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The big line card swap (removing the 70Mbit cap)
28-03-2013, 10:04 AM (This post was last modified: 02-04-2013 03:13 AM by alexatkin.)
Post: #1
The big line card swap (removing the 70Mbit cap)
Well, the big day came today - Digital Region swapped the line card in my cabinet so they could remove the 70Mbit cap on my line.

Here you can see my previous sync, the new sync after the swap and then the final speed after I called up Origin to get them to look into why it hadn't improved as much as it should have:
Code:
Mar 19 19:36:25 VDSL SYNC STATUS: Downstream 69993/129768, Upstream 29186/29504, Synced for 437827 seconds.
Mar 28 06:29:31 VDSL SYNC STATUS: Downstream 71679/118568, Upstream 30718/33244, Synced for 2 seconds.
Mar 28 11:56:52 VDSL SYNC STATUS: Downstream 100015/117319, Upstream 36305/36305, Synced for 3 seconds.

Here are links to detailed line stats for before, after. I'm not sure why the graphing isn't working properly any more.
[Image: 2013-03-28_05:59.png]
[Image: 2013-03-28_06:59.png]
[Image: 2013-03-28_11:59.png]

Here is the comparison graphs after a few days of the new service:
[Image: uncapped168sync_t.png][Image: uncapped168snr_t.png]

You can see they have tweaked the band plans too so I am getting a faster upload speed than before as well as faster download:
BEFORE:
Code:
US: (0,95) (872,1203) (1972,2779)
DS: (32,867) (1208,1971) (2784,4003)

AFTER:
Code:
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)

[Image: 2605868901.png]

It appears they still didn't push my line quite to the max (although its hard to know for sure, max attainable could be completely wrong), but it probably makes sense to see how it handles the current settings before trying for the absolute max. Its faster than BT Infinity2, so that's a good start.

Real world speed test downloading a 512MB test file from my VPS with 4 connections: 10.5MB/s
Downloaded 512.0 megabytes in 48 seconds. (10749.46 KB/s)

Real world speed test downloading a 512MB test file from my home broadband to my VPS (using wget via ssh) using a single connection: 4.01MB/s.

I consider these results a more accurate report of my speed than speedtest.net as they are real-world downloads/uploads from my own VPS with 100Mbit dedicated bandwidth, and none of my sites get many hits so its usually all free.

Also, if you click on my signature you can now view historical speed tests showing my connection from Be Broadband on ADSL2+ up to today. Its a pretty huge improvement considering its over the course of less than 2 years.

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28-03-2013, 02:07 PM
Post: #2
RE: The big line card swap (removing the 70Mbit cap)
"had a fiddle" lol
So you happy with it now?

Regards
Spencer Davies
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28-03-2013, 02:25 PM (This post was last modified: 02-04-2013 03:03 AM by alexatkin.)
Post: #3
RE: The big line card swap (removing the 70Mbit cap)
Yeah.

While my nature of "push it that bit more" makes me look at the SNR and think "oh, but why not push for 9dB or even 6dB", it would be asking a lot of Thales when that definitely could cause problems in the summer. Maybe they will do it 5 minutes before the new contractor comes in just to piss them off, lol.

At this point Origin seem to think I am still the only person on the cabinet so it makes sense to leave some safety margin, more people coming on Infinity over the course of the year could easily bring my stats down as well as the hotter weather.

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28-03-2013, 03:08 PM
Post: #4
RE: The big line card swap (removing the 70Mbit cap)
Generally I don't find hotter weather affects my stats too much, just general night time radiation as people use more power and rain storms are the usual culprits. On saying that though, I reckon your line can probably squeeze a little closer to 100Mb. I would see what your stats are tonight and see if it's worth a gamble.

ISP: plusnet Router: Huawei EchoLife HG612 Speed: ~53Mb/13Mb PCP: ~500m Exc: Intake
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29-03-2013, 02:11 AM (This post was last modified: 29-03-2013 02:38 AM by alexatkin.)
Post: #5
RE: The big line card swap (removing the 70Mbit cap)
I agree, if the upstream is anything to go by I should be able to sync at approximately what the maximum attainable rate is reporting, although for safety I think perhaps just another 10Mbit would be about right. But I do not want to push my luck and risk them doing something silly like putting interleaving on my line or just getting really pissed off with me.

