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79 posts

Master Geek
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Topic # 185730 3-Dec-2015 01:15
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I have had Spark VDSL for about 2 years. When first set up, the modem (Technicolor TG589vn v2) described the connection as:

DSL Type: ITU-T G.993.2
Bandwidth (Up/Down) [kbps/kbps]: 2,216 / 17,549
Output Power (Up/Down) [dBm]: 6.3 / 12.7
Line Attenuation (Up/Down) [dB]: 56.4 / 21.5
SN Margin (Up/Down) [dB]: 11.9 / 13.8

Recently I was pleased to see my download speed almost double. Unfortunately my upload speed has gone down by more than half, to less than 1Mbps:

DSL Type: ITU-T G.993.2
Bandwidth (Up/Down) [kbps/kbps]: 992 / 30,584
Output Power (Up/Down) [dBm]: 9.0 / 16.8
Line Attenuation (Up/Down) [dB]: 10.0 / 23.8
SN Margin (Up/Down) [dB]: 9.7 / 8.9

Can anyone suggest why my upload speed is so low compared to my download speed? Is there anything I can do to improve upload speed?

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5385 posts

Uber Geek
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  Reply # 1439635 3-Dec-2015 01:15
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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.



1828 posts

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  Reply # 1439648 3-Dec-2015 01:38
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DSL Type: ITU-T G.993.2 ..... Shouldn't that read as G.998

 
 
 
 


'That VDSL Cat'
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  Reply # 1439650 3-Dec-2015 01:41
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You have moved to 998.

Please review following thread.

http://www.geekzone.co.nz/forums.asp?forumid=49&topicid=176892 




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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.




79 posts

Master Geek
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  Reply # 1439658 3-Dec-2015 02:20
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Thanks - it looks like the move to 998 is responsible for my change in speeds.

However, my upload speed is far slower than those mentioned in the linked thread. Is there anything I can do to improve it?

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  Reply # 1439672 3-Dec-2015 07:20
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bakery2k: Thanks - it looks like the move to 998 is responsible for my change in speeds.

However, my upload speed is far slower than those mentioned in the linked thread. Is there anything I can do to improve it?


you are a boarderline line so it is to be expected with lines like yours

there is not a lot you can do about it unfortunately

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  Reply # 1439689 3-Dec-2015 08:18
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bakery2k: Thanks - it looks like the move to 998 is responsible for my change in speeds.

However, my upload speed is far slower than those mentioned in the linked thread. Is there anything I can do to improve it?


Assuming you have a master filter in place the answer is no.

You had a very poor connection in the first place and your slow upstream indicated major issues. The bandplan move to 998 is not a magic fix for this, and in your case the frequency move has made the connection worse.



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Ultimate Geek
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  Reply # 1439746 3-Dec-2015 09:58
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Can you PM me your line number so I can take a look at it?

 

No guarantees we can improve it whatsoever, but would like to take a peek.




My views are my own, and may not necessarily represent those of my employer.

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Ultimate Geek
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  Reply # 1439983 3-Dec-2015 16:06
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I've had a good look at it, and unfortuantely (for the upstream speed) the line is performing as good as it should given the new 998 band plan.
Luckily for bakery2k, UFB is available at his address. :)




My views are my own, and may not necessarily represent those of my employer.



79 posts

Master Geek
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  Reply # 1440603 4-Dec-2015 15:42
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I would like to thank cbrpilot for his thorough investigation of this issue. It seems that (although I am only 500m from the cabinet) my line length is approximately 1.3km, and my speeds are as expected for a line of this length. It is probably not possible to improve my upload speed using VDSL.

Would switching to ADSL improve upload speed? Perhaps (is it possible to get much above 1Mbps on ADSL?), but the trade-off would be reduced download speed.

It seems my best option is to upgrade to fibre...

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  Reply # 1440617 4-Dec-2015 16:19
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bakery2k: I would like to thank cbrpilot for his thorough investigation of this issue. It seems that (although I am only 500m from the cabinet) my line length is approximately 1.3km, and my speeds are as expected for a line of this length. It is probably not possible to improve my upload speed using VDSL.

Would switching to ADSL improve upload speed? Perhaps (is it possible to get much above 1Mbps on ADSL?), but the trade-off would be reduced download speed.

It seems my best option is to upgrade to fibre...


Why would you consider ADSL? Surely fibre is the most obvious solution?





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Master Geek
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  Reply # 1440745 4-Dec-2015 21:26
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cbrpilot and I discussed three options: VDSL, ADSL and Fibre. Each has pros and cons. Ultimately, however, we agree:

bakery2k: It seems my best option is to upgrade to fibre...

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