Here are the periods when the attainable rate has dropped in a step (of about 4M), rising back to where it was...

Max allowable rate 60000 / actual sync at that point 44300
Tu March 15 - 1900-2000

Max allowable rate 44000 (dropped on March 16 around 0600)

Max allowable rate 40000 (dropped on March 22 around 1200 - great time to do it)
Tu March 22 - 1800-1900
We March 23 - 1700-1800 & 2300-0000
Tu March 29 - 1900-2000
We March 30 - 1900-2000

Max allowable rate 35000 (dropped on April 01 around 1200 - again great time to do it)
Su April 03 - 1700-1800
Mo April 04 - 1700-1800
Tu April 05 - 1800-1900
We April 06 - 1300-1400 & 1700-1800
Su April 10 - 0700-0900 & 1700-1900
Mo April 11 - 1900-2000
Tu April 12 - 0000-0100 & 1200-1300
We April 13 - 1700-1800
Th April 14 - 1600-1700 & 1800-1900
Su April 17 - 1500-1700 & 1800-1900
Mo April 18 - 1700-1800
Tu April 19 - 1700-1800 & 2200-2300
We April 20 - 1400-1500 & 2200-2300
Th April 21 - 1900-2000

Max allowable rate 32400 (dropped this morning at 0650)

No observed attainable rate drops since 2000 on April 21...

Edited by hunnymonster (Tue 26-Apr-16 12:55:47)

Does your line still show a max attainable of 60000 ?

How are you reading your lines speeds?

Max attainable is showing as (right now) 44453 - which is hovering around where it has since I acquired the FritzBox

Line speeds from the interface of the router (and they match up with the data my ISP has in his control panel - which is populated from the MSAN/DSLAM at line sync time)

Are those EXACT times when it changes or rounded? Or have you set up monitoring to check on the hour?
A pity you cannot run DSLstats.or Routerstats to generate some graphs.


Do you have an alternate modem that you could install for a day or two and produce some graphs of what is happening?

Those are time frames only - better data not available, certainly not historically

As for alternate router/modem - sadly nothing that can be inserted easily (allowing for suppression of spousal eye rolling)

Are you connected to the test socket or an extension?

Direct into the master socket (which has the VDSL service specific "lump" on it)

There is definitively no premises wiring - I removed that before the VDSL was even available to order here.

Could be a line fault. Is the phone line noisy?

Don't know - no longer have an instrument to test Fed up with getting cold calls so it got disconnected and the instrument binned.

I may have to borrow one from a neighbour to test...

Or five quid at argos http://www.argos.co.uk/static/Product/partNumber/552...