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3nvy

104 posts

Master Geek


#21070 15-Apr-2008 08:59
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Hi everyone, this is a bit of a follow up from my post in the Telstra forums. To get you quickly up to speed, here was (part) of the last post;

Hi, you say you get 4.5-5Mb/s, is that what your modem supports or what speedtest gives you. As I say 2doors along I had a modem connection speed of 7.6Mb/s which is full chat for ADSL1, and the attenuation and S/N showed a good line. What does you modem report on these details.

If the exchange is ADSL2+ enabled then with an ADSL2+ modem you should get a connection at a higher ADSL2+ rate assuming your within that 1.5-2km region (which you should). As far as I know all the exchanges in the central city have been upgraded. Some ISPs limit you speed regardless of the fact that your connection is capable of higher, however most will go as fast as the connection allows, ie upto 24Mb/s, many folk are reporting 16-18Mb/s speedtest throughput, however you have to have a full uplink speed account to let speeds much over 4.5Mb/s occur as a 128k uplink will limit TCP throughput, ie you cannot ack fast enough. This is the only extra cost assuming your line connects at higher than 5-6Mb/s, ie you must be on a FS/FS plan to realise connection speeds over 5-6Mb/s.


So a few things just quickly;


1) Have the Wellington central exchanges been upgraded to ADSL2? (I believe the exchange is on featherston street, about a km away or so)


2) My ISP is Xtra, do you know if they'll limit my connection speed?


3) To get full ADSL2 connectivity, I'll need to go on the 'Pro' plan (for an entry level plan) correct?


4) How do I check what speed I'm currently connected at? The 4.5 - 5mbps speed I'm getting is when downloading from foreign hosts. I've yet to try a speedtest!


Thanks,


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zar

zar
81 posts

Master Geek
Inactive user


  #123595 15-Apr-2008 09:22
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I was getting 12mbit the other night on xtra with a Linksys WAG54G, then it blew up, won't boot now haha
Now using a Dlink G604T with firmware upgraded, says connected with ADSL2+ but won't sync higher than 7.5mbit / 900kbit

meh, maybe i'll try another modem yet again..

3nvy

104 posts

Master Geek


  #123688 15-Apr-2008 15:26
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What plan are you on? FS/FS? Or FS/Capped?

Cheers.

 
 
 
 


zar

zar
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  #123692 15-Apr-2008 15:38
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I'm on the Pro plan so FS/FS

3nvy

104 posts

Master Geek


  #123695 15-Apr-2008 15:53
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Hmmn, okay, how far are you from your exchange?

I thought 12mb was slower than what you'd expect to get from ADSL2

zar

zar
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  #123726 15-Apr-2008 17:22
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I have no idea heh I'm in clifford road, jville - duno where the exchange is

You would think considering the max is 24mbit
but 12mbit was pretty nice, till the modem fried lol

3nvy

104 posts

Master Geek


  #123907 16-Apr-2008 08:39
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Unfortunately I dont know where the JVille exchange is either.

Ahh well, thanks for your input so far.

Does anyone have anything else regarding ADSL2 they can shed light on? =]


Nightwyrm
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  #123917 16-Apr-2008 09:18
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3nvy:

Unfortunately I dont know where the JVille exchange is either.


The Jville exchange is on Johnsonville Road (between Jville Fish Supply and Animalz).  I live ~1.25km from the exchange as the crow flies or ~2.2km driving, and I get an ADSL line down speed of ~4.2Mbps (using either a DLink DSL-502T or a Linksys WAG200G) on a Xtra FS/128 plan.

Also, check out this thread: http://www.geekzone.co.nz/forums.asp?forumid=49&topicid=20163 (explains my line speed somewhat).





Post-geek, opinionated mediaphile, and natural born cynic. Jack of all genres, master of none.

 
 
 
 


3nvy

104 posts

Master Geek


  #123952 16-Apr-2008 10:52
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That post makes sense and confirms a bit about what I already know.

None the less, it was informative, cheers :)

cyril7
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  #124119 16-Apr-2008 17:12
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Have you actually checked your modem (not speedtest) to see what connection characteristics it shows, ie connection speed, attenuation and S/N, these will dictate what true speeds you can achieve once plan/isp details have been accounted for.

Cyril

3nvy

104 posts

Master Geek


  #124274 17-Apr-2008 08:49
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This may sound rather stupid, but I dont actually know HOW to test my modem connection.

Also, did you goto the pizza night last night Cyril?

Nightwyrm
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  #124275 17-Apr-2008 08:53
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If you go into your modem configuration "website" (e.g. DLink is 10.1.1.1), then there'll be a tab somewhere called "ADSL".  On there, it'll show your connection statistics like your connection speed, etc..  If you have trouble with this, let us know what modem you're using and we should be able to steer you in the right direction.

(great pizza night, slightly sore head today!)




Post-geek, opinionated mediaphile, and natural born cynic. Jack of all genres, master of none.

cyril7
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  #124276 17-Apr-2008 08:54
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No Pizza for me, would have liked to but had prior engagements.

What brand/model modem is it, you probably mentioned it earlier. But normally if you log into the modem via the web interface there is a status or statics page for the ADSL WAN interface, it will be there, in particular connection rate, attenuation and Noise or Signal to Noise are of interest.

Cyril

3nvy

104 posts

Master Geek


  #124303 17-Apr-2008 10:06
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I can't remember offhand and I'm in the office at the moment so I can't just take a quick look, but I believe the router is a 504T..

I know how to get into the interface, I just never really have had a look.

Thanks, I'll have a look tonight and I'll let you all know!

Thats a shame about your engagements, I was keeping my eye out for someone with a Hi, My name is Cyril7 tag.

3nvy

104 posts

Master Geek


  #124475 17-Apr-2008 18:55
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Hokay, so I got home and checked out my ADSL status.

I can't really make heads or tails of it and I don't really know what I'm looking for.

Hopefully this will mean something to someone;

http://img208.imageshack.us/img208/3213/adslstatuslk7.gif

Thanks guys.

Speedtest.net states I get 4.2mbps to Auckland and 4.0mbps to LA. Odd.

cyril7
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  #124497 17-Apr-2008 19:32
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Hi, well you D-Link is actually connected at ADSL2+, however the issues with these GenI D-Links means it wont go over 7-8Mb/s connection. The reported attenuation of 23dB indicates your around 1.7km of cable from the DSLAM, so if you got a full capable ADSL2+ modem you should most likely expect down load speeds north of 16-18Mb/s. A S/N of 15dB is good, infact very good.

You current limitation to 4-5Mb/s is a result of you plan which has a 128kb/s (160kb/s connect) upload, hence limiting your ack rate, so limiting throughput to around 4-5Mb/s.

I suspect that if you replace your modem with a fully compliant ADSL2+ one (ie not D-Link GenI) and move to a FS/FS plan you should expect download speeds north of 16Mb/s and uploads or around 1Mb/s.

Cyril

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