The Barrett 2061 HF phone patch provides an interface between an HF network and the International telephone network, allowing HF stations to be connected to telephone subscribers and vice versa.

The HF network user provides the base station operator with the telephone number required. The operator dials the number on the telephone connected to the 2061 interface unit. When the telephone subscriber answers, the station operator switches the 2061 to "CONNECT". The automatic VOX is activated and the call between the HF network station and the telephone subscriber proceeds automatically, the transmitter being keyed by the telephone subscriber's voice. During the call the station operator can speak to both parties by using the “OPERATOR OVERRIDE” switch. At the completion of the call the station operator switches the 2061 to "DISCONNECT".

The Barrett 2061 uses a unique adaptive hybrid to convert the four-wire audio from the transceiver to two-wire audio for the phone line. An adaptable hybrid, implemented with digital signal processing (DSP), provides continually recalculated isolation between the off air HF signal and the telephone user, producing a reliable VOX signal (Voice Operated Xmit (transmit)) to key the transmitter when the telephone subscriber's voice is present. The 2061 is packaged in a 2000 series enclosure and is designed for direct interface via our standard bus cable to the Barrett 2050 transceiver. It can however be interfaced to other suitable HF transceivers.