Sonifex HY-03

Sonifex HY-03

Telephone hybrids, or telephone balance units (TBUs) 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.

Sonifex offer a full range of automatic analogue and digital telephone hybrids.

Outstanding Quality From Industry Standard Telephone Hybrids

Telephone hybrids, or telephone balance units (TBUs) 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 telephone 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.

A ringing detector can be used when you need to answer a call automatically, for instance, if a journalist files a report to a PC recorder over a telephone line, the call can be picked up after a set number of rings by the ringing detector. Both the HY-03 & DHY-03 have a built in ringing detector that is enabled by one of the configuration settings switches on the rear panel.

Analogue, Digital or GSM or HD Voice?

Sonifex offer a few different hybrid units:

  • The HY-03 analogue telephone hybrid.
  • The DHY-03  DSP based telephone hybrid.
  • The DHY-04 DSP based telephone hybrid.
  • The DHY-04G DSP based GSM hybrid.
  • The DHY-04HD DSP based HD Voice & GSM hybrid.

 

The analogue HY-03 hybrid is suitable for most general telephony applications and is often used in radio and TV stations, trading floors and conferencing centres. The HY-03 can be used for any application where a clean telephone signal is required and the line is not subject to signal delay.

The DHY-03 offers near perfect performance, using DSP power to dramatically improve the unit’s operation. The DHY-03 offers the features of the HY-03, but has some other benefits:

  • Echo cancellation is possible and distortion of other mixed signals is greatly improved.
  • Digital hybrids are more tolerant to fluctuating line conditions and are especially suitable for dealing with calls that have a slight signal delay, for example, satellite and conference calls. The DHY-03 can recall signals from its memory buffer and allow for these delays without impairing performance.

 

The DHY-04 is a redesign of the DHY-03 hybrid and adds Ethernet connectivity with a built-in web browser for configuration, control and dialing, combined AES/EBU digital and analogue audio inputs and front panel speed-dial buttons.

The DHY-04G uses a GSM SIM card to connect callers on the 2G/GSM cellular network to a radio/TV mixing console connected to the DHY-04G 4 wire input and output.

The DHY-04HD uses a 3G SIM card to connect callers on the 3G cellular networks using HD Voice wideband audio to provide a high quality audio call. This is ideal for broadcasters and journalists providing a frequency response up to 7kHz (twice that of a normal GSM or POTS connection). It converts 3G or GSM calls to the 4 wire audio signal to and from a connected mixing console.

Note: The HY-03, DHY-03 and DHY-04 products are operating on analogue telephone lines, not ISDN or IP digital lines. The “analogue” and “digital” refer to the processing used in the units.

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