JK Audio Universal Host User Manual

Warranty

Universal Host is covered by a 2-year warranty to be free
from defective workmanship and materials. In the event that
the Universal Host needs repair, you must call us to get an
authorization, and then carefully pack and ship it to us. You
will pay for shipping to us and we will pay for return back to
you, UPS ground. No free repairs will be made if the defect
was caused by misuse, weather conditions, or other cause,
except for defective workmanship or materials. THERE ARE
NO EXPRESSED OR IMPLIED WARRANTIES WHICH
EXTEND BEYOND THE WARRANTY HERE MADE.

Universal Host

Desktop Digital Hybrid

1010

JK Audio, Inc. 1311 E 6th Street, Sandwich, IL 60548 USA

Voice: [phone] Toll Free: 800-JK-Audio Fax: [phone]

[e-mail] www.jkaudio.com

Copyright © 2010 JK Audio, Inc. All Rights Reserved.

User Guide

JK Audio

Introduction

FCC Registration (continued)

Universal Host will allow you to send and receive audio through
your multi-line PBX, ISDN, VoIP 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. The USB feature will function as a remote sound card when
connected to your computer, eliminating the need for another audio
interface with more cables and level adjustments. No additional
software drivers are needed for the USB audio interface.

What is a Digital Hybrid?

The Universal Host 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 audio signals from the
telephone 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 Universal Host 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.

b) The telephone equipment's FCC registration number. This

can be found on the bottom of your telephone equipment,
and,

c) The ringer equivalence number (REN) for this equipment.

The REN is used to determine the quantity of devices which will

be connected to the telephone line. Excessive RENs on the
telephone line may result in the devices not ringing in response
to an incoming call. In most, but not all areas, the sum of the
RENs should not exceed 5.0. To be certain of the number of
devices that may be connected to the line, as determined by the
total RENs, contact the local telephone company.

3. Repair Instructions

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. 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 instructions outlined under the warranty
section of the manual.

4. Rights of the telephone company

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 your right to file a complaint
with the FCC.

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'll be notified by your telephone company.

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15

FCC Part 15 Compliance

Features

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 Registration

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.

1. Connection and use with the nationwide telephone
network

The FCC requires that you connect this telephone equipment

to the national telephone network through a USOC RJ-11C
modular telephone jack.

This equipment may not be used with Party Line Service or

Coin Telephone Lines.

This equipment is hearing aid compatible.

2. Information for the telephone company

Upon request from your local telephone company, you are

required to provide the following information:

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

(that is, your telephone number), and

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9 10

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1. Handset Button - Press this button to use the handset as if you
were on a normal telephone call.

2. Online Button - Press this button to disable the handset and
activate the Universal Host 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 input.

5. Caller Level - Adjusts the level of the signal coming in from the
telephone line, 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. Hybrid/USB - Selects audio heard at the headphone output.

8. Headphones - The 3.5mm stereo headphone jack contains
either a mix of both the Send input audio and the Caller audio
when the button is in the Hybrid position or stereo audio from
the USB port with the button in the USB position.

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

10. Send LEDs - Displays the signal level going to the phone line.

11. Power LED - Lit when unit is plugged in and receiving power.

12. Receive LEDs - Displays the signal level coming from the
telephone, after the DSP. This signal level will not change
when you adjust the Caller knob.

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