JK Audio innkeeper 1rx User manual

JK Audio
User Guide
innkeeper 1rx™
Digital Hybrid

ii innkeeper 1rx™ Digital Hybrid
Thank You
Thank you for purchasing a JK Audio innkeeper 1rx 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 1rx 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.
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 ampliers) 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 qualied service personnel.
Welcome

Overview 1
Getting to know your innkeeper 1rx
2Controls & Indicators
4Inputs & Outputs 2
Getting Connected 6
Operation 8
Conguration 9
Optional Remote Control 11
Serial Port Interface 12
FAQs 13
Technical Information 14
Contents iii
Contents

iv innkeeper 1rx™ Digital Hybrid
16 bit DSP Technology
Auto-Answer (Switchable On/O󰀨)
Proprietary Auto Null Algorithm
(50 dB null)
AGC, Ducking, Presence
1 kHz Tone Generator
Send XLR Line Input
Mic/Line Switch
Caller XLR Line Output
Mix Out XLR Line Output
Front Panel 1/4” Headphone Jack
Remote Control via Screw Terminals
or RS-232
RIU-IP Remote IP Interface
Monitor Speaker Terminals
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 1rx™
innkeeper 1rx 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 1rx 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 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 1rx 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

2innkeeper 1rx™ Digital Hybrid
Getting to Know Your innkeeper 1rx
3 4 5 6 7 81 2
9 10 11 12 13 14 15 16 17
1. Call Button
Takes the line o󰀨-hook; press this button to answer a call or you can direct a
call from your aux phone through the hybrid.
2. Drop Button
Press this button to drop (hang up) a call.
3. Send Level
Adjusts the signal that you are sending down the telephone line.
4. Caller Level
Adjusts the level of the incoming caller’s audio as it is going out the output
jacks. If the incoming caller level is too high and peaking the red -3 dB
LED, you may need to change the setting of an internal jumper. Please see
Optional Jumper Settings on page 9.
5. Send-to-Mix Level
Adjust the level of your audio that will be sent to the <Mix Out> jack.
6. Caller-to-Mix Level
Adjust the level of caller audio that will be sent to the <Mix Out> jack.
7. Headphones
The stereo headphone jack contains the signal you have created with the
<Send-to-Mix> and <Caller-to-Mix> level controls. Both left and right
channels get the same signal.
Controls & Indicators

Controls & Indicators 3
Getting to Know Your innkeeper 1rx
Indicators Cont’d
8. Mix Monitor
Adjusts the mix signal level sent to the headphone and rear panel
speaker terminals.
9. Power LED
Lit when unit is plugged in and receiving power.
10. Ring LED
Flickers when you have an incoming call.
11. OH LED
Lit when you are on line with a call (o󰀨-hook).
12. Signal LEDs
Send LEDs represent the signal level going out to the telephone line.
Receive LEDs represent the signal level coming from the phone line,
after the DSP.
13. AGC - Automatic Gain Control
When enabled, automatically adjusts the gain of caller audio so all callers
are received at an average level.
14. Caller Ducking
When enabled, innkeeper 1rx lowers the caller’s audio level by 9 dB when
local audio is present.
15. Presence
When enabled, this feature boosts the low end of the caller audio signal.
Presence is added to the caller audio signal only.
16. 1 kHz Tone Generator
Press button once to send a full scale 0 dB, maximum output level 1kHz
tone down the phone line. Press again to send this signal out the Caller
jack. Press a third time to turn o󰀨.
17. Auto-Answer
When enabled, innkeeper automatically answers an incoming call and
then disconnects after the caller hangs up. Auto answer will occur on the
rst ring.

