JK Audio THAT-1 - Manual (Page 4)

4
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.
5
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.