JK Audio THAT-1 User Manual

THAT-1

Telephone Handset Audio Tap

User Guide

JK Audio

Connection

THAT-1 connects between the handset and the base of
your telephone. Follow these simple steps…

1. Unplug the modular handset cord from your tele­phone base.

2. Using the black handset jumper cord that we have
provided, connect the Telephone jack of THAT-1 to
the handset jack on your telephone base.

3. Plug your handset cord, and handset, into the Hand-
set jack on THAT-1.

4. Connect your audio equipment to the line input and
output jacks on THAT-1.

Not for use with telephones that have a keypad in
the handset.

Handset w/
modular plug

Telephone line
to wall jack

Audio equipment or
powered speakers or
computer Mic input

2

Operation

To Phone Jack

This is a line level input for signals that you want to send
down the phone line. This jack can be connected to an
audio output such as the headphone output jack on a
tape recorder, the line output of a PC audio card, or the
line output from a CD player or audio mixer.

From Phone Jack

This is a variable mic level output from the telephone
line.This jack provides a mix of both sides of the
conversation. In other words, whatever you send down
the phone line will come back on this jack mixed with the
audio from the other side of the call. This is not
adjustable. We picked a suitable mix ratio for most
telephones.

The supplied adapter cable allows you to take the left
channel from a 1/8" mini stereo headphone or mono
microphone jack and attach it to the RCA jack on THAT-1.

3

Operation

The Handset / Line In button selects which signal will
be sent down the phone line; the handset microphone,
or the line input jack.

When the Handset / Line In button is out, you can use the
handset to speak and listen as you normally would. The
sound that you hear on the handset is always available on
the From Phone output jack.

With the button in, the handset microphone is disconnected
and the line input is connected to send audio signals down
the line.

You can also use the Handset / Line In button to turn off
the handset mic if you are listening to the line output signal
over a loudspeaker. This will prevent feedback between
the handset microphone and loudspeaker. In any case you
can always listen over the handset receiver.

If a conflict arises it will typically be on the line input side. If
you attempt to send voice band signals down the line input
jack and the distant party complains that the level is too
loud or severely distorted (clipping), try to lower the
transmit signal on your audio equipment. If this does not
help, discontinue use immediately.

Note: Not all telephones are built alike so we cannot guar-

antee THAT-1 will work with any handset design out
there. We designed the interface to work with most
popular designs.

4

FAQ’s

? I have been using my THAT-1 for recording and it

works great but when I try to send audio down the
line it won’t work.

! Several things could be causing this problem: First you

must send a line level signal into the “To Phone” jack on
THAT-1. Second, make sure the gray button is in the “In”
position. This disables the handset mic and enables the
audio input. Third, the phone you are using must have an
“electret” type mic in the handset. Not all phones are the
same and THAT-1 is only compatible for sending audio
with phones that have this microphone type. You may
want to consider our THAT-2 which has a three position
switch to allow you to use it with virtually any telephone.

? Can I get an adapter that will allow me to connect

THAT-1 to the wall jack instead of the phone?

! No, your THAT-1 doesn’t replace your phone,, but works

in conjunction with it. You will need to plug it in between
the telephone base and the telephone handset.

? What is the gray pushbutton on THAT-1 used for?
! The button is used to select which audio signal will be

sent into the telephone.
OUT = talking on the handset
IN = sending audio through the RCA jack
Keep in mind that you cannot send audio into the RCA

jack and talk on the handset at the same time. However,

any audio sent into the phone can be heard on the hand-

set and is available on the RCA output jack at all times.

5

Specifications

Line Input: Connector RCA Phono Jack
Input Impedance 20 k ohms
Level 250 mV RMS
Isolation 1500 VRMS
Line Output: Connector RCA Phono Jack
Output Impedance 2800 ohms
Level 100 mV RMS
Isolation 1500 VRMS

Handset and Telephone connectors:

Modular 4pin/4wire handset jacks

Handset Compatibility:

THAT-1 is designed to work with telephones
that have an electret type mic in the handset

FCC Registration

Your new JK Audio product has been registered with the F ederal
Communications Commission (FCC). This product complies with
the standards in Part 68 of the FCC rules. The FCC requires us to
provide the following information:

1. Connection and use with the nationwide telephone

network

The FCC requires that you connect this telephone equi pment to

the national telephone network through a FCC registered
telephone.

This equipment may not be used with Party Line Service or

Coin Telephone Lines.

2. Information for the telephone company
Upon request from your local telephone company, you are

required to provide the following information:

6

FCC Registration (continued)

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

equipment (that is, your telephone number), and

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

can be found on the bottom of your telephone equipment.

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 onl y be made by the

manufacturer or its authorized agents or by others who ma y
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 will notify you before they
interrupt service. If advanced notice is not practical, you will
be notified as soon as possible. You will be given the
opportunity to correct the problem, and you will 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 will be notified.

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

is leased or owned by another party, permission to connect
this telephone equiment to their telephone must first be
obtained.

7

Warranty

The model THAT-1 is covered by a 2 year warranty to be
free from defective workmanship and materials. In the
event that the THAT-1 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.

06/06

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 © 2006 JK Audio, Inc. All Rights Reserved.