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Standard User blueacid
(committed) Sun 19-Aug-12 18:07:29
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Hang on, where did that 2mbit go?


[link to this post]
 
So my router and DECT phone base are plugged directly into the master, with no extensions connected.

I previously got around 10mbit, however now it's closer to 8mbit, with a slightly low looking SNR.

Screenshot from DMT Tool: http://imageshack.us/photo/my-images/214/dmt20120819...

Line Stats:
Uptime: 0 days, 0:47:25
DSL Type: G.992.5 annex A
Maximum Bandwidth (Up/Down) [kbps/kbps]: 1,339 / 11,919
Bandwidth (Up/Down) [kbps/kbps]: 1,325 / 8,188
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 19.0
Line Attenuation (Up/Down) [dB]: 23.0 / 38.0
SN Margin (Up/Down) [dB]: 4.5 / 4.5
Vendor ID (Local/Remote): TMMB / BDCM
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 0 / 112,189
CRC Errors (Up/Down): 0 / 1
HEC Errors (Up/Down): 1,077 / 0

Before posting this I disconnected everything & reconnected it all to ensure that there were no loose connections. Before this the line had been up for 30 days with similar stats.

Looking at the DMT Tool, the first two gaps are accounted for by local MW radio stations (Magic 1152 and 1458 Gold Manchester). Not sure what causes the others!

Quiet line test still sounds quiet, so I'm at a loss as to how to get the speed back up a bit.. Is this just the way things go, or have I missed something painfully obvious somewhere?
Standard User ukhardy07
(experienced) Sun 19-Aug-12 18:27:02
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Re: Hang on, where did that 2mbit go?


[re: blueacid] [link to this post]
 
Who is the ISP.

When you sync initially is the SNR 6db or 3db. Perhaps this got increased.

Also have you tried syncing at 10:30am-ish, that's the best time to sync usually.
Standard User blueacid
(committed) Sun 19-Aug-12 18:44:24
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Re: Hang on, where did that 2mbit go?


[re: ukhardy07] [link to this post]
 
ISP is Bethere, I'm on Be* value so there should (should!) be a sync limit of 12mbit. The previous limit was 8mbit so there's always the option that they've made a mistake reconfiguring the dslam.

The target SNR should be around 6db I'd think. I'll try to get a 10am-ish sync and see how things go.


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Standard User RobertoS
(sensei) Sun 19-Aug-12 18:55:33
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Re: Hang on, where did that 2mbit go?


[re: ukhardy07] [link to this post]
 
Looks like an 8Mbps cap to me.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre FTTC 80/20 trial.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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Edited by RobertoS (Sun 19-Aug-12 18:56:13)

Standard User Zarjaz
(knowledge is power) Sun 19-Aug-12 20:43:38
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Re: Hang on, where did that 2mbit go?


[re: blueacid] [link to this post]
 
Lots of HEC errors in a shortish up time.

Standard User blueacid
(committed) Sun 19-Aug-12 21:14:37
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Re: Hang on, where did that 2mbit go?


[re: Zarjaz] [link to this post]
 
In reply to a post by RobertoS:
Looks like an 8Mbps cap to me.


I do wonder whether that's the case, might be worth phoning them.. will do that tomorrow so long as I remember laugh

In reply to a post by Zarjaz:
Lots of HEC errors in a shortish up time.


Any suggestions as to what I should do to resolve this?

Edited by blueacid (Sun 19-Aug-12 21:14:59)

Standard User blueacid
(committed) Wed 22-Aug-12 18:31:42
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Re: Hang on, where did that 2mbit go?


[re: RobertoS] [link to this post]
 
The muppetry was strong with this one.

Called be*, who confirmed I was on the lowest target-SNR profile possible, but they confirmed I had no sync limit... but then suggested switching to no faceplate and a new filter/rj11 lead...

Uptime: 0 days, 0:06:05

DSL Type: G.992.5 annex A

Maximum Bandwidth (Up/Down) [kbps/kbps]: 1,334 / 14,480

Bandwidth (Up/Down) [kbps/kbps]: 1,330 / 11,582

Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00

Output Power (Up/Down) [dBm]: 12.0 / 19.0

Line Attenuation (Up/Down) [dB]: 23.0 / 38.0

SN Margin (Up/Down) [dB]: 4.0 / 3.0

Vendor ID (Local/Remote): TMMB / BDCM

Loss of Framing (Local/Remote): 22 / 0

Loss of Signal (Local/Remote): 2 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): 0

Error Seconds (Local/Remote): 17 / 0

FEC Errors (Up/Down): 0 / 104,494

CRC Errors (Up/Down): 0 / 622

HEC Errors (Up/Down): 8 / 518


Somewhere, there's a fault in one of those three devices, but since it's going well now I'll leave it. The aesthetics of it being the test socket really doesn't fuss me; it's in the garage so I really couldn't care less!

So, yes, the obvious thing that I was missing was to replace everything tongue
Standard User Zarjaz
(knowledge is power) Wed 22-Aug-12 19:04:54
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Re: Hang on, where did that 2mbit go?


[re: blueacid] [link to this post]
 
No noise on the line ? Possibly an RFI source nearby, that's still lots of errors. Worth trying a different router, often find, at this point, that someone will point out that the high errors are a feature of your flavour of router.

Standard User blueacid
(committed) Thu 23-Aug-12 00:16:01
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Re: Hang on, where did that 2mbit go?


[re: Zarjaz] [link to this post]
 
I'm in an apartment block so yeah, there's probably a plasma screen TV nearby or something similar; not really sure how I'd check for one.

My other router (DG834v2) connects around 1mbit slower than the BeBox (Speedtouch 585v7). Apparently these are prone to counting lots of nonexistent errors.
Standard User ukhardy07
(experienced) Thu 23-Aug-12 02:39:38
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Re: Hang on, where did that 2mbit go?


[re: blueacid] [link to this post]
 
In reply to a post by blueacid:


It's exaggerated at best how much plasma tvs affect these things. We have a few plasmas in our house, at one point the plasma was touching the router as the router was placed next to the screen. All was fine.

Devices which are malfunctioning down a phone line are much worse I find. Eg get 1 faulty Sky box & it can slowdown and cause issues for several houses in the area. It literally will pump junk down the phone lines and causes problems for everybody nearby.

I find if a line holds I don't worry too much. By hold I mean no drop out ever. Even 1 drop out a month and I'm up in arms personally (if I notice it). There's people who think a drop out a day is fine. Even ISPs suggest that's fine. Excuse me but a line shouldn't be dropping full stop. I had a few rows with eclipse internet a long while back as they thought numerous drops a day was fine.

That said I'm the kind of guy who'll happily lose a few Mbps for the sake of perfect stability. I don't 'push' a line with custom SNR or anything. Some people force to SNR as low as 1 / 2 db. Crazy in my opinion.

Hope things are kind of sorted anyway smile SNR is back to 3db from the looks of it. Given that it was 6db before as you thought. That'll give a little more speed.

Edited by ukhardy07 (Thu 23-Aug-12 02:46:42)

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