Jk audio Innkeeper pbx User manual

JK Audio

Innkeeper PBX

Desktop Digital Hybrid

User Guide

2 3

Innkeeper PBX will allow you to send and receive audio

through your multi-line PBX, ISDN or analog telephone.

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?

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 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 audio signals from the telephone in order to

properly separate transmit and receive audio. We use a 16

bit DSP to continuously monitor the audio signals from the

telephone to deliver excellent separation. Our dual-

convergence algorithm can achieve excellent trans-hybrid

loss, also known as "separation".

Ready to go?

The Innkeeper PBX controls and connectors are clearly

marked and ready for operation. The 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.

1 2 3 4 5 6

7 9

8 10 11

12 13 14 15 16 17 18 19 20

Introduction Features

2 3

Innkeeper PBX will allow you to send and receive audio

through your multi-line PBX, ISDN or analog telephone.

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?

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 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 audio signals from the telephone in order to

properly separate transmit and receive audio. We use a 16

bit DSP to continuously monitor the audio signals from the

telephone to deliver excellent separation. Our dual-

convergence algorithm can achieve excellent trans-hybrid

loss, also known as "separation".

Ready to go?

The Innkeeper PBX controls and connectors are clearly

marked and ready for operation. The 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.

1 2 3 4 5 6

7 9

8 10 11

12 13 14 15 16 17 18 19 20

Introduction Features

Handset Button - Press this button to use the handset as

if you were on a normal call.

Broadcast Button - Press this button to disable the

handset and activate the Innkeeper PBX for use as a

digital hybrid.

Send 1 Level - Adjusts the signal level that you are

sending down the telephone line, through the female

XLR input.

Send 2 Level - Adjusts the signal level that you are

sending down the telephone line, through the 3.5mm mini

jack input.

Caller Level - Adjusts the level of the signal coming in

from the telephone line, going out the output jacks.

Headphone Level - Adjusts the signal level coming from

the 3.5mm front panel headphone jack.

ON LED - Lit when you are on line with a call using the

digital hybrid within the Innkeeper PBX.

Power LED - Lit when unit is plugged in and receiving

power.

Send LEDs - Displays the signal level going out to the

telephone line.

Receive LEDs - Displays the signal level coming from the

phone line, after the DSP.

Headphones - The 3.5mm stereo headphone jack

contains a mix of both the send input audio and the caller

audio.

Handset Jack - Connect your telephone handset to this

jack.

Phone Jack - Connect this jack to the handset jack on your

telephone using the supplied handset jumper cable.

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.

Caller Output - Male balanced XLR output contains the

callers voice.

Send 1 Input - Female balanced XLR input for signals

going into the phone line. Mic or line level input.

Mic / Line switch - Sets the front end sensitivity of the Send

1 XLR jack. Set to Mic if you intend to plug a microphone

directly to the Send jack. Set to Line if you are connecting

to the line or auxiliary output of a mic mixer.

Send 2 Input - 3.5mm mono mini jack input for signals

going into the phone line. Line level.

3.5mm Output - Stereo mini jack output contains send and

receive audio determined by the send 1 and send 2 levels

and the caller level controls. Left channel contains your

local send audio and right channel contains the caller's

audio from the telephone line.

Power Jack - For connection to supplied 9VDC regulated

power supply only.

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Features (cont) Features (cont)

Handset Button - Press this button to use the handset as

if you were on a normal call.

Broadcast Button - Press this button to disable the

handset and activate the Innkeeper PBX for use as a

digital hybrid.

Send 1 Level - Adjusts the signal level that you are

sending down the telephone line, through the female

XLR input.

Send 2 Level - Adjusts the signal level that you are

sending down the telephone line, through the 3.5mm mini

jack input.

Caller Level - Adjusts the level of the signal coming in

from the telephone line, going out the output jacks.

Headphone Level - Adjusts the signal level coming from

the 3.5mm front panel headphone jack.

ON LED - Lit when you are on line with a call using the

digital hybrid within the Innkeeper PBX.

Power LED - Lit when unit is plugged in and receiving

power.

Send LEDs - Displays the signal level going out to the

telephone line.

Receive LEDs - Displays the signal level coming from the

phone line, after the DSP.

Headphones - The 3.5mm stereo headphone jack

contains a mix of both the send input audio and the caller

audio.

Handset Jack - Connect your telephone handset to this

jack.

Phone Jack - Connect this jack to the handset jack on your

telephone using the supplied handset jumper cable.

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.

Caller Output - Male balanced XLR output contains the

callers voice.

Send 1 Input - Female balanced XLR input for signals

going into the phone line. Mic or line level input.

