of a hybrid is to bring in the caller’s voice from the phone line as
clear and clean as possible. In the real world, when you send your voice down
the telephone line it has a tendency to bleed over into the caller’s audio. The
hybrid must adapt to the phone line in order to properly separate transmit and
receive audio. We use a 16 bit DSP (Digital Signal Processor) to continuously
monitor the phone line and local audio signals to deliver excellent trans-hybrid
loss, also known as separation. Our dual-convergence algorithm can achieve
excellent separation, typically exceeding 50 dB.
Ready to go?
The innkeeper 2/4 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
2
innkeeper 2/4™ Digital Hybrid
Getting to Know Your innkeeper 2/4
3 4 5 61 2
7 8 9 10
1. Menu Display
Backlit LCD, 2x20 characters.
2. Directional Control Pad
Navigate the menu. Press <Enter> to make a selection.
3. Numeric Keypad
Dial a number or manually enter menu selection codes.
4. Call Buttons
Takes the corresponding line off-hook; press this button to answer a call or
you can direct a call from your aux phone through the hybrid.
5. OH LED
Lit when the corresponding line is off-hook or on line with a call. Also
functions as a ring indicator and will icker when ring voltage is present on
the corresponding phone line.
6. Transmit LED
Bi-color Transmit LED will light green when audio is being sent down the
corresponding phone line at -20 dB or greater signal level.
LED will change to red to indicate clipping at -3 dB.
7. Drop Buttons
Press this button to drop (hang up) a call or place the correspnding phone
line on-hook.
Controls & Indicators
Controls & Indicators
3
Getting to Know Your innkeeper 2/4
Indicators Cont’d
8. Receive LED
Bi-color Receive LED will light green when audio is received from the
corresponding phone line at -20 dB or greater signal level.
LED will change to red to indicate clipping at -3 dB.
9. Conference Button
Conference lines 1 & 2 together when both lines are off-hook.
This feature is available on innkeeper 2 only.
10. Monitor Handset Jacks
Connect an Electret type handset for communication on the
corresponding phone line.
Transmit Signals
The goal is to drive the phone line at high enough levels to avoid phone line
noise, but not so loud as to cause excessive clipping. Adjust your <Send> audio
signals to a level slightly less than the point where you see occasional ashes of
red on the Transmit LED. These ashes should occur during loud speech bursts
only. If the Transmit LED stays lit red for extended periods, you can assume
that much of your speech is being clipped or distorted. In this case you should
lower the audio levels for the signal that is causing the clipping. The innkeeper
2/4 menu will also allow you to adjust your input levels in 1 dB increments over a
+/-10 dB range.
Receive Signals
The innkeeper 2/4 menu will allow you to adjust individual Caller output levels in
1 dB increments over a +/-10 dB range to give you the best signal level at your
equipment. The Caller level control in the menu will not change what you see on
the Receive LED.
Auto-Answer
The Auto-Answer feature can be activated through the innkeeper 2/4 menu. You
may select which phone lines will have auto-answer enabled as well as how
many rings before autoanswer. When Auto-Answer is enabled, you can still take
calls manually using the call button. When nished, you can either drop the call
manually or allow the call to auto-disconnect. Innkeeper 2/4 will look for a CPC
disconnect signal or ROH message from the phone company to determine when
a call has disconnected. This can take up to a minute.
4
innkeeper 2/4™ Digital Hybrid
Getting to Know Your innkeeper 2/4
Inputs & Outputs
1. Phone Line
Connect to a standard, single line, analog telephone line.
2. Aux Phone
Connect a single line analog telephone for call setup / dialing, or producer
call screening. Telephones connected will only work with the corresponding
phone line.
3. Caller Output
Male balanced line level XLR output contains only the callers voice from the
corresponding phone line.
4. Send Input
Female balanced line level XLR input for signals going into the
corresponding telephone line. Mic or line level input.
5. Master Send
Female balanced line level XLR input sends audio to any or all of the phone
lines based upon controls set within the menu.
6. Remote Control Jack
10 pin RJ-50 modular jack for connection to:
A. RS-232 Cable (Included)
B. JK Audio RIU-IP Remote Interface
C. Remote Terminal Block (Included). See page 5.
D. JK Audio Concierge Switch Core (Not compatible with innkeeper 4.)
7. Power Jack
Universal AC power input for 100-240 Volt, 50-60 Hz supply current.
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