All ISPs using BT Wholesale's rebadged IP stream product (such as Sky Connect) have their "own Centrals" which are leased from BTw and therefore they can control and route their users traffic out on to the internet in a way which they deem the most efficient.

This includes traffic shaping, as declared in Sky's T&Cs for Connect.

Actually Zen have small print about speeds could be 2mb at peak but could be as low as 160kbps:

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It is likely that speeds no greater than 2Mbps will be achieved at peak usage times.
Speeds are affected by line length, quality and peak Internet usage periods and will range from 160Kbps to 7150Kbps

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Again, Sky don't regulate any traffic on Connect, which is BT's network; only BT can do that. Neither can any other ISP that retails BT's product, so perhaps they feel no need to put it in their T&C.

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I think you're not quite clear on how BTw products actually work.
An ISP will lease transit capacity, generally from BT.
On IPstream products, this is normally in the form of 'centrals'.
Each central has a capacity of 622Mbps, but they can be split into four 155Mbps segments, for the smaller ISPs (or for those who don't quite have enough users for an entire extra central).
An ISP will lease as many centrals as it feels necessary for its needs (for example, Entanet lease 6 x 622Mbps centrals, plus they have some WBC transit as well, giving them over 3.7Gbps instantaneous capacity to be shared by all users).
The amount of transit capacity, available to an ISP, is a nationwide thing, so it's quite possible for BT to run out of backhaul [from an individual exchange] well before an ISP runs out of capacity on its centrals. This is often a higher risk on smaller village exchanges.

Yes, BT will requlate traffic to prevent a central from going over 622Mbps, but they don't do it per user.
So, well before the BT limits cut in, an ISP is required to manage the traffic on its own centrals.
Most do this by having very low usage allowances (30GB a month, or less), so people cannot hammer their connections 24/7.
Others do this by traffic shaping (reducing the speeds of individual protocols and ports - e.g. ftp, p2p, usenet, etc. are throttled by more than http & VOIP).
Some more do the traffic management by regulating the entire download speed for each user (Entanet do this - as a central becomes overloaded; Entanet not BT lower the data throughput for each user, on the affected central, until the central is not overloaded).
In all cases, it's the ISP which has control over traffic shaping, overall throttling, etc., not BT.
BT do not have the capability to traffic shape or throttle individual customers.
The ISPs keep control over the traffic shaping and throttling (or lack of it - because on the expensive, or low usage ISPs, they simply don't have the high volume users), BT do not do it for them.




Ade

ADSL2+ with BE
DL Sync Blimey....4707kbps now!
UL Sync 1088kbps

Thank you. I stand corrected.