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Topic # 70636 28-Oct-2010 00:24
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Hi guys

I'm on the Telecom Adventure plan, running off an ADSL2+ cabinet and with a master splitter in the house. I get decent download speeds but my upload speeds aren't the fastest. Below is the connection stats from my modem (Linksys WAG200G) - do these look right?

 




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  Reply # 396623 28-Oct-2010 00:57
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No, your upstream margin is lower than normal for telecom despite the low attenuation.

Upstream is often affected if there is a line issue, is the phone working ok? I would get onto the ISP in anycase since with 7dB attenuation each way you should be higher for both IME




Richard rich.ms



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  Reply # 396680 28-Oct-2010 09:16
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Thanks for that Rich, getting a line check done now.




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  Reply # 396698 28-Oct-2010 09:45
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I would put some money on your modem, get yourself a non Linksys device, preferably a modem with a Broadcom chipset, Linksys make some of the worst modems for the NZ network, avoid.

Cheers
Cyril



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  Reply # 396701 28-Oct-2010 09:53
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Just tried my Speedtouch modem with the same result... I just can't seem to get an upload breaking 500kbps (compared to downloads of 8-10Mbps).

Huh. Spoke to a charming off-shore helpdesk guy who told me that Telecom hasn't invested in the upload infrastructure as much as the download (priorities, you know), and I'm not likely to get a better service until that happens. Laughing




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  Reply # 396708 28-Oct-2010 10:01
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OK, the speedtouch modems also have a non ideal chipset (TI) but they normally dont suffer from poor upload speeds. As rich says your noise margin is not ideal, as a comparison my stats are:

Atten Dwn/Up, 8.5/3.1
Noise Margin, 11.8/16
Sync, 17800/945

So yes your noise margin is well under par, either a line fault or something that may not be easily fixable. Noise issues come from a variety of sources being, too many other DSL subscribers in the same cable wrapper, too many of those on ADSL1 which has poorer power control, SHDL services in the same wrapper, or interference from external sources such as AM radio transmitters or similar.

Cyril



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  Reply # 396714 28-Oct-2010 10:08
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Line diagnostic from Telecom didn't pick anything up, so I'll just have to assume that it's one of those other environmental factors. I wish we had cable in Tawa [sigh].

Cheers Cyril! 




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Reply # 418041 16-Dec-2010 11:13
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Okay, I'm getting frustrated and lost with this issue. Although the overall house wiring is old, I'm not 100% convinced it's the fault as the Telecom tech installed a master splitter and I'm pretty sure he ran a new cable to the outlet.

I've run isolation tests, except for the monitored alarm which goes into the splitter, and people tell me the alarm shouldn't be making that much of a difference.

I'm now wondering if I need to get a new modem as a few threads say that older Linksys models struggle with the ADSL2+. Should I be looking for a new brand or are the newer Linksys models okay? 




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  Reply # 418070 16-Dec-2010 12:26
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Avoid Linksys, period, try TP-Link

Cyril

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  Reply # 418078 16-Dec-2010 12:49
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If you're feeling brave, there is some custom open source firmware for the WAG200G
http://openwag200.sourceforge.net/

Probably nothing to lose if you are considering replacing it because of the upload rate.

Alternatively just get a TP Link TD 8840 for <$60 use that as the modem and primary router and connect the Linksys WAG200G in "wan bypass mode"

WAN Bypass Mode Guide Here
http://forums.whirlpool.net.au/forum-replies.cfm?t=933517




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  Reply # 418088 16-Dec-2010 13:12
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Cheers guys, hadn't heard of TP-Link. Just checking out the TD-W8960N on Ascent now. Laughing




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  Reply # 418110 16-Dec-2010 14:00
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Nightwyrm: [snip]
Huh. Spoke to a charming off-shore helpdesk guy who told me that Telecom hasn't invested in the upload infrastructure as much as the download (priorities, you know), and I'm not likely to get a better service until that happens. Laughing


Chuckle... I work for Telecom and stories of comments like that from our helpdesk make me wince. As you're probably aware, that line you were fed is top grade BS :-)

As for your specific problem - I had a similar situation where I had good DS performance (14-17m) but similar bad upstream (4-500kbps). I never specifically figured out what fixed it, but it was better after I had an alarm installer come out and clean up the cabling in my house to get an alarm monitored. He made a comment it was a mess due to a previous person pulling out some alarm wiring and he just "tidied it up".

Whatever he did improved the US (500 -> ~800kbps) and didn't change the DS rate...

Sorry I can't be more specific...

Cheers - N

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  Reply # 418129 16-Dec-2010 14:48
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Generally it seems to be that the IKANOS line cards being used by Telecom wholesale/Chorus in cabinets and exchange ISAM/DSLAMS seem to have a number of odd compatibility issues with various older ADSL2+ chipsets in modem/routers.

Seems like anything using a broadcom chipset is OK (Thomson, Dynalink, TP Link etc) but many of the devices using Texas Instruments, Globalspan, Connexant chipsets like older Linksy, Netgear, Belkin devices are having odd issues.

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