Mic / Line switch - Sets the front end sensitivity of the Send

1 XLR jack. Set to Mic if you intend to plug a microphone

directly to the Send jack. Set to Line if you are connecting

to the line or auxiliary output of a mic mixer.

Send 2 Input - 3.5mm mono mini jack input for signals

going into the phone line. Line level.

3.5mm Output - Stereo mini jack output contains send and

receive audio determined by the send 1 and send 2 levels

and the caller level controls. Left channel contains your

local send audio and right channel contains the caller's

audio from the telephone line.

Power Jack - For connection to supplied 9VDC regulated

power supply only.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

Features (cont) Features (cont)

Connecting Cables

Although each application will require a slightly different setup,

standard configuration is as follows:

Handset cable - Connect the supplied RJ-22 handset cable

between the jack marked "Phone" on the back of Innkeeper PBX

and to the handset jack of your telephone.

Handset - Connect your telephone handset to the RJ-22 jack on

the back of the Innkeeper PBX marked "Handset".

Send Audio - Connect a microphone or mixing console output

XLR cable to the Send jack on the Innkeeper PBX. Be sure to

set the Innkeeper PBX mic/line switch to the proper position for

your application.

Caller Audio - Connect the Caller Out jack to a line level input on

your mixing console or recording device.

Power - Connect the supplied DC power supply to the back of

the Innkeeper PBX and then to an AC power outlet.

Your Innkeeper PBX is now ready to take calls.

Innkeeper PBX will disable the telephone handset when you

press the Broadcast button. Use your telephone to place or

screen a call. When you are ready to take the call on Innkeeper

PBX, simply press the Broadcast button. Make sure you do not

put the handset back in it's cradle while you are on a call. This

will still drop the call even though the handset itself is disabled.

If you need to take the call back on your telephone, simply press

the Handset button on Innkeeper PBX. This will disable the

inputs and outputs on Innkeeper PBX and connect your handset

back to the telephone.

Send Signal Level

The Send LEDs display the signal level as it goes out over 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 flashes of the red -3dB peak Send LED. These

flashes should occur 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 back down on the Send volume control for the input that

is causing the clipping.

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.

Headphone Mix

The 3.5 mm headphone jack on the front of Innkeeper PBX is

used for monitoring your call. This stereo jack contains a mix

of both sides of the conversation on each headphone channel.

The levels of this mix are determined by the Send 1 and Send

2 volume controls (for your local audio) and by the Caller

volume control. The overall audio level from this jack is

determined by the Headphones volume control.

The headphone mix allows you to monitor both send and

receive signals. The true power of the Innkeeper PBX is its

ability to separate send and caller audio. To hear this

separation you must listen to the caller output on either the

XLR or 3.5mm output jacks.

Operation Operation (cont)

Connecting Cables

Although each application will require a slightly different setup,

standard configuration is as follows:

Handset cable - Connect the supplied RJ-22 handset cable

between the jack marked "Phone" on the back of Innkeeper PBX

and to the handset jack of your telephone.

Handset - Connect your telephone handset to the RJ-22 jack on

the back of the Innkeeper PBX marked "Handset".

Send Audio - Connect a microphone or mixing console output

XLR cable to the Send jack on the Innkeeper PBX. Be sure to

set the Innkeeper PBX mic/line switch to the proper position for

your application.

Caller Audio - Connect the Caller Out jack to a line level input on

your mixing console or recording device.

Power - Connect the supplied DC power supply to the back of

the Innkeeper PBX and then to an AC power outlet.

Your Innkeeper PBX is now ready to take calls.

Innkeeper PBX will disable the telephone handset when you

press the Broadcast button. Use your telephone to place or

screen a call. When you are ready to take the call on Innkeeper

PBX, simply press the Broadcast button. Make sure you do not

put the handset back in it's cradle while you are on a call. This

will still drop the call even though the handset itself is disabled.

If you need to take the call back on your telephone, simply press

the Handset button on Innkeeper PBX. This will disable the

inputs and outputs on Innkeeper PBX and connect your handset

back to the telephone.

Send Signal Level

The Send LEDs display the signal level as it goes out over 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 flashes of the red -3dB peak Send LED. These

flashes should occur 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 back down on the Send volume control for the input that

is causing the clipping.

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.

Headphone Mix

The 3.5 mm headphone jack on the front of Innkeeper PBX is

used for monitoring your call. This stereo jack contains a mix

of both sides of the conversation on each headphone channel.

The levels of this mix are determined by the Send 1 and Send

2 volume controls (for your local audio) and by the Caller

volume control. The overall audio level from this jack is

determined by the Headphones volume control.

The headphone mix allows you to monitor both send and

receive signals. The true power of the Innkeeper PBX is its

ability to separate send and caller audio. To hear this

separation you must listen to the caller output on either the

XLR or 3.5mm output jacks.

