In reply to a post by Michael_Chare:

What upload and download speeds would one get with a similar line if one had an 80/20 product?

The line is synced at 55477 which means it must already be on 80/20

It's impossible to sync above 55000 on any other package.

Edited by j0hn83 (Tue 30-Jun-20 15:43:22)

Thanks, at the moment I have a 40/10 product. My router shows an attainable rate of 49Mbps, so I don't think it worth paying for an 80/20 product, but sometimes Vodafone for example will let you have an 80/20 product for the same price. I just wondered if there are any disadvantages of accepting the offer.

In reply to a post by MHC:

In reply to a post by MrSaffron:

10 training period is a myth on VDSL2

Agreed, that is to get a standard 6dB SNR/margin. However there is an ongoing training period that allows the drop to 5dB, 4dB and finally 3dB.

That's not an ongoing training period though.
That continues for the duration the line is active.

On FTTC the DLM is in effect from day 1.
While it can optimise the connection and lower the SNRM this can happen on day 10 or day 1,000.

The 10 day training period is specific to the ADSL DLM.
For whatever reason ISP's trot the same 10 day training period nonsense on FTTC.
It's a convenient excuse to brush off the customer for 10 days.

The same 10 day training period nonsense was given when FTTC launched back when every line started off on fastpath from day 0.
They continued to quote the 10 day training period for years before lower SNRM dB's were even a thing so it's stretching it a little to suggest that's the reason for a training period being mentioned.

Those on ECI cabinets with no lower dB SNRM's still get quoted the 10 day training period.

It simply doesn't exist on FTTC. It is a myth.

Edited by j0hn83 (Tue 30-Jun-20 19:12:05)

OK training may not be the best word to use as it will be confused with the original 10 day training, but there is the ONGOING learning/monitoring/optimistic. It is a word that has been used for years where modems will train to the best data rate and continually retrain to optimise. Suppliers and designers I work with on modems way more complex than those used for FTTC will frequently refer to "training" as modems adapt to the changing conditions and potential data rates.

Every time a modem connects it is training.