4innkeeper 1rx™ Digital Hybrid
Getting to Know Your innkeeper 1rx
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.
3. Caller Output
Male balanced XLR line-level output contains only the callers voice.
4. Mix Output
Male balanced XLR line-level output contains a mix of send and receive
audio determined by the <Send-to-Mix> and <Caller-to-Mix> level controls.
5. Mic / Line switch
Sets the front end sensitivity of the Send XLR jack. Set to <Mic> if you
intend to connect a dynamic microphone directly to the <Send> jack. Set to
<Line> if you are connecting to the output of a mixer. This device does not
provide phantom power for a condenser type microphone.
6. Send Input
Female balanced XLR input for signals going into the phone line.
Mic or line level input.
3 4 5 6 7 981 2

Inputs & Outputs Cont’d
7. Remote Control Jack
10 pin RJ-50 modular jack for connection to:
A. RS-232 Cable (Included)
B. JK Audio RIU-IP Remote Interface. See page 11.
C. JK Audio Guest Module 1 Remote Keypad. See page 11.
D. JK Audio Concierge Switch Core
8. Remote Terminals
Screw terminals provide connections for a small speaker, remote LEDs,
tape recorder control, or console call control switches.
1. Speaker (+) Minimum 8 ohms, 1 watt max
2. Speaker (-) Use together with terminal 1
3. Ring LED Supplies +4.3 VDC,
40 mA pulse signal during incoming ring cycles.
4. Chassis Ground
5. OH LED Supplies +4.3 VDC,
40 mA steady signal during an active call.
6. Call (NO) Pull this pin to ground momentarily to simulate
pressing the <Call> button.
7. Drop (NO) Pull this pin to ground momentarily to simulate
pressing the <Drop> button.
8. Reserved
9. Power Jack
Universal AC power input for 100-240 Volt, 50-60 Hz supply current.
Inputs & Outputs 5
Getting to Know Your innkeeper 1rx

6innkeeper 1rx™ Digital Hybrid
Setting Up
1. Connect the supplied RJ-11 phone line cable between the jack marked
<Line> and your wall jack. Be sure this jack supports standard single line
analog telephone operation.
2. Connect to your mixer using the Mix-Minus method. 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 1rx will cause an echo, or
feedback.
1. Connect a microphone or mixing console output XLR cable to the
<Send> jack on the innkeeper. Be sure to set the innkeeper <Mic/Line>
switch to the proper position for your application.
2. Connect the <Caller> jack to a line level input on your mixing console.
For whichever input channel you have the <Caller> connected to on
the mixer, 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 a󰀨ect what is heard on the Main outputs or
on any other Aux buses. We recommend using an <Aux Send> bus
that is pre-fader, so you can use the fader controls to set the levels
of each channel to the main output without a󰀨ecting what is sent to
the phone line. 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 1rx
<Send>. Or, you may use an external Mix-Minus box that will create
this signal for you.
3. Connect the supplied AC power cord to the back of the innkeeper and then
to an AC power outlet.
Your innkeeper 1rx is now ready to take calls. You may want to connect an
auxiliary telephone to the innkeeper <Phone> jack so you can dial out and set up
calls, or use the <Auto-Answer> feature to answer incoming calls.
Place a test call to a quiet location. 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