Operation Operation (cont)

Inputs:

Send 1:

Send 2:

Outputs:

Balanced:

Unbalanced:

Headphone:

Phone Jack:

Handset Jack:

Isolation:

Frequency:

Response

Power:

Size:

Weight:

Balanced Female XLR, 1k ohm, -10 mV RMS

(-35 dBv nom)

Mic/Line pad switch = +4 dBv max

3.5mm mono,20k ohm, 250 mV RMS (-10

dBv nom)

Male XLR, 200 ohm, 500 mV RMS (+4 dBv

max)

3.5mm stereo, 50 ohm, 250 mV RMS (0 dBv

max), Left = send, Right = caller

3.5mm stereo, 8 ohms, 250 mW mixed send

and caller in both channels

RJ22

1500 VAC

telephone side 200 Hz - 3600 Hz

120-240 VAC power supply (included)

9 VDC regulated center +

7" x 6" x 1.6" (18 x 15 x 4.2 cm)

2.2 pounds (1 kg)

Specifications

ABC Selector Switch

Use this switch to select the correct type of handset microphone

that your telephone uses. A=Electret, B=Carbon, C=Dynamic.

Trial and error seems to work best in determining which handset

type to use. 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. In

order to determine the correct position, you must place a call to a

nearby telephone, then try to send audio into the Innkeeper PBX

through the inputs. While doing this, switch between the three

different handset type positions. Choose the position that works

best by monitoring the audio quality and send LED's.

Although not conclusive, the following guidelines may help:

The majority of newer telephones have electret type

microphones and will use the "A" position.

Older telephones that have the round "screw type" handsets

contain carbon microphones and use the "B" position.

Many Radio Shack ,Panasonic , and Nortel telephones have

dynamic microphone types and use the "C" position.

R R R

Inputs:

Send 1:

Send 2:

Outputs:

Balanced:

Unbalanced:

Headphone:

Phone Jack:

Handset Jack:

Isolation:

Frequency:

Response

Power:

Size:

Weight:

Balanced Female XLR, 1k ohm, -10 mV RMS

(-35 dBv nom)

Mic/Line pad switch = +4 dBv max

3.5mm mono,20k ohm, 250 mV RMS (-10

dBv nom)

Male XLR, 200 ohm, 500 mV RMS (+4 dBv

max)

3.5mm stereo, 50 ohm, 250 mV RMS (0 dBv

max), Left = send, Right = caller

3.5mm stereo, 8 ohms, 250 mW mixed send

and caller in both channels

RJ22

1500 VAC

telephone side 200 Hz - 3600 Hz

120-240 VAC power supply (included)

9 VDC regulated center +

7" x 6" x 1.6" (18 x 15 x 4.2 cm)

2.2 pounds (1 kg)

Specifications

ABC Selector Switch

Use this switch to select the correct type of handset microphone

that your telephone uses. A=Electret, B=Carbon, C=Dynamic.

Trial and error seems to work best in determining which handset

type to use. 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. In

order to determine the correct position, you must place a call to a

nearby telephone, then try to send audio into the Innkeeper PBX

through the inputs. While doing this, switch between the three

different handset type positions. Choose the position that works

best by monitoring the audio quality and send LED's.

Although not conclusive, the following guidelines may help:

The majority of newer telephones have electret type

microphones and will use the "A" position.

Older telephones that have the round "screw type" handsets

contain carbon microphones and use the "B" position.

Many Radio Shack ,Panasonic , and Nortel telephones have

dynamic microphone types and use the "C" position.

R R R

10 11

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

instructionsoutlinedunderthewarrantysectionofthemanual.

4. Rightsofthetelephonecompany

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

yourrighttofileacomplaintwiththeFCC.

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'llbenotified.

If this telephone equipment is to be used with a telephone that is

leased or owned by another party, permission to connect this

telephone equipment to their telephone must first be obtained.

FCC Registration (cont)

FCC Registration

1. Connectionandusewiththenationwidetelephonenetwork

The FCC requires that you connect this telephone equipment to

the national telephone network through a FCC registered

telephone.

This equipment may not be used with Party Line Service or Coin

TelephoneLines.

2. Informationforthetelephonecompany

Upon request from your local telephone company, you are

requiredtoprovidethefollowinginformation:

a) The "line" to which you will connect the telephone equipment

(thatis,yourtelephonenumber),and

b)Thetelephoneequipment'sFCCregistrationnumber. Thiscan

befoundonthebottomofyourtelephoneequipment.

3. RepairInstructions

If 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.

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. The FCC requires us to provide the

followinginformation:.

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 Part 15 Compliance