JK Audio THAT-1 - Manual (Page 3)

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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 following information:
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 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:
Specifications
FCC Registration
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
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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.