I had FTTC installed in Feb 2015, basically the moment it became available to me - it was estimated (and I knew this to be hopelessly optimistic) that I'd get 50-68M down... the day arrived and it actually managed 42.
Since then it has been basically entirely stable, although it slowly dropped to around 33-34 and after changing from the Openreach ECI modem (plus a LinkSys router) for a FritzBox (to get G.INP and to condense the installation into a single device) it rocketed up to be stable around 43-45M.
Over time, the maximum permitted rate by the remote end (started at 80000) has dropped in steps - 60000, 44000, 40000,35000, 32400.
Nothing has changed at my end - there is no CPE attached other than the router, there is no premises wiring (I had that disconnected before the VDSL install happened). It's entirely underground fed for the entire distance to the exchange.
I've had a dig around in the historical mails the FritzBox sends me about the connection and I notice the periodic drops in attainable rate (light blue line) and the actual sync (green line), you can see in the linked picture - http://imgur.com/7mJap4k - those drops started on March 15th and occur 0-2 times per day ever since.
Now I know I'll never get near 80M (I'm 250m from the cabinet but the line actually goes at least 900m to get to me) - but having been happily receiving 43-45 for the last 6 months, I'm now seemingly condemned to 32...
Any ideas what the likely cause is? I'm guessing it's a ham-fisted jumpering of a nearby line that's started it...
edit: The attainable rate is still constantly in the 43-45M range (apart from the drops in the picture - which typically last approximately 1 hour at no particular time of day)
Edited by hunnymonster (Tue 26-Apr-16 10:17:19)