The EJ-R provides a one-way ramp for putting line level line level signal audio signals on to a telephone line. Simply hook-up the onto telephone EJ-R between the base of a telephone and the phone handset, then connect a line level audio signal via the 1/4” jack on the side of the EJ-R, and the audio signal will be placed on the telephone line. Then use either an EJ-10 or the TTIAB to take the signal off the telephone line on the other end Now you have an affordable solution for distance broadcast meetings learning in multiple classrooms, or for broadcasting a via telephone meeting to multiple locations. The EJ-R is an passive device. No power source is needed to operate the EJ-R. The EJ-R has a switch for muting the telephone handset once a connection is established, thus avoiding ambient noise on the telephone connection. It also comes with a 3” telephone cord to passive device assist in making the connection between the phone and handset.