A WELL BEHAVED HARDWARE DATA OPERATED MUTE (DATA OPERATED SQUELCH)
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2002-Apr-04
Many communications systems use the same wire line or communications link for both data and voice. It is usually annoying and unnecessary for the users ofthe system to hear the data. As data and voice are never present at the same time, a data operated squelch (DOS) can mute the audio path during data. Unfortunately, the DOS data detector can be falsed by the voice information. Using audio filtering ahead of a data detector will not protect it from falsing as voice contains the frequencies used by the data detector.