JK Audio innkeeper 4 User Manual

innkeeper 2
innkeeper 4

Multi Line Digital Hybrids

User Guide

JK Audio

Introduction

Innkeeper multi line digital hybrids 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 limited
audio path.

What is a Digital Hybrid?

A digital hybrid connects 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 callers 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 to continuously monitor the phone line and
audio signals to deliver excellent separation. Our dual­convergence algorithm can achieve excellent trans-hybrid
loss, typically exceeding 50 dB, without any setup.

Ready to go?

The Innkeeper 2/4 feature diagram will help you pinpoint any
minor questions that you may have. If this is your first
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 find those deep technical
questions are covered on later pages.

2

Features

1245 10

9

8

7

36

11 12 13 14 15 16 17

18

3

Features (cont)

Backlit LDC menu display, 2x20 characters.

1.

Directional Arrow Keys - Press these buttons to navigate

2.
through the menu.

Enter Button - Press this button to make a selection on

3.
the menu.

Keypad - Use these keys to dial a phone number or

4.
manually enter menu selection codes.

Call Buttons - Press these buttons to take the

5.
corresponding phone line off-hook or manually answer
an incoming call.

Drop Buttons - Press these buttons to manually drop a

6.
call or place the corresponding phone line on-hook.

OH LED - Off-Hook LED lights when the corresponding

7.
phone line is off-hook or on line with a call. Also
functions as a visual ring indicator and will flicker when
ring voltage is present on the corresponding phone line.

Transmit LED - Bi-color Transmit LED will light green

8.
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.

Receive LED - Bi-color Receive LED indicates that caller

9.
audio is present on the corresponding phone line at -20
dB or greater signal level if green and -3 dB or greater if
red.

Monitor Handset Jacks - Used to connect an electret

10.
type handset for communication on the corresponding
phone line.

4

Features (cont)

11.

12.

13.

14.

15.

16.

Phone Line Jack - RJ-11 phone line jacks for connection to
analog phone lines.

Auxiliary Phone Jack - RJ-11 phone jacks for connection to
analog telephone(s). Telephone(s) connected will only
work with corresponding phone line jack. The auxiliary
telephone should be used only for dialing and answering
calls.

Caller XLR - Balanced line level XLR outputs containing
Caller audio from the corresponding phone line.

Send XLR - Balanced line level XLR inputs used to send
audio to the corresponding phone line.

Master Send - Balanced line level XLR input may send
audio to any or all of the phone lines based upon controls
set within the menu.

Remote Jack - Proprietary 10 pin RJ 50 for connection to a
remote terminal block. The included terminal block
includes an Off-Hook signal pin and a Call/Drop control pin
for each channel.

17.

18.

AC connector - For connection to 120 - 240 VAC, 50-60 Hz
power.

Conference button - Use this feature to conference together
lines 1 and 2 when both lines are off-hook. This feature is
available on innkeeper 2 only.

5

Operation

Connecting Cables

Although each application will require a slightly different setup,
following is a general cable connection setup and explanation.

Phone Line - Connect the supplied RJ-11 phone line cable(s)
between the RJ-11 jack(s) marked "Line" and your analog phone
line jack(s). Be sure these jacks can support standard analog
telephone operation. The Innkeeper 2/4 will not work with "dry
pair" phone line connections.

Send XLR - Connect a line level (mix-minus) audio signal to the
Send jack(s) on the Innkeeper 2/4. Audio will be sent down only
the corresponding phone line.

Master Send - Connect a line level (mix-minus) audio signal to
the Master Send input. Audio will be sent down either or both
phone lines based upon your selections in the menu controls.

Caller XLR - Connect the Caller output jack(s) to line level
input(s) on your audio equipment. Each caller output jack will
contain audio only from its corresponding phone line. Local
audio and audio from alternate phone lines will not be present on
these jacks.

Power - Connect the supplied power cable to a 120 - 240 VAC
power outlet.

Auxiliary Telephone(s)

You can use an auxiliary telephone to place or screen a call, and
then the call can be placed on hold. When you are ready to take
the call on Innkeeper 2/4, simply press the Call button for the
corresponding phone line. Your telephone will automatically
release the hold while you talk. If you need to take the call back
on the auxiliary telephone, simply pick up the phone before the
Innkeeper 2/4 Drop button is pressed for that line.

