JK Audio Innkeeper 2 User manual

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

2
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 chal-
lenge 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 ana-
log hybrids. The main function of a hybrid is to bring in the call-
ers 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 sepa-
rate transmit and receive audio. We use a 16 bit DSP to con-
tinuously 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.
Ready to go?
The innkeeper 2/4 features diagrams 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.

3
Features—Front View
1 Backlit LDC menu display, 2x20 characters.
2. Directional Arrow Keys - Press these buttons to navigate through
the menu.
3. Enter Button - Press this button to make a selection on the menu.
4. Keypad - Use these keys to dial a phone number or manually en-
ter menu selection codes.
5. Call Buttons - Press these buttons to take the corresponding
phone line off-hook or manually answer an incoming call.
6. Drop Buttons - Press these buttons to manually drop a call or
place the corresponding phone line on-hook.
7. 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.
8. 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.
9. Receive LED - Bi-color Receive LED indicates that caller audio is
present on the corresponding phone line at -20 dB or greater sig-
nal level if green and -3 dB or greater if red.
10. 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.
11. Monitor Handset Jacks - Used to connect an electret type hand-
set for communication on the corresponding phone line.
1 2 3 4 5 7 11
6 9
8
10

4
Features—Rear View
12. Phone Line Jack - RJ-11 phone line jacks for connection to ana-
log phone lines.
13. Auxiliary Phone Jack - RJ-11 phone jacks for connection to ana-
log telephone(s). Telephone(s) connected will only work with cor-
responding phone line jack. The auxiliary telephone should be
used only for dialing and answering calls.
14. Caller XLR - Balanced line level XLR outputs containing Caller
audio from the corresponding phone line.
15. Send XLR - Balanced line level XLR inputs used to send audio
to the corresponding phone line.
16. 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.
17. Remote Jack - Proprietary 10 pin RJ 50 for connection to a re-
mote terminal interface. The included terminal block features an
Off-Hook signal pin and a Call/Drop control pin for each channel.
See pages 8-9. This jack can also be used for connection to the
optional JK Audio RIU-IP remote interface (see page 16)
18. AC connector - For connection to 120 - 240 VAC, 50-60 Hz
power.
12
13
14
15
16 17 18

5
Connection—Mix-Minus Setup
Number of mics
depends on mixer
Each Caller to any
line level input Aux Send 1 to Send 1,
Aux Send 2 to Send 2
For whichever input channel you have each Caller connected to, turn the
corresponding Aux control to minimum (usually hard left) so each Caller will
not hear their own audio. Each Aux Send bus is completely separate from
all other outputs, so each row of Aux controls will not affect what is heard
on the Main outputs or on other Aux buses. If possible, the Aux Send buses
should be pre-fader, so you can use the fader controls to set the levels of
each channel to the main output. The innkeeper 2 was used in this exam-
ple. Follow the same strategy for an innkeeper 4, with 4 Aux Send buses.
Auxiliary telephones optional. Used to
dial out to set up calls or to answer calls.
Turn only these
two knobs all the
way down so
this audio does
not go back to
the same caller.
Turn all other
knobs up so
each caller can
hear all mics and
other callers

6
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 RJ11 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 Caller output(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. Innkeeper 2 has the ability to send isolated
caller audio, mixed caller audio, or mixed caller and local au-
dio from the Caller XLR depending on selections made in the
Conferencing menu.
• 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 be-
fore the innkeeper 2/4 Drop button is pressed for that line.

7
Operation (continued)
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 clip-
ping. Adjust your Send audio signals to a level slightly less than
the point where you see occasional flashes of red on the Trans-
mit 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 dis-
torted. In this case you should lower the audio levels for the sig-
nal 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. 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.
Auto-Answer
The Auto-Answer feature can be activated through the inn-
keeper 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. Inn-
keeper 2/4 will look for a CPC disconnect signal or ROH mes-
sage from the phone company to determine when a call has
disconnected. This can take up to a minute.

8
Remote Jack
Remote Jack
The 10 pin RJ-50 jack on the back of the innkeeper 2/4 pro-
vides a proprietary connection to the supplied remote terminal
block. A 1 meter cable is provided for this connection. This jack
can also be used to connect to the optional JK Audio RIU-IP
remote interface unit (see page 16).
Remote Terminal Block
A Remote Terminal Block has been provided in this package
with a special 1 meter cable for connection to your innkeeper
2/4 multi-line digital hybrid.
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.
This terminal block was designed to allow remote off-hook / on-
hook control and status for each phone line. The innkeeper 2
model also provides on / off control and status for the Confer-
ence feature. Use only the included RJ-50 cable to connect the
Remote Terminal Block 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 cor-
responding line is off-hook. You can use this pin to drive a re-
lay, light an LED, etc.

9
Operation (continued)Remote Terminal Block
1
GRD
2
L1-ST
3
L1-CNT
4
L2-ST
5
L2-CNT
6
L3-ST
7
L3-CNT
8
L4-ST
9
L4-CNT
10
GND
* momentary or static line control selection for
all lines is made via jumper J5
NOTE: Installation of jumper J5 will set “static” OH line control,
so that a steady ground on any control input will take the corre-
sponding line offhook, otherwise the line will remain onhook.
Removal of jumper J5 will return OH line control to its original
“momentary” control mode, so that any line control input that is
momentarily brought to ground (for a min. of 100ms), will tog-
gle/switch the corresponding line state between onhook or off-
hook, as determined by the given line’s previous state.
momentary
mode
J5
Terminal
Number Terminal Description
1 Ground
2 Line 1 - OH status signal (nominal +5Vdc @ 50ma, when active)
3 Line 1 - OH control (momentary to grd toggles lineon/offhook)*
4 Line 2 - OH status signal (nominal +5Vdc @ 50ma, when active)
5 Line 2 - OH control (momentary to grd toggles lineon/offhook)*
6 Line 3 - OH status signal (nominal +5Vdc @ 50ma, when active)
7 Line 3 - OH control (momentary to grd toggles lineon/offhook)*
8 Line 4 - OH status signal (nominal +5Vdc @ 50ma, when active)
9 Line 4 - OH control (momentary to grd toggles lineon/offhook)*
10 Ground
Terminal Block Pinout

10
Operation - Menu Display
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 di-
rectly 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 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
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 "." be-
tween the numbers for each 2 second pause entered. After the
Enter key is pressed again you will be prompted for the entry
Name. Alpha characters may be selected by using the multi-tap
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 new key, the Next> key or waiting 2 seconds will ac-
cept the current character and move the cursor forward. See
page 10 for multi-tap key legend.
Phone Book Delete Entry (1,3) Entries may be deleted indi-
vidually from this menu. You will be prompted to confirm delete
of an entry.
Phone Book Clear (1,4) Press enter from this menu to clear
all phone book entries. You will be prompted to confirm your