Sonifex Telephone Hybrids Description

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Sonifex Telephone Hybrids

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.

Digital or Analogue?

Sonifex offers two different hybrid units - the HY-03 analogue TBU and the DHY-03 DSP-based TBU.

Note that both of these products are operating on analogue telephone lines, not ISDN digital lines. The "analogue" and "digital" refer to the processing used in the units.

Related Links:
> HY-03 Analogue Telephone Hybrid in more detail...
> Sonifex Online Store
> HY-03 & DHY-03 Frequently Asked Questions
> HY-03 Handbook
> TBU Brochure (PDF)

HY-03 Analogue TBU

The analogue HY-03 hybrid is suitable for most general telephony applications and is often used in radio and TV stations, dealing floors and bingo halls. 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 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.

Related Links:
> DHY-03 Digital Telephone Hybrid in more detail...
> Sonifex Online Store
> HY-03 & DHY-03 Frequently Asked Questions
> DHY-03 Handbook
> TBU Brochure (PDF)

DHY-03 Digital TBU

A complete redesign of the old DHY-02 telephone hybrid, the DHY-03 offers possibly the best performance from an analogue telephone line using a hybrid, with 72dB typical line balance rejection.
The DHY-03's feature-set includes universal line compatibility, input and output gain adjustment, input and output metering, conferencing, RS232 serial control, local/remote line hold switching, integrated auto-answer, automatic call disconnection, auto-ducking, DTMF tone recognition, a balanced mic/line input and balanced line output.
The DHY-03 digital hybrids are available in three models :

DHY-03 Single free-standing automatic digital TBU.
DHY-03S Single 19" rack mounted automatic digital TBU.
DHY-03T Twin 19" rack mounted automatic digital TBU.

Part/Model Description/Webpage Catalogue (PDF) Handbook (PDF) Press Images (JPG)

Analogue Telephone Hybrids

HY-03 Single free-standing automatic analogue TBU Catalogue Handbook [front] [rear]

HY-03S Single 19" rack mounted automatic analogue TBU Catalogue Handbook [iso] [front] [rear]

HY-03T Twin 19" rack mounted automatic analogue TBU Catalogue Handbook [front] [rear]

Digital Telephone Hybrids

DHY-03 Single free-standing automatic digital TBU Catalogue Handbook [front] [rear]

DHY-03S Single 19" rack mounted automatic digital TBU Catalogue Handbook [iso] [front] [rear]

DHY-03T Twin 19" rack mounted automatic digital TBU Catalogue Handbook [front] [rear]

DHY-03EC Automatic digital TBU with ringing detector. Eurocard model (PCB 10x16cm) Catalogue Handbook [iso]

Sonifex Ltd. 61 Station Road, Irthlingborough, Northants, NN9 5QE, UK.
Tel: +44 (0)1933 650700 Fax: +44 (0)1933 650726 EMail: sales@sonifex.co.uk