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Originally Posted by ianathuth
Loads will vary from day to day and hour to hour. They can't use it to move them onto another number if there is a heavy load because the number is dialled and connected before it gets the chance to alter the number.
If it is for load balancing I would have thought that it would be easier and more efficient to intercept the call on its way into the NTL system and route it to whatever location they wanted.
It would be interesting to hear the technical reasons why they have chosen to take this route and taken away the freedom of users to choose an operating system. After all it is called NTL: Freedom.
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I may be totaly wrong about this, it's only a guess.I suspect that the interception of the calls and autodirection to approraite number is much more complcated for NTL offnet customers (who appear to be the only ones affected). Almost certainly it would be possible for calls originated from other suppliers, but I suspect that this would involve some cost from these suppliers. It possible that this is an attempt by NTL to achieve some of the same benefits and bypass these costs. Though I may well be barking up the wrong tree here.
I understand your point about usage changing by the hour and day but it would also change and average by the week and month as well. It's less fine but still offers some benfit I would suspect.
At the end of the day I am trying to 'rationalise' why NTL would want to be able to change a users dialup number at will.