Since the late 1980s the Integrated Services Digital Network has provided broadcasters with a convenient and cost-effective means of sending 7.5kHz or 15kHz bandwidth audio between two remote locations, without the need for advance booking of landlines or satellite links. Recent advances in audio compression techniques have now improved audio quality to the point where it has become useful to the recording industry, but a lack of understanding of telecommunications technology, and how to interface with it, has deterred many studios from adopting ISDN. This paper examines various problems that can be encountered by studios when using the ISDN and its related equipment.
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