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Author Topic: Plusnet - Speed lower than Openreach DSL Checker Estimate.  (Read 939 times)

ejs

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #30 on: February 06, 2019, 08:16:30 PM »

A notable difference between the stats from the HG612 and the Zyxel was the the HG612 had R=14 on the downstream, whereas the Zyxel had R=0. So the HG612 put some FEC bytes on the downstream, with zero INP and no interleaving. Both modems have some FEC on the upstream (which may be the DSLAM's decision). I think we've seen before that some modems (Lantiq) tended to apply some FEC when on zero INP, while others didn't. And the HG612 gave slightly more bandwidth despite the FEC data taking up some bandwidth ;).

What modem works best on one line may not be the same as what works best on other lines, obviously just use whatever works best on yours.
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j0hn

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #31 on: February 06, 2019, 08:24:07 PM »

Might be jumping the gun here, but was just on roadworksdotorg and found the following updated today -

MJ Quinns are to install a new DSLAM cabinet and 25m of ducting to be laid in footway and grass verge.  Planned 11th to 22nd Feb.

Location right where my existing cab is.

Now oddly I did notice one of their vans and engineers working last night at the location as I drove home around 6.30, coincidence I wonder?

The exact same happened to me.
I was on an ECI cabinet and they installed a Huawei.
I jumped through a couple hoops and got on the Huawei cabinet.

With my line I would have around:
ECI: 31Mb downstream (interleaved)
I get now
Huawei: 45Mb downstream with G.INP @ 3dB SNRM

Both cabinets synced roughly the same on the downstream but DLM changes give me 14Mb extra on the Huawei cabinet.
At the time of my switch
ECI: 55Mb downstream (fastpath)
Huawei: 54Mb downstream (fastpath)

The Huawei cabinet synced way higher than the ECI on the upstream.
At the time i switched cabinets
ECI: 6.8Mb upstream
Huawei: 11Mb upstream

Crosstalk has reduced my downstream to 45Mb and upstream to 7.2Mb
« Last Edit: February 06, 2019, 08:30:21 PM by j0hn »
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Plusnet FTTC 80/20 -  ECI now Huawei cab
retx low @ 3dB target SNRM
Zyxel VMG1312-B10A bridged with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

vultura

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #32 on: February 11, 2019, 07:27:43 PM »

15 days now since the Zyxel was installed and holding steady.

Looking at the connection speed graphs (with max attainable ticked) the max attainable never goes higher than the current speed.  Is that a firmware bug?


A further musing on my part, the install is old (1950's estate) and the overhead cable (up to the eaves) has been replaced in the last decade, but the line-in cable wasn't.  It was joined under the eaves, where I am sure no joint prior to the overhead being replaced.  Could that be hindering performance?
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burakkucat

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #33 on: February 11, 2019, 09:41:03 PM »

. . . the install is old (1950's estate) and the overhead cable (up to the eaves) has been replaced in the last decade, but the line-in cable wasn't.  It was joined under the eaves, where I am sure no joint prior to the overhead being replaced.  Could that be hindering performance?

That will be very unlikely.
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vultura

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #34 on: February 12, 2019, 12:07:33 AM »

That will be very unlikely.

Thanks for reply.
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vultura

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #35 on: February 18, 2019, 08:09:43 PM »

Well the new cabinet is now on-site and it sure looks like a Huawei one.

Not sure if it means anything, but it looks like there is new tarmac running from it to the old ECI cabinet as well as to the PCP a short distance away.

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j0hn

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #36 on: February 18, 2019, 08:26:26 PM »

They only install Huawei cabinets now.
Single door and larger double door versions with different capacity in each.

The tarmac to the PCP is for the tie cables.
The path to the ECI will be for the power supply and fibre.
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Plusnet FTTC 80/20 -  ECI now Huawei cab
retx low @ 3dB target SNRM
Zyxel VMG1312-B10A bridged with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

vultura

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Re: Plusnet - Speed lower than Openreach DSL Checker Estimate.
« Reply #37 on: February 18, 2019, 10:09:55 PM »

They only install Huawei cabinets now.
Single door and larger double door versions with different capacity in each.

The tarmac to the PCP is for the tie cables.
The path to the ECI will be for the power supply and fibre.

Thanks for explaining that j0hn.

It is a single door unit that has been installed.
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