DTMF Decoder is also used for receiving data transmissions over the air in amateur radio frequency bands. DTMF Decoder / Encoder DTMF Decoder is a very easy to use program to decode DTMF dial tones found on telephone lines with touch tone phones.
**Minimum System Requirements: Microsoft Windows 2000/XP/Vista™/ Windows 7™ Software requires less than 10MB disk space 1.0GB RAM 16-bit full-duplex audio device or ComTekk radio interface (recommended).ĭTMF Decoder / Encoder. Call or send an email for more information. For more information on connecting to sound cards, click here.ĭirect radio interface unit supplied with kits. The author assumes no liability for damages of any kind. Notes: * If connecting directly to computer, Sound card isolators are highly recommended to prevent possible damage to sound card and computer (included in kit interface). Due to it’s technical nature, installation and alignment should only be performed by a trained, qualified avionics technician.
Use of our software is limited to the terms and conditions as provided within the included end-user license agreement (EULA) available for download at our website. We cannot guarantee the specifications of any third-party equipment used with or controlled by our software products. NOTE: For best results, we highly recommend using our Universal Radio Interface, which has a temperature-stabilized quartz oscillator for highly accurate tone encoding. Accuracy is critical, as the tone frequencies must be very precise in order to be decoded by the aircraft's electronic decoder. ComTekk SELCAL includes a convenient auto-calibration system which compensates for errors in the sound card's timebase, ensuring accurate tones are produced. The first two digits comprise the first tone pair, and the last two digits determine the second pair of tone frequencies.
Each digit or letter in the code sequence refers to an audio tone frequency. ComTekk SELCAL (meets ARINC-714 / ICAO Annex 10 international standard) is a dual-tone (2x2) format similar to DTMF, but uses 16 different tone frequencies. This way, they do not have to be distracted by radio traffic intended for other planes. This allows the receiver audio to be muted until that code is received, alerting the crew there is a radio call for them. The SELCAL decoder on board each aircraft is assigned a unique 4-letter code. (Note: EIA tone-remote is not currently supported by ComTekk SELCAL) SELCAL is an international signaling protocol which allows airline radio operators to contact specific aircraft over HF of VHF radio while in flight. ComTekk's SELCAL system is compatible with virtually any radio when used with the Universal Radio Interface. How it works: ComTekk SELCAL generates Aviation SELCAL or selective-calling tones using your computer's sound card.