6

Operation (cont)

Transmit Signals

The bi-color Send LED displays the signal level as it goes out
over the phone line. The LED will display transmit signal levels
at -20 dB as green and indicate clipping at -3 dB as red. 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 flashes of red on the
Transmit LED. These flashes 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 bi-color Receive LED displays the signal coming from the
phone line and out of the DSP.
signal levels at -20 dB as green up to -3 dB where it will
change to red. 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.

The LED will display receive

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
auto-answer. When Auto-Answer is enabled, you can still take
calls manually using the call button. When finished, you can
either drop the call manually or allow the call to auto­disconnect. 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.

7

Operation - Conference

Conference(innkeeper 2 only)

One press of the conference button will join the audio paths of
both line one and line two, providing there are calls present on
both lines.

A second press of the conference button will break the audio
paths between the calls.

An auto-dropped or manually dropped line will automatically
break the conference.

By default line1 send and line 2 send audio will be mixed
together digitally and sent into both phone lines. Line 1 caller will
also hear line 2 caller audio. Line 2 caller will also hear line 1
caller audio. In the menu this configuration is referred to as
Send-Mix, Caller-No Mix. This default configuration is by far the
most widely used. Advanced options are available for
Conference mode however in most situations it is not necessary
to change these options from the default.

8

Operation - Conference

9

Operation (cont)

Innkeeper 2 Advanced Conference Options

The factory default conference mode provides both callers with
a mix of Line 1 Send and Line 2 Send audio. Additional mix
options can be found in the Configuration menu. These options
allow your enable and disable Send and Caller mix features.
Keep in mind that no matter what options are selected, both
callers will always be able to communicate with each other in
Conference mode.

Send = Mix (default)
Line 1 Send and Line 2 Send audio mixed and sent to both
caller lines.

Send = No Mix
Line 1 Send audio to line 1 caller
Line 2 Send audio to line 2 caller.

Caller = No Mix (default)
Line 1 caller audio only on the Line 1 caller output XLR
Line 2 caller audio only on the Line 2 caller output XLR.
Send audio will not be present on these outputs.

Caller = Caller Mix
Line 1 and Line 2 caller audio on both of the line 1 and line 2
caller XLR outputs. Send audio will not be present on these
outputs.

Caller = Full Mix Minus
A full mix of all audio on each of the caller XLR outputs, minus
the Send audio for that phone line.
Line 1 Caller XLR contains Caller 1 + Caller 2 + Send 2.
Line 2 Caller XLR contains Caller 1 + Caller 2 + Send 1.

10

Operation (cont)

Advanced Conference Options Signal Flow Diagram

Default Send=Mix, Caller=No Mix Send=No Mix, Caller=No Mix

Caller 1 Caller 2Caller 1 Caller 2

Line 1

Send Caller

Send=Mix, Caller=Caller Mix Send=No Mix, Caller=Caller Mix

Line 2

Send Caller

Line 1

Send Caller

Line 2

Send Caller

Caller 1 Caller 2Caller 1 Caller 2

Line 1

Send Caller

Send=Mix, Caller=Full Mix Minus Send=No Mix, Caller=Full Mix Minus

Line 2

Send Caller

Line 1

Send Caller

Line 2

Send Caller

Caller 1 Caller 2Caller 1 Caller 2

Line 1

Send Caller

Line 2

Send Caller

11

Line 1

Send Caller

Line 2

Send Caller

Operation (cont)

Remote Jack

The 10 pin RJ-50 jack on the back of the Innkeeper 2/4 provides
a proprietary connection to the supplied remote terminal block. A
1 meter cable is provided for this connection.

Remote Terminal Block

The Remote Terminal Block includes an Off-Hook signal pin and
a Call/Drop control pin for each phone line channel. The OH
signal pin is current limited to 50 mA, 5 VDC. The control pin
toggles the corresponding phone line off-hook / on-hook with a
connection / break from ground.

