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Charging Policies

There is probably no more volatile marketplace at present than that for telecommunications services -- in many sectors (eg mobile communications), competition has resulted in large price reductions. This has, in general, not been observed in the "fixed service" market, where established telco monopolies such as Telstra in Australia are able to maintain comparatively high prices.
 
In general, PSTN and ISDN services are charged in a similar way:
 

 
The tutorial for this lecture is Tutorial #13.
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