Omnicron Electronics - Professional Voice Logging Recorders and Accessories - since 1975 
 Professional Voice Logging Recorders  and  Accessories


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Omnicron Electronics - Professional Voice Logging Recorders and Accessories - since 1975



LIC-390 Phone Line Coupler photo

The LIC-390 isolation coupler is used to connect a logging recorder to telephone circuits, two-way radio lines, etc. It provides a balanced line-input, transformer isolation, capacitive coupling, RF bypass, and balanced line-output. A voltage sensing mute circuit prevents voice activated recorders from false triggering when the coupler is connected to a voltage controlled telephone line.
The high impedance input circuit permits connection to balanced and unbalanced audio sources, with minimal loading. No internal or external power is required, 3"L x 2"W x 1"H.
The input cable (normally terminated with a modular RJ-11 telephone style plug) should be connected to the source of audio to be monitored. If the modular plug is not used, connect the red wire in the long cable to one side of the circuit and the green wire to the other side of the circuit. Polarity is not important.

Connect the output cable (normally terminated with a 3.5mm mini-plug labeled AUX) to the audio input of your recording equipment. With Omnicron recorders this cable should plug into the "AUX" (auxiliary/line input) jack on the recorder.
If the coupler was purchased as part of a customized recording system, the cable terminations may have been changed to match your specific application.

If the coupler is connected to a standard telephone line which will have a DC voltage present when the circuit is not being used, place the "DC SENSING" switch into the "ON" position. This will turn on the noise reduction circuit built into the LIC-390. Noise on the telephone line will not be coupled to the output of the coupler when the phone is not in use and the voltage on the line is greater than 30 volts DC. When the phone is in use and the voltage drops below 30 volts DC, this circuit permits all sounds on the couplers input to reach its output. Turn the switch to the "OFF" position if you are using the coupler on two- way radio circuits, or if you do not wish to use the automatic muting circuit in the LIC-390. NOTE: LIC-390 COUPLERS NO LONGER HAVE "ON/OFF" SWITCH TO DISABLE ITS VOLTAGE SENSING AUDIO MUTING CIRCUIT. IF YOU DO NOT NEED THE MUTING FUNCTION USE THE LESS EXPENSIVE LIC-100 COUPLER.

Use of the LIC-390 coupler on telephone circuits which are not private may be regulated by local tariffs. If local tariffs apply, contact your telephone company for application assistance.
Do not use the LIC-390 on a party or pay phone line, since it will record the conversations of all parties. This would be unlawful.
Federal law 90-351 title 18, section 2511, sub section 2D, requires that at least one participant in a recorded conversation be informed of the recording. Check your state and local regulations for further guidelines.
The LIC-390 is warranted to be free from defects in materials or workmanship for 90 days from the date of purchase. Damage to products resulting from physical abuse or electrical misuse voids this warranty. Out of warranty units will be repaired for a nominal handling charge plus the cost of parts and transportation. If the unit requires service, disconnect the unit and return it to the factory or your place of purchase for repair.



                          Prevent costly mistakes - record all important phone and two-way radio conversations. Compact, economical recorders that document every word of your important conversations.       
                                   OMNICRON ELECTRONICS
                        554 Liberty Highway Unit 2, Putnam, CT  06260   

(860) 928-0377

(860) 928-6477


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