JK Audio Innkeeper PBX User manual

VOIP/PBX DESKTOP DIGITAL HYBRID
JK Audio
innkeeper PBX™
User Guide

ii innkeeper PBX™ VOIP/PBX Desktop Digital Hybrid
Thank You
Thank you for purchasing a JK Audio innkeeper PBX VoIP/PBX Desktop 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: [email protected]
Or, check out our FAQ section for answers to common questions.
Limited Warranty
The innkeeper PBX 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.
Welcome

Contents
Overview 1
Getting to know your innkeeper PBX™
2 Controls & Indicators
4 Inputs & Outputs
2
Getting Connected 6
Operation 8
Conguration 9
FAQs 10
Technical Information 12
Contents iii
Contents

iv innkeeper PBX™ VOIP/PBX Desktop Digital Hybrid
16 bit DSP Technology
Proprietary Auto Null Algorithm
(50 dB null)
Send XLR Line Input
Mic/Line Switch
3.5mm Mono Line Input
Caller XLR Line Output
3.5mm Stereo Line Output
3.5 mm Stereo Headphone Jack
Send and Caller Signal Level LEDs
Send and Caller Volume Controls
Handset Selector Switch
(Electret, Carbon, Dynamic)
Universal Power supply with
detachable cord
RJ22 Phone Cord
Features
In the Box
Features

Overview 1
Introducing the innkeeper PBX™
Innkeeper PBX easily converts your multi-line PBX type telephone system into
a professional, affordable talk show console. Simply connect between your
telephone handset and the phone base.
What is a Digital Hybrid?
The innkeeper PBX digital hybrid connects audio signals to and from the handset
side of a telephone 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 PBX controls and connectors are clearly marked and ready for
operation. The Features diagrams and Operation sections on the following pages
will help you pinpoint any minor questions that you may have. 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

2innkeeper PBX™ VOIP/PBX Desktop Digital Hybrid
Getting to Know Your innkeeper PBX
3 4 5 6 71
8 9
2
10 11
1. Handset Button
Press this button to use the handset as if you were on a normal
telephone call.
2. Broadcast Button
Press this button to disable the handset and activate the innkeeper PBX for
use as a digital hybrid.
3. Send 1 Level
Adjusts the signal level that you are sending down the telephone line,
through the female XLR input.
4. Send 2 Level
Adjusts the signal level that you are sending down the telephone line,
through the 3.5mm mini jack input.
5. Caller Level
Adjusts the level of the incoming caller’s audio as it’s going out the
output jacks.
6. Headphone Level
Adjusts the signal level coming from the 3.5mm front panel headphone jack.
7. Headphones
The 3.5mm stereo headphone jack contains a mix of both the Send input
audio and the Caller audio.
Controls & Indicators

Getting to Know Your Innkeeper PBX™ 3
Getting to Know Your innkeeper PBX
Indicators Cont’d
8. OH LED
Lit when you are on line with a call (Off-Hook).
9. Send LEDs
Displays the signal level going to the phone line. The goal is to drive the
phone line audio at levels high enough to avoid phone line noise, but
not so loud as to cause excessive clipping. Adjust the Send level control
so that you rarely see ashes of the red -3dB peak Send LED. These
ashes should occur only during loud speech bursts. If the red LED stays
lit for extended periods you can assume that much of your speech is
being clipped or distorted. In this case you should lower the Send volume
control for the input that is causing the clipping.
10. Power LEDs
Lit when unit is plugged in and receiving power.
11. Caller LEDs
Displays the signal level coming in from the phone line, after the DSP.
This signal level will not change when you adjust the Caller knob. The
Caller level control knob does not change what you see on these LEDs.
Adjust the Caller level control to give you the best signal level at the
Caller XLR output or the Caller channel of the stereo output mini jack.

4Innkeeper PBX™ Broadcast Field Mixer
Getting to Know Your innkeeper PBX
Inputs & Outputs
1. Handset Jack
Connect your telephone handset to this jack.
2. Phone Jack
Connect this jack to the handset jack on your telephone using the supplied
handset jumper cable.
3. Handset Type Selector Switch
Use this switch to select the correct type of handset microphone that your
telephone uses.
A=Electret, B=Carbon, C=Dynamic
4. Caller Output
Male balanced XLR output contains only the caller’s voice.
5. Send 1 Input
Female balanced XLR input for signals going out to the phone line. Mic or
line level input.
6. Mic / Line switch
7. Sets the front end sensitivity of the Send 1 XLR jack. Set to Mic if you intend
to connect a dynamic microphone directly to the Send 1 jack. Set to Line if
you are connecting to the output of a mic mixer.
3 4 5 6 97 81 2

