Kitz Forum

Broadband Related => FTTC and FTTP Issues => Topic started by: milgo on January 12, 2018, 03:53:33 PM

Title: Drop in attainable D/S on switching provider! Is this correct?
Post by: milgo on January 12, 2018, 03:53:33 PM
I have a question for the learned amongst you.  Yesterday I moved from Sky 80/20 to BT 54/10 Now everything is as I expected except for the fact  that my attainable downstream speed has dropped from 82 to 67.  I would have thought that whatever profile I am on the attainable down and up would have remained constant...or have I got this wrong?

Thanks
Title: Re: Drop in attainable D/S on switching provider! Is this correct?
Post by: gazaai on January 12, 2018, 04:07:21 PM
If your an ECI Cabinet before you may have had interleaving enabled which gives a high attainable value.
Or if you are on a Huawei cabinet, since the line got changed yesterday you wont have G.INP enabled yet and the attainable will be much lower.

That would be my reasoning behind it anyway...
Title: Re: Drop in attainable D/S on switching provider! Is this correct?
Post by: j0hn on January 12, 2018, 04:18:13 PM
As above, perfectly normal.
Pretty much only those on fastpath/ECI retain the same DLM profile after an ISP switch.
Everyone else will see their sync and/or max attainable change considerably during an ISP switch.

I'm synced at roughly 50Mb. If I switched ISP tomorrow I would drop to roughly 35-36Mb.
That's the difference between "interleaving, 6dB snrm target" and "retransmission, 3dB snrm target.
Title: Re: Drop in attainable D/S on switching provider! Is this correct?
Post by: milgo on January 12, 2018, 05:15:21 PM
I see.  Yes I'm on a Huawei cabinet and I have a HG612 connected between the router and NTE and did notice that both G.INP and Interleaving were no longer active.  Thanks.