The Clear-Com TW12B Intercom System Interface is designed for connecting one intercom system to another without compromising the audio quality of either system. The Clear-Com TW12B solves all problems that can arise when connecting, for example: a mobile production unit’s intercom system to an intercom in a nearby building same-type systems located in two different buildings to any “unknown” interface, such as a TV camera concert hall’s intercom to touring group’s intercom same-type systems located in two different buildings to any “unknown” interface, such as a TV camera concert hall’s intercom to touring group’s intercom