7
Getting Connected
GUEST MODULE 1
Figure 7a
MIC
1 2 3/4 5/6 7/8
MIC MIC MIC
L L
R R
TAPE
IN
UNBALANCED
MAIN
METERS
USB
INPUT LEVEL L R
TAPE
OUT
INSERT
LINE IN 1 LINE IN 2
BAL/
UNBAL
BAL/
UNBAL
MONO MONO MONO MONO
POWER
BAL/
UNBAL
BAL/
UNBAL
HI
MID
LOW
BAL/
UNBAL
BAL/
UNBAL
BAL/
UNBAL
BAL/
UNBAL
LINE IN 3
LINE IN 4
LINE IN 5
LINE IN 6
LINE IN 7
LINE IN 8INSERT ST RETURN
GAIN
EQEQEQEQ
AUX
PAN
MUTE MUTE MUTEMUTE MUTE MUTE
PAN PAN PAN PAN
FX MASTERFX TO MON PHONES TAPELEVEL
AUX AUX AUX AUX
EQ
GAINGAINGAINGAIN
FX SEND
MON SEND FOOTSWITCH
MAIN OUT PHONES
PHANTOM
POWER
STEREO GRAPHIC EQ
15
10
5
0
5
10
15
125 250 500 1K 2K 4K 8K
15
10
5
0
5
10
15
48V
M
I
C
G
A
I
N
M
I
C
G
A
I
N
M
I
C
G
A
I
N
M
I
C
G
A
I
N
U
LOW CUT LOW CUT LOW CUTLOW CUT
OL
15
10
6
3
0
2
4
7
10
30
20
HI
MID
LOW
HI
MID
LOW
HI
MID
LOW
HI
MID
LOW
MON
FX FX FX FX FX
MUTE
PRESETS
MON MON MON MON
U
U U U
MON MAIN
1 2 3/4 5/6 7/8 ST RTN FX RTN
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
00
U
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
UUUU
UUUUU
U
UUUUU
UUUUU
UUUU
U
RL
U
RL
U
RL
U
RL
U
RL
MIC
1 2 3/4 5/6 7/8
MIC MIC MIC
L L
R R
TAPE
IN
UNBALANCED
MAIN
METERS
USB
INPUT LEVEL L R
TAPE
OUT
INSERT
LINE IN 1 LINE IN 2
BAL/
UNBAL
BAL/
UNBAL
MONO MONO MONO MONO
POWER
BAL/
UNBAL
BAL/
UNBAL
HI
MID
LOW
BAL/
UNBAL
BAL/
UNBAL
BAL/
UNBAL
BAL/
UNBAL
LINE IN 3
LINE IN 4
LINE IN 5
LINE IN 6
LINE IN 7
LINE IN 8INSERT ST RETURN
GAIN
EQEQEQEQ
AUX
PAN
MUTE MUTE MUTEMUTE MUTE MUTE
PAN PAN PAN PAN
FX MASTERFX TO MON PHONES TAPELEVEL
AUX AUX AUX AUX
EQ
GAINGAINGAINGAIN
FX SEND
MON SEND FOOTSWITCH
MAIN OUT PHONES
PHANTOM
POWER
STEREO GRAPHIC EQ
15
10
5
0
5
10
15
125 250 500 1K 2K 4K 8K
15
10
5
0
5
10
15
48V
M
I
C
G
A
I
N
M
I
C
G
A
I
N
M
I
C
G
A
I
N
M
I
C
G
A
I
N
U
LOW CUT LOW CUT LOW CUTLOW CUT
OL
15
10
6
3
0
2
4
7
10
30
20
HI
MID
LOW
HI
MID
LOW
HI
MID
LOW
HI
MID
LOW
MON
FX FX FX FX FX
MUTE
PRESETS
MON MON MON MON
U
U
U U
MON MAIN
1 2 3/4 5/6 7/8 ST RTN FX RTN
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
00
U
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
UUUU
UUUUU
U
UUUUU
UUUUU
UUUU
U
RL
U
RL
U
RL
U
RL
U
RL
MIC
1 2 3/4 5/6 7/8
MIC MIC MIC
L L
R R
TAPE
IN
UNBALANCED
MAIN
METERS
USB
INPUT LEVEL L R
TAPE
OUT
INSERT
LINE IN 1 LINE IN 2
BAL/
UNBAL
BAL/
UNBAL
MONO MONO MONO MONO
POWER
BAL/
UNBAL
BAL/
UNBAL
HI
MID
LOW
BAL/
UNBAL
BAL/
UNBAL
BAL/
UNBAL
BAL/
UNBAL
LINE IN 3
LINE IN 4
LINE IN 5
LINE IN 6
LINE IN 7
LINE IN 8INSERT ST RETURN
GAIN
EQEQEQEQ
AUX
PAN
MUTE MUTE MUTEMUTE MUTE MUTE
PAN PAN PAN PAN
FX MASTERFX TO MON PHONES TAPELEVEL
AUX AUX AUX AUX
EQ
GAINGAINGAINGAIN
FX SEND
MON SEND FOOTSWITCH
MAIN OUT PHONES
PHANTOM
POWER
STEREO GRAPHIC EQ
15
10
5
0
5
10
15
125 250 500 1K 2K 4K 8K
15
10
5
0
5
10
15
48V
M
I
C
G
A
I
N
M
I
C
G
A
I
N
M
I
C
G
A
I
N
M
I
C
G
A
I
N
U
LOW CUT LOW CUT LOW CUTLOW CUT
OL
15
10
6
3
0
2
4
7
10
30
20
HI
MID
LOW
HI
MID
LOW
HI
MID
LOW
HI
MID
LOW
MON
FX FX FX FX FX
MUTE
PRESETS
MON MON MON MON
U
U
U U
MON MAIN
1 2 3/4 5/6 7/8 ST RTN FX RTN
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
10
dB
10
20
30
5
5
U
00
U
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
UUUU
UUUUU
U
UUUUU
UUUUU
UUUU
U
RL
U
RL
U
RL
U
RL
U
RL
Getting Connected

