3033 - 'TRI' Telephone Recording Interface

The Telephone Recording Interface is used to automatically record all conversations that take place on the target phone line to a tape recorder (not supplied). It only operates the tape machine while the phone is in use so no tape is wasted or left blank.

The TRI is connected in parallel with the phone line and to the any tape recorder's REMOTE (see note below) and MIC sockets. The TRI can also be used with voice activated tape recorders/personal dictation machines. These only need to have a MIC socket as the voice activation circuitry will automatically start and stop the recorder as the phone is used.

The TRI will operate recorders with 1.5-12V battery systems and it also has an onboard polarity switch so that it can be used with either positive or negative wired REMOTE sockets.

Technical Specifications
Power Supply	none (powered from phone line)
Phone Line Input	Crocodile clips
MIC Output	3.5mm audio jack plug
REMOTE Output	2.5mm audio jack plug
Board Dimensions	50x33x15mm
Product Format	Electronic Kit (KT ) or Assembled (AS) more
Documentation	User Manual

• This product does not have BT approval. It is against the law to record telephone conversations without consent.
• NOTE: Cassette recorders with REMOTE sockets are quite difficult to obtain now but any machine that takes batteries and has a MIC socket can be easily adapted. The REMOTE socket is simply a 2.5mm jack socket (one with break contacts) that is connected in series with the low voltage positive power lead that comes from the battery compartment inside the cassette player. To install a socket you simply cut the lead and connect the jack plug in series so that power runs through the closed contact when no jack plug is inserted and through the TRI when the jack plug is inserted. It really is that easy.