Telephone Hybrids or Talkshow Systems convert an incoming phone call into an Audio signal which is suitable for the studio environment. There are typically three different line interfaces that are used: POTS (analogue telephone lines), ISDN or Ethernet interfaces using the Voice over IP technology.

Audio Codecs are needed for high-quality Audio transmissions over different networks like IP, ISDN, 2-Mbit/s (E1) and X.21. Over IP and ISDN, both Leased Line connections as well as temporary dial-up connections can be used. There is a wide range of applications in which Audio Codecs are required, such as e.g. reporting, studio programme contribution and distribution as well as Studio-Transmitter-Links.

The digital broadcast technology DAB (Digital Audio Broadcasting) is a broadband system, with which several programmes (Audio and data services) can be transmitted from one or more programme providers in one Ensemble.