8innkeeper 1rx™ Digital Hybrid
Send Signal Level
The <Send> LEDs display the signal level as it goes out to the phone line. 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 the <Send> level control
until you see occasional ashes of the second green LED (-9dB) and very rarely
any 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.
Receive Signal Level
The <Receive> LEDs display the signal coming from the phone line and out of
the DSP. The <Caller> level control does not change what you see on these
LEDs. Adjust the <Caller> level control to give you the best signal at your
equipment.
AGC
When the Automatic Gain Control <AGC> is used, innkeeper 1rx automatically
adjusts the <Caller> level to maintain acceptable levels between calls. In this
way an unusually loud caller will be similar in level to the unusually soft caller.
Caller Ducking
The Caller <Ducking> option lowers the level of the Caller’s audio by 9 dB when
local audio is present. This is a good way to regulate those obnoxious callers
when the talent is speaking.
Presence
The <Presence> feature is a custom digital lter that boosts low frequencies in
the 120Hz to 500Hz region to compensate for losses in the telephone network.
This is a single ended algorithm that treats only the Caller signal before it leaves
the digital hybrid. You may notice that it has more of an e󰀨ect on low pitched, or
deeper voices.
1 kHz Tone Generator
The <1 kHz tone> generator is a three-state button used for setting levels on
your other equipment. It is not used to null the phone line. When pressed once a
full scale 0dB maximum output level signal is sent down the phone line. This will
allow you to calibrate levels at the other end of the call. When pressed again, this
same signal is sent to the <Caller> output only. This will allow you to calibrate the
signal level at your console. The tone generator is disabled when pressed a
third time.
Auto-Answer
The <Auto-Answer> feature will answer on the rst ring. When <Auto-Answer>
is enabled, you can still make calls manually using the <Call> button.
When nished, you can either drop the call manually or allow the call to
Auto-Disconnect. innkeeper will look for a CPC (Calling-Party-Control)disconnect
signal or ROH (Receiver-O󰀨-Hook) message from the phone company to
determine when a call has disconnected. This can take up to a minute.
Operation

Auxiliary Telephone
innkeeper 1rx does not disconnect the auxiliary telephone when you press the
<Call> button. You can use an auxiliary phone to place or screen a call and then
place it on hold. When you are ready to take the call on innkeeper 1rx, simply
press the <Call> button. Your telephone will automatically release the hold. If you
need to take the call back on the aux telephone, simply pick up the telephone
handset before the innkeeper 1rx <Drop> button is pressed. If you prefer to
disconnect the aux phone when the hybrid takes a call, please refer to the
Optional Jumper Settings section below for Jumpers 2 and 3.
Optional Jumper Settings
MUST BE PERFORMED BY QUALIFIED SERVICE PERSONNEL. To change the
setting of an internal jumper, disconnect power from the hybrid before
removing the cover of the innkeeper 1rx. The default jumper position is
Closed (covering both pins). To Open the jumper, remove the jumper or
cover just one pin.
WARNING! TheAC cable must be unplugged from the back of
the innkeeper any time the case is opened. Failure to follow
these instructions could result in in injury or death.
Jumper 1: Attenuation
If the incoming caller level is too high and peaking the red -3 dB LED,
change Jumper 1 to the Open position. This will provide 6 dB attenuation of
the incoming audio signal. This does not a󰀨ect transmit level.
REPLACEAND SECURE THE COVER BEFORE RECONNECTING THE POWER CORD.
Jumpers 2 & 3: Auxiliary Telephone
In the factory default Closed position, the <Line> jack and <Phone> jacks
are Bridged.
In the optional Open position, the jacks are Switched.This means that when
the <Call> button is pressed, any phones connected to the phone jack of the
innkeeper are disconnected.
REPLACEAND SECURE THE COVER BEFORE RECONNECTING THE POWER CORD.
9
Conguration
Conguration