Inputs & Outputs Cont’d
7. Send 2 Mono Input
3.5mm mono mini jack input for signals going into the phone line.
Line level.
8. Stereo Output
3.5 mm stereo mini jack output contains both Send and Caller audio
channels with levels determined by the Send 1 and Send 2 level controls
and the Caller level control. Left channel contains your local Send audio
and right channel contains the Caller’s audio from the telephone line.
9. Power Jack
For connection only to the supplied 9VDC regulated power supply.
Getting To Know Your Innkeeper PBX™ 5
Getting to Know Your innkeeper PBX

6Innkeeper PBX™ Broadcast Field Mixer
Setting Up
1. Connect the supplied RJ-22 phone line cable between the jack marked
Phone on the back of the innkeeper PBX and to handset jack on the base of
your telephone.
2. Connect your telephone handset to the RJ-22 jack on the back of the
innkeeper PBX marked “Handset”.
3. Connect a pair of headphones to the front of the innkeeper PBX or mixer.
4. There are 2 ways to set up the audio equipment for your Innkeeper PBX:
A. One Mic/Headphone (No Mixer): See Figure 6a.
1. Connect a dynamic microphone cable to the Send 1 jack on the
Innkeeper PBX. Be sure to set the Innkeeper PBX Mic/Line switch
to the Mic position.
2. Connect a stereo cable from the mini-jack Stereo Out on the
Innkeeper PBX to the Line In on your computer sound card or
other recording equipment that has a stereo input.
B. Two or more Inputs/Outputs (Mix-Minus Caller): See Figure 7a.
A mix-minus signal is an audio signal that contains a mix of your local
microphones plus any other audio, minus the Caller’s own voice.
Sending the Caller’s audio back to the innkeeper PBX will cause an
echo, or feedback.
1. Connect Caller to any LINE Level input on mixer.
2. Connect Aux (or FX) Send on mixer to Send 1 on Innkeeper PBX.
Set the Innkeeper PBX Mic/Line switch to the Line position.
5. Connect the supplied DC power supply to the back of the Innkeeper PBX
and then to an AC power outlet.
Place a test call to a quiet location. Set the “A-B-C” switch on innkeeper PBX
for best audio. Set the Send level control so that while you are speaking into
the microphone, the Send LEDs on the hybrid light the -20 dB green LED
consistently and ash the -9 dB green LED. If you ash the -3 dB red LED, lower
the level. Set the Caller control for good recording level of the caller audio at the
output jack.
Getting Connected
Figure 6a
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LINE IN 5
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LINE IN 8INSERT ST RETURN
GAIN
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PAN PAN PAN PAN
FX MASTERFX TO MON
PHONES TAPELEVEL
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Getting Connected 7
Mix-Minus Caller
For whichever input channel you have the Caller connected to, turn the
corresponding Aux control to minimum. All other Aux controls should be set for
audio sent to the phone line. Each Aux Send bus is completely separate from
all other outputs, so these Aux controls will not affect what is heard on the Main
outputs or on any other Aux buses. This Aux Send bus is pre-fader, so you can
use the fader controls to set the levels of each channel to the main output.
If your mixer does not have an Aux Send bus, you can use Pan controls with the Left and
Right outputs. Pan all the microphones, etc. to the Left output and pan the Caller to the
Right output. Then connect only the Left output to the Innkeeper PBX Send 1. Or, you may
use an external Mix-Minus box that will create this signal for you.
Getting Connected
Figure 7a
12 3
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0* #
9

8innkeeper PBX™ VOIP/PBX Desktop Digital Hybrid
Telephone Handset
Innkeeper PBX will disable the microphone in the telephone handset when you
press the Broadcast button. Use your telephone to place or screen a call. When
you are ready to take the call on innkeeper PBX, simply press the Broadcast
button. Innkeeper PBX will automatically release the Hold (if Hold is used). Make
sure you do not put the telephone handset back in it’s cradle while you are on a
call. This will still drop the call. Do not disconnect or remove the handset during
your call as this will change the input impedance from the phone line and change
the audio level. If you need to take the call back on your telephone, press the
Handset button on innkeeper PBX. This will disable the inputs and outputs on
innkeeper PBX and connect your handset back to the telephone. Your telephone
will operate as a normal telephone anytime you are in Handset mode. Leaving
the hybrid connected to the handset jack on your telephone will not affect normal
use of your telephone. Audio will only pass through the hybrid when you press
the Broadcast button.
Optional Jumper Settings
There is a jumper located inside the innkeeper PBX at J9 that affects handset
operation. The factory default closed position (jumper covering both pins)
disables only the handset microphone when the Broadcast button is pressed.
Changing the jumper to the open position (either remove the jumper or cover
just one pin) allows you to completely disable both the handset microphone and
speaker when the Broadcast button is pressed.
If the incoming audio level from your telephone is too high and you are
consistently lighting the red –3dB Receive LED, rst try decreasing the volume
using the controls on the base of your telephone. If you still cannot drop the
incoming audio level enough, and your unit was purchased after February 2007,
you may need to change jumper J10 inside innkeeper PBX.
There are three possible settings to adjust Caller receive level:
Pins 1 & 2 closed: 0dB (factory default)
Pins 2 & 3 closed: -6dB
Pins 1-3 left open: -12dB
To change the jumper settings, rst disconnect power from the innkeeper PBX,
then remove the cover and locate the appropriate jumpers on the printed circuit
board.
Operation

