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BuffyNZ

239 posts

Master Geek


#43592 21-Oct-2009 17:48
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Hi Folks,


I have noticed lately that my upstream connection shocking.


Tonight I decided to investigate further and found that my ADSL modem is making an upstream connection at 139 Kbps. My downstream is at 2813Kbps.


What would be normal?


In am in Burwood, Christchurch, and I am sure I used to get a better upstream than this.


I have tried disconnection the other devices (1 cordless phone with filter and 1 wired phone with filter), then rebooting the modem.


I have tried another modem.


I swapped the phone line cable out.


The only thing I have not done is bypassed the house alarm, which required re-wiring it, but the alarm system has been here for over a year and my speeds dropped only with the last month or so.


Where do I go from here?


Is it worth contacting snap tech support, can they do anything, like get a line test done or get telecom to investigate?




Recursion: See recursion.
--
“It is important not to let the perfect become the enemy of the good, even when you can agree on what perfect is. Doubly so when you can't. As unpleasant as it is to be trapped by past mistakes, you can't make any progress by being afraid of your own shadow during design.”

     --Greg Hudson, Subversion developer


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rscole86
4532 posts

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  #265739 21-Oct-2009 17:50
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If you have a monitored alarm, then it is suggested you get a central filter installed.
Also, what plan are you on?

BuffyNZ

239 posts

Master Geek


  #265740 21-Oct-2009 17:55
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I am on the Pro plan, full rate up and down. I verified my plan was correct by looking at the snap accounts info page.

My understanding was the plan did not effect the upstream and downstream rates your adsl modem connected it, but the speed of the traffic through the PPPoA link.. I could be very wrong though!

The alarm is not monitored (Except by me, via a nifty serial interface into my linux server and served via a home grown app.).

The alarm is still connected to the phone, I know because it sometimes answers it. :P




Recursion: See recursion.
--
“It is important not to let the perfect become the enemy of the good, even when you can agree on what perfect is. Doubly so when you can't. As unpleasant as it is to be trapped by past mistakes, you can't make any progress by being afraid of your own shadow during design.”

     --Greg Hudson, Subversion developer


rscole86
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  #265741 21-Oct-2009 18:02
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I would remove the alarm from the phoneline, and then look at your connection rates again.
Could you post your modem stats for people to look at it too?



Ragnor
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  #265787 21-Oct-2009 20:38
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Yeah standard "isolation" test is a good place to start, eg:

1: Login to the modem/routers ui and find the status page with the line stats eg: SNR, Line Attenuation etc. Take note of the values.

2: Unplug every device from every phone jack, wait a minute or so then plug back in only the ADSL modem/router (leave everything else unplugged for now). Go into the admin ui and check the line stats now. Any difference?


richms
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  #265846 21-Oct-2009 22:24
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This happens to me when the modem syncs at adsl2-re mode. I had to force it to adsl2+ to get good upstream. What modem is it you have? Check the mode in the web interface anyway.




Richard rich.ms

BuffyNZ

239 posts

Master Geek


  #265929 22-Oct-2009 08:03
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The modem is a Linksys WAG160N.


It does not give me much in the way of info about the DSL connection..


DSL Connection:
Status: Up
Downstream Rate: 2535 Kbps
Upstream Rate: 160 Kbps


PVC Connection:
Encapsulation: RFC 2364 PPPoA
Multiplexing: VC
QoS: UBR
PCR:
SCR:
Autodetect: Disable
VPI: 0
VCI: 100
Enable: 1
PVC Status: Up


I also have a 3Com OfficeConnect 3CRWDR101A-75.


It reports:


Line Status: SHOWTIME
Link Type: Interleaved Path


Data Rate
Stream Type Actual Data Rate
Up Stream 102 (Kbps.)
Down Stream 2839 (Kbps.)


Operation Data
Operation Data Upstream Downstream
Noise Margin 12 dB 12 dB
Attenuation 66 dB 52 dB


Defect Indication (2 minutes uptime)
Indicator Name Near End Indicator Far End Indicator
Fast Path FEC Correction 0 0
Interleaved Path FEC Correction 0 352
Fast Path CRC Error 0 0
Interleaved Path CRC Error 0 2
Loss of Signal Defect 0 ---
Fast Path HEC Error 0 0
Interleaved Path HEC Error 0 0


I will look into isolating the alarm system over the weekend, its a big job.


Thanks for the advice and suggestions so far everyone!




Recursion: See recursion.
--
“It is important not to let the perfect become the enemy of the good, even when you can agree on what perfect is. Doubly so when you can't. As unpleasant as it is to be trapped by past mistakes, you can't make any progress by being afraid of your own shadow during design.”

     --Greg Hudson, Subversion developer


RalphFromSnap
776 posts

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  #265961 22-Oct-2009 09:11
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richms: This happens to me when the modem syncs at adsl2-re mode. I had to force it to adsl2+ to get good upstream. What modem is it you have? Check the mode in the web interface anyway.

Spot on.

DSL Type: non.shdsl.opermode readsl.gdmt.al.m2, line.type.pots, latency.interleaved

Your modem is negotiating this despite the port and profile allowing for ADSL2+, in your modem it would be worth while forcing it to ADSL2+ or G.DMT.

Call our helpdesk if you need help doing this - 0800-500-638

Cheers,
Ralph.




Snap

0800 BROADBAND (276 232)
www.snap.net.nz

@SnapInternet on Twitter
Snap Internet on Facebook

Our Social Media Team:
^RO Ricky - Technical Lead
^AT Ashleigh - Retail Marketing Coordinator





BuffyNZ

239 posts

Master Geek


  #265965 22-Oct-2009 09:19
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Thanks!

I will change this tonight when I get home from work and report back how it goes.




Recursion: See recursion.
--
“It is important not to let the perfect become the enemy of the good, even when you can agree on what perfect is. Doubly so when you can't. As unpleasant as it is to be trapped by past mistakes, you can't make any progress by being afraid of your own shadow during design.”

     --Greg Hudson, Subversion developer


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