Feeds Recorded Audio into Phone Handset



The TSA-3PB is used to provide a simple and inexpensive method of coupling audio from an external source into your desk telephone. It can be used with most telephone styles that have a standard modular handset or headset jack. Connecting between your phone and the audio output of your computer sound card, audio recorder, radio, etc., it features: isolated and adjustable audio output; RF Bypass; and a three position function switch.



The TSA-3PB is supplied with cables and connectors that have been wired to meet most applications. It can be customized to meet unusual requirements. Consult your place of purchase if cables are required with non-standard lengths or connections. On the back of this sheet is a descriptive drawing.


1. Unplug the handset cord from your telephone set and plug it into the jack on the TSA-3PB adapter.


2. Plug the short TSA-3PB cable into the handset jack on your phone. Your telephone should now function normally as you have simply connected a short extension into the handset cord.


3. The long TSA-3PB cable can now be connected to your audio source (AUX-Output, Headphone, or Speaker Jack of your cassette recorder, Computer Sound Card, AM/FM Radio, etc). The TSA-3PB couples the audio through an isolation transformer and adjustable attenuation circuitry. It feeds it into your telephone handset’s microphone circuitry (as long as the TSA-3PB’s switch isn’t in its center OFF position). If your telephone does not use standard connections, the unit may have to be re-wired so that the recorder is connected to the correct wires.


4. Set your audio source to a normal listening level. The TSA-3PB has a small screwdriver adjustment for the audio output level. Normally this control is set near its mid-range position. If your audio source is