Backlit Menu Display and Controls

The Innkeeper 2/4 menu is controlled by the directional arrows,
alpha numeric keypad and Enter button. You may use either the
arrow keys to scroll through the menus or the keypad to directly
select menus and use the Enter button or the keypad to make
your selections. Through the menu you have access to the
following. The () indicate the numeric entry used to automatically
access these menus without scrolling. For example to access the
Call History View menu directly, you would press 2 Enter 1 Enter.

Phone Book(1) A 50 entry name and number phone book for
storing speed dial numbers.

Phone Book View(1,1) - Allows you to view name and phone
numbers of added entries. You may dial the selected entry from
this menu by simply pressing the Call button on any phone line.

Phone Book Add Entry(1,2) - You may add new entries from this
menu. After pressing Enter, you will be prompted for the entry
phone number. You may enter a 2 second pause in your phone
number entry by pressing the > key. Multiple > key presses will
enter multiple 2 second pauses. The display will show a "."
between the numbers for each 2 second pause entered. After the
Enter button is pressed again you will be prompted for the entry
Name. Alpha characters may be selected by using the multitap
feature. For example, to enter the character "a" you would press
the 2 key. To enter "b" you would press the 2 key twice. Hitting a

12

Operation (cont)

new key, the Next> key or waiting 2 seconds will accept the
current character and move the cursor forward. See page 11 for
multitap key legend.

Phone Book Delete Entry(1,3) - Entries may be deleted
individually from this menu. You will be prompted to confirm
delete of an entry after selection.

Phone Book Clear(1,4) - Press enter from this menu to clear all
phone book entries. You will be prompted to confirm your intent
to clear the entire phone book before deletion.

Call History

the Call History menu. The Call History menu will hold up to 16
numbers.

Call History View(2,1) - Allows you to view name and phone
numbers of automatically added entries. You may dial the
selected entry from this menu by simply pressing the Call button
on any phone line.

Call History Clear(2,2) - Press enter from this menu to clear all
automatically added history entries. You will be prompted to
confirm your intent to clear the entire call history before deletion.

Config.

Disconnect, Audio Levels, Master Send, Calibration and Restore
Factory Default or Custom Settings.

Config. Auto-Answer(3,1) - Here you can configure the auto­answer feature.

Config. Auto-Answer On/Off(3,1,1) - This menu allows you to turn
Auto-Answer on and off for each line independently or for all
lines.

(2) Calls you place will automatically be entered into

(3) This menu allows you to control Auto-Answer, Auto-

Config. Auto-Answer Line Ring Count(3,1,2) Here you may
select the number of rings before the unit auto-answers on each
line independently or on all lines.

13

Operation (cont)

Config. Audio Lvls.(3,2) - Audio levels for each phone line input
and output can be set here. The Audio Levels menu allows you
to adjust levels of audio in 1dB increments over a +/- 10dB
range. You may adjust the levels of the Send inputs as well as
the Caller outputs.

Config. Audio Lvls. Send(3,2,1) - Send input levels can be set
here for each line independently or all lines. The settings from
this menu affect the independent Send input as well as the
Master Send for the selected line(s).

Config. Audio Lvls. Caller(3,2,2) - Caller output levels can be set
here for each line independently or all lines.

Config. Master Send(3,3) - This menu gives you the ability to turn
the Master Send on or off for each line independently or all
phone lines.

Config. Calibration(3,4) - Here you have the ability to send a
1kHz test tone down the phone line(s) and out the output jacks.
You may turn the tone on or off for each line independently or for
all lines. This is not required for setting the null. This tone is only
used for your convenience in setting your equipment audio
levels.

Conference(3,5) - This menu allows you to configure settings for
the Conference feature on the innkeeper 2.

