JK Audio Innkeeper 2 User manual

innkeeper 2
innkeeper 4
Multi Line Digital Hybrids
User Guide
JK Audio

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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.
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 dual-
convergence algorithm can achieve excellent trans-hybrid
loss, typically exceeding 50 dB, without any setup.
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.
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.
What is a Digital Hybrid?
Ready to go?
Any Questions?
Introduction

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Features
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Backlit LDC menu display, 2x20 characters.
Directional Arrow Keys - Press these buttons to navigate
through the menu.
Enter Button - Press this button to make a selection on
the menu.
Keypad - Use these keys to dial a phone number or
manually enter menu selection codes.
Call Buttons - Press these buttons to take the
corresponding phone line off-hook or manually answer
an incoming call.
Drop Buttons - Press these buttons to manually drop a
call or place the corresponding phone line on-hook.
OH LED - Off-Hook LED lights when the corresponding
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
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
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
type handset for communication on the corresponding
phone line.
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Features (cont)

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.
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.
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Features (cont)

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Connecting Cables
Auxiliary Telephone(s)
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.
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.
Operation

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Transmit Signals
Receive Signals
Auto-Answer
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.
The bi-color Receive LED displays the signal coming from the
phone line and out of the DSP.
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 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.
The LED will display receive
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.
Operation (cont)

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.
Operation - Conference
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Operation - Conference

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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.