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179 posts

Master Geek
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Topic # 129079 3-Sep-2013 11:11
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Hi,

I am on telecom ADSL2+, and I am getting low speeds for my Attenuation:



Mode: ADSL_2plus
Traffic Type: ATM
Status: Up
Link Power State: L0

Downstream Upstream
Line Coding(Trellis): On On
SNR Margin (0.1 dB): 121 126
Attenuation (0.1 dB): 160 36
Output Power (0.1 dBm): 0 128
Attainable Rate (Kbps): 10052 1144

Path 0 Path 1
Downstream Upstream Downstream Upstream
Rate (Kbps): 8316 1081 0 0

MSGc (# of bytes in overhead channel message): 51 10 0 0
B (# of bytes in Mux Data Frame): 148 16 0 0
M (# of Mux Data Frames in FEC Data Frame): 1 8 0 0
T (Mux Data Frames over sync bytes): 2 10 0 0
R (# of check bytes in FEC Data Frame): 12 4 0 0
S (ratio of FEC over PMD Data Frame length): 0.5714 4.0 0.0 0.0
L (# of bits in PMD Data Frame): 2254 280 0 0
D (interleaver depth): 96 1 0 0
Delay (msec): 13.71 1.0 0.0 0.0
INP (DMT symbol): 2.4 0.5 0.0 0.0

Super Frames: 49454 40268 0 0
Super Frame Errors: 0 0 0 0
RS Words: 5637766 805370 0 0
RS Correctable Errors: 0 0 0 0
RS Uncorrectable Errors: 0 0 0 0

HEC Errors: 0 0 0 0
OCD Errors: 0 0 0 0
LCD Errors: 0 0 0 0
Total Cells: 15803696 0 0 0
Data Cells: 743349 0 0 0
Bit Errors: 0 0 0 0

Total ES: 23 1
Total SES: 23 0
Total UAS: 33 33

I was looking at the graph on this post: http://www.geekzone.co.nz/forums.asp?forumid=49&topicid=27834 and it looks like I should be getting 20 Mbits down? Any suggestions?

Thanks

Edit: More info:

- Your ISP and plan

Telecom 150GB + Phone line

- Type of connection (ADSL, ADSL2, VDSL)

ADSL2

- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)

Provided.

- Your general location (or street)

Mairehau, Christchurch

- If you are rural or urban

Urban

- If you know your connection is to an exchange, cabinet or conklin

Not sure.

- If your connection is to a ULL or wholesale service

Not sure.

- If you have done an isolation test as per the link above.

Yes, just did one, Attenuation remained the same for downstream, upstream increased to 40.

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  Reply # 888834 3-Sep-2013 11:11
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Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.

 



 

If you are posting regarding DSL speeds please check that

 



 

- you have reset your modem and router

 


 

- your PC (or other PCs in your LAN) is not downloading large files when you are testing

 

- you are not being throttled by your ISP due to going over the monthly cap

 


 

- your tests are always done on an ethernet connection to the router - do not use wireless for testing

 


 

- you read this topic and follow the instructions there.

 



 

Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:

 



 

- Your ISP and plan

 


 

- Type of connection (ADSL, ADSL2, VDSL)

 


 

- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)

 


 

- Your general location (or street)

 


 

- If you are rural or urban

 


 

- If you know your connection is to an exchange, cabinet or conklin

 


 

- If your connection is to a ULL or wholesale service

 


 

- If you have done an isolation test as per the link above

 



 

Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.

 



 

A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.

 



 

I recommend you read these two blog posts:

 



 

- Is your premises phone wiring impacting your broadband performance? (very technical)

 


 

- Are you receiving a substandard ULL ADSL2+ connection from your ISP?




I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.



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Master Geek
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  Reply # 888871 3-Sep-2013 11:57
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Your attainable is around 10Mbps, your Actual Connect rates are around 8.3Mbps. Your speed test is around 7Mbps, all is aligning so far, if you have done a full isolation including jackpoints/filters and modems. You need the wiring checked both internal and external, if you have Mwire contact your ISP for a tech.

 
 
 
 


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  Reply # 888879 3-Sep-2013 12:06
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Lazarui: Your attainable is around 10Mbps, your Actual Connect rates are around 8.3Mbps. Your speed test is around 7Mbps, all is aligning so far, if you have done a full isolation including jackpoints/filters and modems. You need the wiring checked both internal and external, if you have Mwire contact your ISP for a tech.


Getting your ISP to send someone to redo your wiring may not be the most economical (or most effective) way to improve performance. External, sure, that's up to <whoever your provider is in your area>, but internal wiring - that's a different story, and imo usually best to get someone independent (and competent) in to sort it. If you were in the AK/Waikato area I'd suggest Coffeebaron, but it seems you're not, so I'm not sure who to recommend.




