Telephone hybrids (or telephone balance units) 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 cancelling 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 terminals for audio input and output from a broadcast mixer, or other professional audio source.
A large proportion of Sonifex hybrids are used in radio and television broadcasting applications for allowing external callers to be connected to the studio mixing console. Most of the other units are supplied to communication operations for allowing extremely effective conversion between 4-wire audio circuits and standard telephone lines.
The ringing detector can be used when you need to answer a call automatically, for instance, if a journalist files a report to a tape recorder over a telephone line, the call can be picked up after a set number of rings by the ringing detector. The HY-03 has a built in ring detector that is enabled by one of the configuration settings switches on the rear panel.
Sonifex is a BABT approved manufacturing facility with a licence to build telecommunications equipment and all products are compliant with BS6301, BS7002, BS415 and CTR21.
The HY-03 analogue hybrids are available in three models :
- HY-03 Single free-standing automatic analogue TBU with ringing detector.
- HY-03S Single 19” rack mounted automatic analogue TBU with ringing detector.
- HY-03T Twin 19” rack mounted automatic analogue TBU with ringing detector.
Additionally, a eurocard size analogue hybrid HY-02EC and ringing detector RD-02EC are still available from the existing HY-02 range. Eurocards are supplied without a power supply, or casing and are therefore significantly cheaper than the other units. The cards can be slotted into a rack and located by the bracket at the front of the card. They are mainly used in mixing consoles, or other systems, which have been designed specifically with slots to hold eurocard equipment.