I think I know why they are reluctant to do it anyway. Thales seem to set the upstream to dynamic based on a target SNR margin, but the downstream remains a fixed value. That seems a bit bizarre when coming from Be which used a target SNR margin for both, but I think I might know why they do this, its due to the lack of DLM.

On BT, downstream data is throttled all the way back at the RAS which I believe is in London. That prevents more traffic being sent along the expensive fibre links, wasting bandwidth, causing congestion, than what your line is actually capable of receiving. That can only be done by knowing your downstream sync rate which is partly what DLM is for. On Digital Region I'm guessing they do the same, but Thales have to set that throttle rate manually and so they also have to set your downstream rate accordingly. No point in it being dynamic as the actual data rate of your connection would remain the same.

Upstream on the other hand ALL traffic coming from the customers is important and is sent on a best effort basis. In fact on Digital Region I believe the idea is that the fibre bandwidth will always exceed the combined speed of everyone connected to it anyway.

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30-03-2013, 01:33 AM
Post: #6
RE: The big line card swap (removing the 70Mbit cap)
There is an interesting discussion I have gotten into on the HG612 hacking site about how much we can trust the reported statistics:
http://huaweihg612hacking.wordpress.com/...mment-4463

More importantly, it suggests that this new version of the backed HG612 firmware is able to obtain greater upstream speeds than the original one we are using. I haven't been brave enough to try it yet with my line only just been unlocked, I need to get a baseline for the new line card first.

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30-03-2013, 08:08 AM
Post: #7
RE: The big line card swap (removing the 70Mbit cap)
Oooh 60Mb upstream.. I likeee. Makes me firmly believe DRL should be offering symmetrical connections like 20/20 - 40/40 - 60/60 as packages to distinguish themselves from BT. I'm sure many business' out there would love higher upstream capacity.

ISP: plusnet Router: Huawei EchoLife HG612 Speed: ~53Mb/13Mb PCP: ~500m Exc: Intake
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30-03-2013, 02:16 PM (This post was last modified: 30-03-2013 02:18 PM by alexatkin.)
Post: #8
RE: The big line card swap (removing the 70Mbit cap)
Indeed, but perhaps there are regulatory reasons that prevent reallocating downstream frequencies into upstream? I really wouldn't be surprised if the specific band plans have to be okayed by Ofcom to guarantee minimal crosstalk with ADSL.

In this day and age of vlogging, its curious that people are still so ignorant of the difference between downstream and upstream speeds. Then again, its not like ISPs promote anything but the "up to" downstream speeds in their advertising.

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31-03-2013, 03:02 PM
Post: #9
RE: The big line card swap (removing the 70Mbit cap)
Indeed, I'm very disappointed with the major ISP's. They often don't even list the upstream speeds as if it's not important. I've seen this being done in other countries too. Of course downstream is generally more important than upstream capacity to the majority of people, but for business and individuals who are creators and those who use the internet to back up their data remotely, they need better affordable options.

ISP: plusnet Router: Huawei EchoLife HG612 Speed: ~53Mb/13Mb PCP: ~500m Exc: Intake
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02-04-2013, 11:02 PM (This post was last modified: 02-04-2013 11:12 PM by alexatkin.)
Post: #10
RE: The big line card swap (removing the 70Mbit cap)
I bit the bullet, I asked Origin to check if they can push my downstream that LITTLE bit higher as I am curious to see if I can max out the HG612s 100Mbit ethernet port.

If they say no, its not a big deal, but I HAD to ask. SOMEONE needs to be testing what these new line cards can do, right? Tongue

It seems to have become a challenge to try and see if I can bully Thales into pushing my line onto a 6dB SNRM profile. Wink

I think the people who helped unlock the HG612 are also curious to see what its capable of, so yeah I am doing this for the community. Its nothing to do with wanting to show off to people with Infinity2, honest! Angel

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