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Author Topic: ZyXel VMG8324-B10A Preliminary findings.  (Read 116474 times)

kitz

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #195 on: February 02, 2015, 01:04:23 PM »

Cheers chrys.  If you add a link in the relevant thread then I'll update the first post when I get back later. :)
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les-70

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #196 on: February 02, 2015, 02:07:03 PM »

  @roseway

  I would have posted before but I did not like to be a broken record on the topic of high ES rates with Xyxel VMG8324-B10A when used on lines with odd random noise events.  My own experience seems consistent with other experiences in that on my line the Xyxel was just a bit worse than an HG612 for errors most of the day but for the odd times of day when my line had random noise it performed badly with up to 3 times the error rate (ES) of the HG612 and perhaps 10 times the size of max CRC spike in a typical day.  Kitz for example seems to have quiet line on which CRC spikes are rare and she clearly gets good results.  Chrysalis has I think a better line than me but worse than Kitz's. He also found higher ES with the Zyxel but not as bad as me.

 Yours is the only other clear cut test of a Zyxel and from MDWS it looks like it may/will take you interleaved if you leave it connected!  That said your line has been noisy in the last week and as always you can't rule out a very bad day. 

   By comparison I found the Billion 8800NL acceptable but still about 50% worse for ES than an HG612 and for me all the 63168 modems don't do so well.  My ordering of performance starting with the lowest errors is HG612 - 8800NL - TT HG635 -Zyxel VMG8324-B10A.  My ordering is not based on odd bad days but about about 14 days of use of each modem in in/out tests with HG612 one day and the test case the next. It however a test for just my line.

 Later comment:  It is very hard to judge but once a big error rate occurred with the Zyxel  my impression was that it was slow to get back to normal and kept giving higher errors at times of day when I am sure the noise should have reduced.  It did however seem to recover after a few hours.

« Last Edit: February 02, 2015, 02:49:33 PM by les-70 »
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Chrysalis

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #197 on: February 02, 2015, 02:16:12 PM »

yeah, wow what has happened to roseway's line, since 30 jan large increase in ES.  Close call on the 30th, but today he is over 3k.  So DLM tommorow?

Wonder if will be a retransmission profile.
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roseway

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #198 on: February 02, 2015, 02:47:44 PM »

There has been a general increase in my downstream ES values in recent days. I only installed the Zyxel yesterday, so I can't yet determine whether it's worse than the Billion or not on my line. It could just be that interference has increased - it's certainly the case that crosstalk has noticeably increased recently.
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les-70

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #199 on: February 02, 2015, 03:09:56 PM »

   Given the current high error rate - which may or may not in part be due to the Zyxel - I doubt that you will achieve a comparison.   Most probable is a DLM intervention. While I have a view on the Zyxel performance on fast path I have no idea which modem is better if interleaving hits.

   The current error rate is however looking like a significant increase of the worst errors seen in the last few weeks.
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roseway

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #200 on: February 02, 2015, 03:49:49 PM »

With so many variables it's not possible to get a clearcut comparison, but it was my definite impression when I used the HG612 for a few days that its performance on my line was worse than the Billion (lower DS attainable rate, more errors) and putting the Billion back reversed this deterioration. After using the Zyxel for a while I'll be trying more recent firmware and then later I'll put the Billion back.

If DLM intervenes it won't be a big issue for me - I'm not a gamer, and a small reduction in speed won't have any noticeable effect on my life.
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Chrysalis

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #201 on: February 02, 2015, 04:10:40 PM »

yeah sadly something changed on your line since the 30th, and as you said the zyxel wasnt put in place then.  Today is towering over the previous 3 days tho, I think you will get over 5k ES.
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les-70

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #202 on: February 02, 2015, 04:21:18 PM »

   Lets hope you see a G-inp rather than an interleave, or better the noise is affecting most lines and you get let off.  I also don't care much about any exact speed but even though I thought I would not notice interleaving I did notice it.  Web pages never load quite as sharply when it it is place.
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Chrysalis

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #203 on: February 02, 2015, 05:02:26 PM »

yeah interleaving for me is noticeable, as it affects anything latency sensitive, web browsing is one of those things.

Hopefully it will be g.inp.
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roseway

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #204 on: February 03, 2015, 07:36:06 AM »

No DLM intervention so far...

At 16:00 yesterday the ES rate plummeted, and the eventual total for the day was just below 4000.
« Last Edit: February 03, 2015, 07:39:37 AM by roseway »
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  Eric

les-70

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #205 on: February 03, 2015, 08:57:12 AM »

  I just looked and it seems you were a bit premature in your report today.  I must say the DLM interventions in the day rather than in the  early hours seems a daft idea and might interfere with an online transaction.
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Chrysalis

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #206 on: February 03, 2015, 09:33:29 AM »

so for the experts is g.inp on or off?
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roseway

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #207 on: February 03, 2015, 10:30:16 AM »

New stats:

Code: [Select]
Stats recorded 03 Feb 2015 10:23:34

DSLAM/MSAN type:        BDCM:0xa41b / v0xa41b
Modem/router firmware:  AnnexA version - A2pv6F039i.d24e
DSL mode:                VDSL2 Profile 17a
Status:                  Showtime
Uptime:                  1 hours 35 min 33 sec
Resyncs:                0 (since 01 Feb 2015 10:20:32)

Downstream Upstream
Line attenuation (dB):  0.0 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 72179 19999
SNR margin (dB):        6.3 15.0
Power (dBm):            13.5 1.2
Interleave depth:        1413 1
INP:                    3.00 0

RSCorr/RS (%):          0.0044 0.0031
RSUnCorr/RS (%):        0.0000 0.0000
ES/hour:                166 2.34

I don't think it's G.INP.
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  Eric

les-70

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #208 on: February 03, 2015, 11:10:50 AM »

  The Xyxel looks to be doing a good job on interleave with no ES so far.  Ronski went to fast path with a Xyxel so you may drop back to fast path sometime. 

 As you said the modem performance on fast path is impossible to evaluate from your experience so far. I do however remain suspicious that the Zyxel may have helped raise the ES when on fast path. 
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roseway

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Re: ZyXel VMG8324-B10A Preliminary findings.
« Reply #209 on: February 03, 2015, 11:28:06 AM »

I did notice that the bitswapping was far lower with the Zyxel, and now it's almost at zero, so maybe that's a factor.
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  Eric
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