73M2901 Ring Detection Using Optocouplers

By: Jeff Sorensen

Abstract: Due to their simplicity and ease of use, optocouplers have been used for telecom ring detection for many years. This application note discusses how the Teridian 73M2901CE, a single-chip V.22bis modem, uses optocouplers and provides software support to detect any telecom ring signal that is likely to exist.