It's been BT's business model for as long as I've been involved in telecoms. ISDN ? Yes we've heard of it ! You actually want it ? Oh go on then, but just wait until we've figured out how to cripple it enough that you can't do away with our vastly overpriced leased lines. Yes, we paid around 6k/year for a 64k leased line between two sites. Most of the time we could have made do with ISDN D channel signalling and bring up a B channel as required (I gather it was commonplace in Germany and other forward thinking places). No, not available from BT - they daren't have let that one out of the bag as it would have trashed their leased line business.
More recently, one of our customers at work has internet via a wireless service - put in as one of the earlier "get businesses connected" schemes where he pays for a "2M ADSL" but gets this business grade wireless. As it happens, he was the only customer on the particular segment at the base tower - and got near enough 4M symmetric for a few years. Last time I was there, he commented that it wasn't as fast, and yes, the ISP has now hard throttled him down to 2M.
It's still better than the alternatives, but only just.
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