The JK Audio Inline Patch Telephone Audio Recorder Interface is an interface patch between telephone lines and audio devices such as speakers, amplifiers and recorders. The idea behind the Inline Patch is to provide a simple solution for anyone who requires a phone tap for the purpose of recording or amplifying telephone conversations. The Inline Patch connects between the telephone wall jack and the base of any analog or cordless telephone requiring standard RJ11C telephone cable.

Full duplex communication between the talkers is captured with great accuracy and hybrid circuitry provides a nominal 20dB of signal isolation between the transmit and receive signals. This minimizes the noise and cross-talk associated with audio over phone lines. Balanced XLR and unbalanced 1/8" (3.5mm) Send To Phone inputs allow line level audio to be fed over the phone line. A balanced XLR output isolates incoming signal from the phone line. A pair of additional 3.5mm mini outputs provide a stereo (isolated left/right) or mono mix of send, receive and line level audio signal.