A field trial for integrated broad-band services offering cable TV, telephone, and data (Telidon) over a star-type fiber optic network was cut over to operational status in October 1981. Two switching centers interconnected with a fiber optic trunkline serve 150 subscribers who are connected to the centers through fiber optic lines. To date, no failures in the optical and optoelectronic components have occurred. The flexibility of the centrally switched configuration allows future expansion towards provision of demand-access video services based on the videodisc. Still-picture service using frame grabbers at the subscriber's home can also be considered. Eventually, high definition television (HDTV) might also be offered.
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Chang et al. (1983) studied this question.
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