The shift from a narrow-band world to a broadband world implies more than just a shift to a new technology, it involves the decline of business models associated with narrow-band economics and markets, but an uncertainty associated with future markets, costs and revenues. In previous cycles of investment associated with ‘new’ telecommunications technologies, for example the shift from analogue to digital, the use of communications satellites, and the shift to mobile cellular technologies, future markets were fairly well forecast, although in some cases under-forecast.
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