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Author Topic: Drop in attainable D/S on switching provider! Is this correct?  (Read 166 times)

milgo

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Drop in attainable D/S on switching provider! Is this correct?
« 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
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gazaai

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Re: Drop in attainable D/S on switching provider! Is this correct?
« Reply #1 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...
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MDWS Username: GaZaai
Plusnet: 80 / 20
Technicolor DGA4130 (BCM63138) FW: 1.0.4, GUI: Latest
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j0hn

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Re: Drop in attainable D/S on switching provider! Is this correct?
« Reply #2 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.
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BT FTTC 55/10 ECI Huawei Cab - Zyxel VMG1312-B10A bridge mode + Asus RT-AC68U running Asuswrt-Merlin - minted on MDWS via DslStats

milgo

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Re: Drop in attainable D/S on switching provider! Is this correct?
« Reply #3 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cabinet and I have a HG612 connected between the router and NTE and did notice that both G.INP and Interleaving were no longer active.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.
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