Conf. Send Mix Mode(3,5,1) - Configure the Send Mix Mode to
"Send Mix" default or "No Mix". The "Send Mix" default option
mixes both the Line 1 Send and Line 2 Send audio signals
together and sends that audio down both phone lines. The "No
Mix" option does not mix these signals together. Line 1 Send
audio will only go to phone line 1 and Line 2 Send audio will only
go to line 2. You may still use the Master Send input to send a
common audio signal to both phone lines.
Conf. Caller Mix Mode(3,5,2) - Configure the Caller Mix Mode to
"No Mix" default, "Caller Mix" or "Full Mix Minus". The "No Mix"

14

Operation (cont)

option does not mix any audio together on the Caller output
jacks. Caller 1 out will contain Line 1 Caller audio and Caller 2
out will contain Line 2 Caller audio. The "Caller Mix" option
mixes together both caller audio signals on both Caller output
jacks. Caller 1 and Caller 2 outputs will contain both Line 1 and
Line 2 caller audio. The "Full Mix Minus" option provides a mix­minus signal output on both Caller out jacks. Caller 1 out will
contain Line 1 caller audio, Line 2 caller audio and Send 2
audio. Caller 2 out will contain Line 1 caller audio, Line 2 caller
audio and Send 1 audio.

Config. Presets(3,6) - With this menu you can save and restore
custom presets or reset the unit to factory default presets.

Config. Presets - Default(3,6,1) - Here you may restore factory
default presets. You will be prompted to confirm Factory Reset
after selecting this option.

Config. Presets - Custom(3,6,2) - Here you may save and
restore custom presets based upon your current configuration.

15

MultiTap Key Legend

These character sets are active only when entering the Name
of your phone book entry. While entering the phone number
you will not have access to alpha characters.

Control Keys:

Clear last character

<

Next / Accept current character

>

Shift (press at the start of each uppercase entry)

*

Space

#

Character Keys:

.@?!-\,&:| mno6

16

abc2 pqrs7

27

def3 tuv8

38

ghi4 wxyz9

49

jkl5

5

Remote Interface Unit

A Remote Interface Unit has been provided in this package with
a special 1 meter cable for connection to your innkeeper 2/4
multi-line digital hybrid.

This terminal block was designed to allow remote off-hook / on­hook control and status for each phone line. The innkeeper 2
version also provides on / off control and status for the
Conference feature. Only use the included RJ-50 cable to
connect the RIU to the Remote jack on the innkeeper 2/4.

Connecting the Line OH Control pin to the Ground pin will take
the line off-hook, breaking this contact will release the line and
disconnect the call.

The OH Status pin will provide 5V, 50mA current when the
corresponding line is off-hook. You can use this pin to drive a
relay, light an LED, etc.

16

Specifications

Inputs:

Line:

Outputs:

Balanced:

Handset:

Phone Line:

Aux Phone:

Isolation:

Ringer:

Frequency:
Response

Balanced Female XLR, 20k ohm,
+10 dBu max send

Balanced Male XLR, 200 ohm,
+14 dBu max

Front panel handset jacks biased for electret
handset (not included)

RJ11C

RJ11C

1500 VAC

0.5B REN

Telephone Side 200 Hz - 3600 Hz

Power:

Size:

Weight:

* Features and Specifications subject to change without notice.

120-240 VAC, 50-60 Hz
power supply (internal)

19" x 7.3" x 1.75" (26.7 x 18.6 x 4.5 cm)

7.2 pounds (3.2 kg)

17

FCC Part 15 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 own expense.
Changes or modifications not expressly approved by JK Audio can void the
user's authority to operate the equipment.

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.

Connection and use with the nationwide telephone network

1.
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.

Information for the telephone company

2.
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 be
connected to the line, as determined by the total RENs, contact the
local telephone company.

18

FCC Registration (cont)

Repair Instructions

3.
f 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

Rights of the telephone company

4.

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 notified as soon as possible. You'll be
given the opportunity to correct the problem, and you'll be informed
of your right to file 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 notified by your telephone company.

19

Warranty

Innkeeper 2/4 is covered by a 2-year warranty to be free from
defective workmanship and materials. In the event that the
Innkeeper 2/4 needs repair, you must call us to get an
authorization, and then carefully pack and ship it to us. You will
pay for shipping to us and we will pay for return back to you, UPS
ground. No free repairs will be made if the defect was caused by
misuse, weather conditions, or other cause, except for defective
workmanship or materials. THERE ARE NO EXPRESS OR
IMPLIED WARRANTIES WHICH EXTEND BEYOND THE
WARRANTY HERE MADE.

09/05

JK Audio

800-JK-Audio [phone] www.jkaudio.com [e-mail]