Being on FTTC, and stable, the trials & tribulations of the "Plusnet copy of BT's IP Profile" systems hasn't affected me. But I can't help think there is something better!
I did see, a while back, that AAISP had chosen to do something different.
Take a look at this AAISP report
, indicating that they stopped paying attention to the whole system of BT reporting updates dynamically.
Instead, they just use the profile value that applies when you connect (I assume this is given to them as part of the PPP establishment phase).
- When the profile goes up, you do not gain speed automatically. You will have to disconnect & reconnect the PPP session (or, if you can't, just reboot the modem/router)
- When the profile goes down, the core ISP network will be sending too much data, which might be discarded by BT. This can affect things - worst case being that the discarded data counts as part of your allowance.
- You get the opportunity to get the new speed just by a new connection/reboot.
NB: The 2nd 'con' might not turn out to be the case in real life. As the BT profile drops as soon as you sync, and (in ADSL anyway), the modem/router will re-connect PPP after the resync. There's a good chance that the new speed will be sent as part of the new PPP session request.
The 1st 'con' would be the same - if BT just updated the profile values upwards with the same speediness.