The Clear-Com Pro TW-20 is a professional interface unit designed to bridge the gap between traditional wired or wireless intercom systems and standard 2-way radio networks, such as those used by security, facilities management, or production runners. This device allows users on a Clear-Com partyline or matrix system to communicate directly with personnel using handheld two-way radios (walkie-talkies), creating a unified communication network. It effectively converts the balanced audio and signaling of the intercom system to the unbalanced, push-to-talk (PTT) operation of a radio, and vice versa. This integration is crucial for events and facilities where key staff, like stage managers or directors, need to coordinate with roaming security teams, utility workers, or outside broadcast units that operate on separate radio frequencies.

The interface is typically housed in a compact, rack-mountable unit and features controls for adjusting audio levels between the intercom and radio sides to ensure clear, distortion-free communication. It manages the critical conversion between the continuous "always on" nature of an intercom channel and the PTT protocol of a radio. When an intercom user speaks, the interface activates the radio's transmitter (keys the PTT) and sends the audio. When a radio transmission is received, the interface routes the audio onto the designated intercom channel. Features like vox (voice-operated switching) or manual PTT control, along with ground isolation, are often included to optimize performance and prevent feedback or ground loop issues.

The Pro TW-20 provides a reliable and transparent link, ensuring that communication is clear and operational protocols are maintained on both sides. It often includes connections for an external footswitch or panel for manual PTT control and standard connectors for intercom (XLR) and radio (often a jack for a radio's headset port). By seamlessly integrating these two distinct communication technologies, the interface expands the reach of the production intercom system, ensuring that all essential personnel, regardless of their primary communication device, can be included in the coordinated flow of information, which is vital for the safety and efficiency of large-scale operations.