Originally posted by Dow Jones
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A telco will have several thousand exchanges, all geographically separate from each other, that need to be updated with a new release before they can 'sell' the new features that it introduces to paying customers.
Even if they could get the staff to do the task across these geographically spread locations all at the same time, they don't want to take the risk of a problem bringing down more than a couple of exchanges so they update a few at a time over a period of months. Working like this also costs big bucks.
Unsurprisingly, they don't want to do this roll out more frequently that once every 12-18 months and as it costs a lot of money each release has to have a substantial number of new features or they won't bother at all. So, as a manufacturer of telco equipment you have no choice but to provide software updates at this frequency, containing significant improvements in a big bang. Trickling out minor updates at weekly intervals, just doesn't work.
tim
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