A-B-C Selector Switch
Use this switch to select the correct type of handset microphone your telephone
uses. A=Electret, B=Carbon, C=Dynamic. Trial and error seems to work best in
determining which handset type to use. Your innkeeper PBX will only function
correctly if the handset type selector switch is in the correct position. This switch
changes signal level, impedance, and wiring to accommodate the differences
in handset microphone types. To determine the correct position, you should
place a call to another telephone line, then try to send audio to the phone line
through the input jack of the innkeeper PBX . While doing this, switch between
the three different handset type positions. Choose the position that works best by
monitoring the audio quality and Send LEDs.
Although not conclusive, the following guidelines may help:
• The majority of newer telephones have electret type microphones and will use
the ‘A’ position.
• Older telephones that have the round “screw type” handsets contain carbon
microphones and use the ‘B’ position.
• Many Radio Shack®, Panasonic®, and Nortel® telephones have dynamic
microphone types and use the ‘C’ position.
9
Conguration
Configuration

10 Innkeeper PBX™ Broadcast Field Mixer
1. Will innkeeper PBX work with my ___ PBX phone system?
Probably yes. We have to say probably because the handset interface is
proprietary and therefore can change from model to model. We have no
way of predicting how a phone manufacturer will use the handset wires in
the future. The three handset microphone types that we support, electret,
dynamic and carbon, cover every handset microphone type that we have
seen in use, but the wire diagrams can change without notice.
2. Will your digital hybrid provide phantom power for a
condenser mic?
No, this device will not provide phantom power. If you are connecting your
microphone directly to the innkeeper PBX, use a dynamic mic.
3. I can’t dial out on my phone and I hear a lot of noise on
the call.
The innkeeper PBX will not work with any telephone that has a keypad in
the handset. You need to use a telephone with a standard handset.
4. Can innkeeper PBX auto-answer or auto-disconnect?
No, the handset cord on your phone is only active if the handset is off-hook.
This must be done manually. So there is no way to auto-disconnect. You
must return the handset to the cradle.
5. I have everything connected correctly. Why can’t the caller
hear me?
Check the position of the A-B-C switch (which will probably be set to A or C).
Also, you cannot use the speakerphone function on your telephone during
your recording. Innkeeper PBX accesses audio through the handset cord.
With the speakerphone turned on, there is no audio going through the
handset. You must use a microphone.
6. Why is there a loud hum on the output of my innkeeper PBX,
even when nothing else is connected?
Make certain you are using the regulated power supply that was shipped
with this unit. Power supplies are not all the same.
7. Why does my laptop only record half of the conversation? I am
using the Stereo output on the innkeeper PBX and I have a
stereo cable.
Most laptop computers only have a mic input, which is mono. You will need
to either get a sound card with a stereo line level input for your laptop or use
a USB or FireWire interface product.
FAQs

FAQs 11
8. How do I record onto my computer and edit the les?
You will need to purchase or download any audio editing software of your
choice. You may also need to edit the audio conguration les on your
computer or in your software to allow recording in stereo. innkeeper PBX
just allows you to access the audio from your phone line.
9. Does innkeeper PBX come with any Talk Show software?
No, our description “Turn your PBX into a low cost talk show system”
pertains to using a multi-line PBX phone system as a line selector switch.
When the innkeeper PBX is on line, simply select which phone line you want
to talk to, either dropping the last caller, or putting them back on hold.
10. Why is there a Send 2 mini-jack on the back of my
innkeeper PBX?
This is a second line level input to innkeeper PBX. Here you can connect
another device, such as a CD player, the Line Out from your computer
or even the output of your personal audio player, to add audio to the
conversation. This enables you to play background music or other sound
bites during your discussion. Do not connect a microphone to this jack. This
is a mono input. If you connect a stereo output here such as a computer
Line Out, you will receive only Left channel audio on this jack.
11. Can I still use my phone to take regular calls or do I have to
disconnect the innkeeper PBX when I am not using it?
You can leave the innkeeper PBX in place and your telephone will continue
to operate normally. Audio will only pass through the hybrid when you press
the Broadcast button.
FAQs

