The Telephone Hybrid-2 is the active version of the well known passive one. Its concept originates from many demands for a more sophisticated hybrid with more features.

The unit is an analogue unit with digital control and features like ducking making intelligibility a lot better in broadcast.
Telephone hybrids provide the interface between professional audio equipment and the public telephone network. They provide protection for your equipment and the public telephone lines, allowing for varying line signals and line conditions.
Automatically canceling out the unwanted signal they also facilitate two way communication down a single telephone line.
Each hybrid has a telephone line connection, a handset connection and separate connectors for audio input and output from a broadcast mixer, or other professional audio source.