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Master Geek
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  Reply # 888884 3-Sep-2013 12:10
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Does attenuation not matter or can you still have low attenuation, but bad speeds? I.e. on the graph in this topic http://www.geekzone.co.nz/forums.asp?forumid=49&topicid=27834 it looks like I should be getting ~20mbits for my attenuation, but house wiring can effect this? Also, where I plug my modem in there is one slot for ADSL (it has a sticker), and another one for phone. Is this good / bad? 

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  Reply # 888896 3-Sep-2013 12:30
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Your speed is way too low for a 16dB attenuation figure.

Get a pro in to sort out your internal wiring and then you can hound your provider to send Chorus out after that.

Edit: just noted what you said about the 'adsl' sticker. This is very good as it means there is probably a splitter already installed. Tell your provider this and get them to send Chorus.

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  Reply # 888904 3-Sep-2013 12:39
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leaplae: Does attenuation not matter or can you still have low attenuation, but bad speeds? I.e. on the graph in this topic http://www.geekzone.co.nz/forums.asp?forumid=49&topicid=27834 it looks like I should be getting ~20mbits for my attenuation, but house wiring can effect this? Also, where I plug my modem in there is one slot for ADSL (it has a sticker), and another one for phone. Is this good / bad? 


Attenuation is generally a good indicator of distnace, but is not the be-all end-all of speed determination.

When you say there is a slot, I presume you're talking about simply a DSL filter? Having a master splitter installed can, in some cases, lead to significantly improved performance.




Windows 7 x64 // i5-3570K // 16GB DDR3-1600 // GTX660Ti 2GB // Samsung 830 120GB SSD // OCZ Agility4 120GB SSD // Samsung U28D590D @ 3840x2160 & Asus PB278Q @ 2560x1440
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Master Geek
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  Reply # 888909 3-Sep-2013 12:50
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Hopefully image is clear? I have two filters off this jack-point, one goes to a phone/fax, and the other goes to the modem.

I also did have a 12dB attenuation download, but it has crept up to 16dB recently. 

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  Reply # 888910 3-Sep-2013 12:54
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Have you got a normal BT (white rectangle) to rj11 (small square) cable?

You can plug your modem directly in to the ADSL jack. No need for a filter on any jacks as the filtering is done at the incoming point.



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Master Geek
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  Reply # 888930 3-Sep-2013 13:15
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Here is inside. If we don't have a filter on, the radio can be heard through the phone (or thats what happens)?

Edit:

Just removed the filter from the internet one, but have kept the telephone one. Internet is still going, but no change with the internet stats.

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  Reply # 888984 3-Sep-2013 14:18
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There should be a master splitter installed, probably at your ETP - you should be able to ditch all the plug in filters.



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Master Geek
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  Reply # 888993 3-Sep-2013 14:30
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Do you mean there is already one installed? How can I check? Or do I need to get one installed?

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  Reply # 889002 3-Sep-2013 14:48
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leaplae: Do you mean there is already one installed? How can I check? Or do I need to get one installed?


If you've got a DSL-dedicated jack, which the labelling of that would imply you do, you would already have a splitter installed. Have your speeds always been this low, or is it a recent development?




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  Reply # 889003 3-Sep-2013 14:48
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When you say 'the radio can be heard' do you just mean you can here a bunch of static?

You should have the modem plugged directly in to the top jack and your phones in the bottom. If the splitter has been put in properly your phone should be clear as a bell when plugged in to the bottom jack with no filter.
If it is noisey, then get a pro to check out the wiring.

Auckland based? PM coffeebaron. He will sort you out.



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Master Geek
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  Reply # 889028 3-Sep-2013 15:14
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Fastest speed I have ever obtained is about 12-13 Mb/s, about December 2012, when I bought a TP-Link W890N because my telecom one was dropping out every hour or so. Back then my attenuation was 12. It has 'crept' up to 16 where it currently is. Speed now is max 10Mbits (not slow, but could be faster?)

I went into the roof space to have a look:

https://i.imgur.com/Kjw4I3C.jpg



There are some black wires (from outside) that go into a white box, which has two beige wires coming out of it, and a smaller grey one. Smaller grey one goes somewhere (didn't follow).

https://i.imgur.com/KMEBBRy.jpg



The beige wires go into this box, where they are attached with the splicers?? into the orange and white wires.
The blue cable is the one that goes to the ADSL jackpoint. The grey cable/s go to other jackpoints (I think)

https://i.imgur.com/ypDOsID.jpg


Is this the filter?? It looks to be made in 2001, is this too old?

Thanks guys.

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  Reply # 889030 3-Sep-2013 15:16
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leaplae: Do you mean there is already one installed? How can I check? Or do I need to get one installed?


If you can locate the external termination point (ETP) where the lead in comes in from the road, you will probably find the splitter there. It will be a black box about the size of 2 match boxes.

EDIT - yep, you've found the filter.

That white box is probably a lightning arrestor. If you could bypass that beige cable with something like cat5, then you may see a small improvement.

That is an old style master splitter. It will be perfectly fine for ADSL,  but can be replaced with the newer VDSL rated on if needed later. The new one is identifiable by having three twisted pairs (green, orange, blue) rather than the two of the older style.

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