JK Audio Innkeeper PBX VoIP/PBX Desktop Digital Hybrid User Guide

JK Audio Innkeeper PBX VoIP/PBX Desktop Digital Hybrid

Features

In the Box

• Universal Power supply with detachable cord
• RJ22 Handset Jumper Cable

Overview

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 tele- phone 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 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.

Getting to Know Your innkeeper PBX

Controls & Indicators

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.

5. Caller Level
   Adjusts the level of the incoming caller’s audio as it is going out the output jacks.

6. Headphone Level
   Adjusts the signal level coming from the 3.5mm front panel headphone jack.

7. Headphone
   The 3.5mm stereo headphone jack contains a mix of both the Send input audio and the Caller audio.

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 level control so that you rarely see flashes of the red -3dB peak LED. These flashes 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 volume control for the input that is causing the clipping.

10. Power LED
    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 knob. The level control knob does not change what you see on these LEDs. Adjust the

    level control to give you the best signal level at the XLR output or the Caller channel of the mini jack.

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
   Sets the front end sensitivity of the Send 1 XLR jack. Set to if you intend to connect a dynamic microphone directly to the Send 1 jack. Set to

   if you are connecting to the output of a mic mixer.

7. Send 2 Mono Input
   3.5mm mini jack input for signals going into the phone line. Line level.

8. Stereo Output
   3.5 mm mini jack contains both Send and Caller audio channels with levels determined by the <Send 1> and <Send 2> level controls and the

   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 Connected

Connecting to a Multi-Line Phone

1.  Connect the supplied RJ22 handset jumper cable between the jack marked 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 .
   Setting up for One Mic/Headphone (No Mixer)

3.  Connect a dynamic microphone cable to the <Send 1> jack on the hybrid. Be sure to set the Innkeeper PBX <Mic/Line> switch to the position.

4.  Connect a headphone to the front of the innkeeper PBX.

5.  Connect a stereo cable from the mini-jack on the Innkeeper PBX to the on your computer sound card or other recording equipment that has a stereo input. Continue to Step 12.
   Setting up for two or more Mics and a Mixer (Mix Minus Caller)

6.  Connect the innkeeper PBX output to any Line input on the mixer.

7.  Connect microphone(s) to the mic inputs on your mixer.

8.  Connect the mixer’s Mix-Minus bus or Aux Send output (this may be labeled FX or Mon but any Aux bus will work) to the <Send 1> input on Innkeeper PBX. Set the Innkeeper PBX <Mic/Line> switch to the Line position.

9.  If your mixer doesn’t have a mix-minus bus: Whichever input channel you have the connected to, turn the corresponding Aux control to minimum. All Aux controls for other channels 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.
   Tip: Using an Aux Send bus that is Pre-Fader allows you to control the levels of each channel to the main output without affecting what is sent to the phone line.
   10. Connect your headphones to the mixer.
   11. Use Main Outputs to send audio to recording device or broadcasting equipment inputs.
   Completing Setup

10. Connect the supplied DC power supply to the back of the Innkeeper PBX and then to an AC power outlet.

11.  Place a test call to a quiet location. Set the switch on innkeeper PBX for best audio (See page 8).

12.  Adjust the level controls so that you consistently light the green
    – 20 dB and -9 dB and rarely light the red -3 dB peak Send LED. These flashes 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. Set the control for good recording level of the caller audio at the output jack.

Configuration

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. 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 LEDs.
While speaking into the microphone, you should see the LEDs
lighting only. If the LEDs also light up while you are speaking into the microphone, you may have the switch in the wrong position. If the