12 innkeeper PBX™ VOIP/PBX Desktop Digital Hybrid
Technical Information
Input Impedence / Level
Female XLR (2) Mics 1k ohms / 15 mV RMS; -34 dBu nom.;
Mic/Line Pad Switch = +6 dBu max
1/8” (3.5mm) Stereo Line 20k ohms / 250 mV RMS; -10 dBu nom.
Output
Balanced Male XLR 200 ohms / 500 mV RMS; -4 dBu nom.;
+14 dBu max; Caller Only
1/8” (3.5mm) Stereo 50 ohms / 250 mV RMS; -10 dBu nom.; +6 dBu max
Left = Send; Right = Caller
Headphone 1/4” Stereo 8 ohms / 250 mW
Mixed Send and Caller
Phone Line Connector RJ22
Isolation 1500 VAC
Frequency Response Telephone Side 200 Hz-3600 Hz
Power 120-240 VAC Power Supply
Size 7” x 6” x 1.6” (18 x 15 x 4.2 cm)
Weight 2.2 lbs. (1kg)
Specications

Block Diagram 13
Technical Information
innkeeper PBX Block Diagram
Phone Line Jack Handset Jack
Caller Out
Monitor
level
Headphone
Stereo Output R = Caller L = send
Caller
Send 1 Level
Send 2 Level
Mic / Line Send Input Line level Send 2 Input
Handset Type
ABC Switch
Digital
Hybrid

14 innkeeper PBX™ VOIP/PBX Desktop Digital Hybrid
FCC Registration
FCC Registration
Your new JK Audio product has been registered with the Federal
Communications Commission (FCC). This product complies with the standards in
Part 68 of the FCC rules.
1. Connection and use with the nationwide telephone network
The FCC requires that you connect this telephone equipment to the national
telephone network through a USOC RJ-11C modular telephone jack. This
equipment may not be used with Party Line Service or Coin Telephone Lines.
This equipment is hearing aid compatible.
2. Information for the telephone company
Upon request from your local telephone company, you are required to provide the
following information:
A. The “line” to which you will connect the telephone equipment (that is, your
telephone number), and
B. The telephone equipment’s FCC registration number.This can be found on
the bottom of your telephone equipment, and,
C. The ringer equivalence number (REN) for this equipment. The REN is
used to determine the quantity of devices which will be connected to the
telephone line. Excessive RENs on the telephone line may result in the
devices not ringing in response to an incoming call. In most, but not all
areas, the sum of the RENs should not exceed 5.0. To be certain of the
number of devices that may beconnected to the line, as determined by the
total RENs, contact the local telephone company.
3. Repair Instructions
If it is determined that your telephone equipment is malfunctioning, the FCC
requires that it not be used and that it be unplugged from the modular outlet until
the problem has been corrected. Repairs to this telephone equipment can only
be made by the manufacturer or its authorized agents or by others who may be
authorized by the FCC. For repair procedures, follow the instructions outlined
under the warranty section of the manual.
4. Rights of the telephone company
If telephone equipment is causing harm to the network, the telephone company
may temporarily discontinue your telephone service. If possible, they’ll notify you
before they interrupt service. If advanced notice isn’t practical, you’ll be notied
as soon as possible. You’ll be given the opportunity to correct the problem,
and you’ll be informed of your right to le a complaint with the FCC. Your
telephone company may make changes in its facilities, equipment, operations or
procedures that could affect the proper functioning of your JK Audio product. If
such changes are planned, you’ll be notied by your telephone company.

FCC Part 15 Compliance 15
FCC Part 15 Subpart A Compliance
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the
interference at his/her own expense.
Changes or modications not expressly approved by JK Audio can void the
user’s authority to operate the equipment.
FCC Part 15 Compliance

JK Audio, Inc.
1311 E 6th St.
Sandwich, IL 60548
United States
Telephone: [phone]
Toll Free: 1.800.jkaudio
Fax: [phone]
www.jkaudio.com
© 2013 JK Audio, Inc. All rights reserved.
innkeeper PBX™
BROADCAST FIELD MIXER
User Guide Version 9/26/13
JK Audio