Just seen this thread. It now explains some of the problems I was having on voip.co.uk - it was a number then routed out by Voxalot via voipcheap.
It would appear to me that it is due to the FUP, but I guess they have just started applying it more stringently to certain providers.
Oh well, looks like I'll just have to use my ATA to do call forward, which is a shame, because the quality is not always so good.
Would appreciate knowing the results of your investigations Martin, just in case we can find a better way around this issue.
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