10 innkeeper 1rx™ Digital Hybrid
Conguration
Custom Dry Line Installation
Innkeeper 1rx was designed to work on standard (wet) telephone lines as well as
on custom PBX (dry) lines. Dry line installation is always a custom conguration
and requires substantial telephone system knowledge. These installations are
found in radio and television studios for both PBX and intercom applications.
Wet lines are typical tip / ring telephone lines that carry ring voltage, talk battery,
and full duplex, balanced audio over two wires to an analog telephone. Dry lines
carry the balanced, full duplex audio but without the ring voltage or talk battery.
Innkeeper does allow dry line operation with a few limitations:
• If talk battery is not present when the <Call> button is pressed, a dry line is
assumed.
• If talk battery suddenly appears during a dry line call, it becomes a wet line
call, and auto-disconnect will occur when a disconnect signal occurs, or if
talk battery disappears.
• Auto-answer does not work on a dry line.
• The aux telephone jack will not support an analog telephone during a dry
line call.

Optional Remote Control Devices 11
RIU-IP (Sold Separately)
This remote control interface was designed for use with innkeeper 1rx as well as
JK Audio innkeeper 2 and innkeeper 4 digital hybrids. This unit contains a web
server which allows the user to send and receive control data through their web
browser. RIU-IP can be connected to the user’s computer NIC card for direct
control, to a switch or hub for network control, or to an Ethernet port with internet
access for control from anywhere in the world. Product sold separately.
RIU-IP Features and capabilities when used with innkeeper 1rx:
• RJ-45 Ethernet port
• RS-232 remote control port with simple ASCII protocol
• No external power required
• Indication of incoming ring
• On-Hook and O󰀨-Hook
• Conrmation of O󰀨-Hook or On-Hook transition
• Place call on hold or release hold.
• Dial (number) (line).
• Auto-Answer: On / O󰀨
• Test Tone: Start / Stop
• Presence: On / O󰀨
• Caller Ducking: On / O󰀨
• Automatic Gain Control: On / O󰀨
Guest Module 1 (Sold Separately)
This convenient device gives you remote access to the on-hook/o󰀨hook and
dial features of the innkeeper 1rx. The <Call> button will icker when a call
comes in and will stay lit while a call is present. When you dial out using the
Guest Module 1 keypad, the tones are sent directly down the phone line, and do
not come back blasting in your ear. Product sold separately.
Guest Module 1 Features:
• Ring and Call LED
• Call and Drop Buttons
• DTMF Keypad
• Keypad Disable Switch
• Remote Powered
Optional Remote Control Devices

12 innkeeper 1rx™ Digital Hybrid
Serial Port Interface
ASCII Command Remote Control
innkeeper 1rx digital hybrids built after April 2007 include an RS-232 interface for
remote control applications. The enclosed CN081 serial port cable connects to
the <Remote> jack on the back of the innkeeper 1rx.
The port is congured with:
Baud Rate Data Bits Stop Bits Parity Flow Control
9600 8 1 None None
The serial port accepts the following ASCII commands:
All commands begin with the ‘/’ character, and will be automatically executed
whenever a carriage return ‘<-’, or the next ‘/’ character is received.
n= Parameter value for the command.
s= Digit string used in manual dialing mode (up to 20 digits).
Command Name n Parameter / Description
/? Help Returns command help menu to user screen.
/AT or // Version Returns product series type and operational status.
/BRn Baud Rate
Control n = 0 n = 1 9600 115.2k Requires rmware v3.4 or later
/CF Conguration Returns product series type and option conguration.
/ST/ Line Status On-hook = 0, Off-hook = 1, Ring = 2
Esc Escape Clears / escapes current command before execution.
/CL Line Call Off Hook [Call]
/DR Line Drop Hang Up [Drop]
/HDn Line Hold n = 0
n = 1 OFF HOLD Takes line off Hold* *Requires rmware v3.4 or later
/AGn AGC n = 0
n = 1 OFF ON TurnsAGC Off. TurnsAGC On.
/DKn Ducking n = 0
n = 1 OFF ON Turns Ducking Off. Turns Ducking On.
/PRn Presence n = 0
n = 1 OFF ON Turns Presence Off. Turns Presence On.
/AAn Auto-Answer n = 0
n = 1 OFF ON Turns Auto-Answer Off. Turns Auto-Answer On.
/TTn Test Tone n = 0
n = 1
n = 2
OFF
SEND
CALLER
Turns Test Tone Off
Transmit 1 kHz tone into phone line
Transmit 1 kHz tone to Caller XLR
/VBn(+) Verbose
Mode n = 0 n = 1
n = 2
n = 3
n = +
OFF
LEVEL
LEVEL 2
MAX ON
Echo Off & Unsolicited Responses Off.
Echo Off & Abbrev. Responses Active.
Echo On & Expanded Responses Active.
Echo On & All Responses Active.
Turns On Line Termination Char ‘/’.

FAQs 13
FAQs
ASCII Command Remote Control Cont’d
Command Name n Parameter / Description
/DIs Dial Take line off-hook and dial phone number.
‘,’ Each comma will insert a one second pause in the digit string
(Max Delay = 5 sec).
‘!’ To insert a ash hook in the digit string.
The following unsolicited responses will inform you of changes in call state.
ONHK The line has been disconnected.
OFFHK The line is off-hook.
RING Incoming call.
FAQs
1. Does the innkeeper 1rx send a burst or beep down
the phone line at the beginning of each call like our
current hybrid?
No. Innkeeper 1x uses the actual transmit signal to evaluate the phone line
and tune its algorithm. As you begin to speak, innkeeper 1x is hard at work
canceling your voice from the Caller Output jack. Within milliseconds your
voice is reduced into the noise oor.
2. Will your innkeeper 1rx provide phantom power for my
condenser microphone?
No, our devices will not provide phantom power. If you plan to connect your
microphone directly to an innkeeper 1x, you should use a dynamic mic.
3. Are there more ASCII commands I can send through the
serial cable or can I add my own?
The complete list of currently acceptable commands is listed on page 12.
4. Where is the software to control the serial port?
There is no software provided with the innkeeper 1rx. You will provide your
own terminal emulator, such as Hyper-Terminal.
5. How do I know what rmware my innkeeper 1rx is running on
and how can I update it?
Contact [email protected] for possible rmware updates.

14 innkeeper 1rx™ Digital Hybrid
Technical Information
Phone Line
Jack
Phone
Jack
Speaker
Terminals
Headphone
Monitor
Level
Caller
Out
Mix
Out
Caller
Caller Mix
Send Mix
Mic/Line
Send
Input
Send Level
Digital Hybrid
Block Diagram

Input Impedance / Level
Balanced Female XLR: 1k ohms / 15 mV RMS; -34 dBu nom.;
Mic/Line Pad Switch = +6 dBu max
Output
Balanced Male XLR: 200 ohms / 500 mV RMS; -4 dBu nom.;
+14 dBu max; Caller Only
1/4” Stereo Headphone: 8 ohms / 250 mW per channel
Speaker Screw Terminals, 8 ohms, 1 watt
Misc
Phone Line: RJ11C
Aux Phone: RJ11C
Ringer: 0.8B REN
Isolation: 1500 VAC
Frequency Response: Telephone Side 200 Hz-3.6 kHz
Remote Control:
ASCII RS-232 (DB9)
Screw Terminal I/O
IP Web Server (optional)
Recommended
Operating Temperature: -20°C to +40°C
Power: 120-240 VAC Power Supply
Size: 1.75” x 7.3” x 19” (4.5 x 18.6 x 48.3 cm)
Weight: 5.7 lbs (2.6 kg)
Specications
Technical Information 15
Technical Information

16 innkeeper 1rx™ Digital Hybrid
Declaration of Conformity
Manufacturer’s Name:
Manufacturer’s
Address:
JK Audio, Inc.
1311 E 6th Street
Sandwich, Illinois 60548 USA
Declares that the product:
Product Name:
Model Numbers: innkeeper 1rx Digital Hybrid innkeeper 1rx
Conforms to the following Product Specications:
Safety:
ESD:
Emissions:
Telecom:
EN 60950 / AS/NZS 60950:2000
CAN/CSA-C22.2 No. 60950-01-03
EN 55024:1998; EN 61000-3-2; EN 61000-3-3
EN 55022:1998
AS/NZS CISPR 22 (2002)
FCC Part 15, Subpart B
ICES-003
AS/ACIF S002:2001
FCC CFR 47, Part 68
Declaration of Conformity