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213 posts

Master Geek


Topic # 23422 28-Jun-2008 23:56
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Hi guys, I`m totally hopeless at these networking issues. Been with Telecom Xtra for 2 years, but have no use for the phone line apart from the internet, so I`m planning to go naked DSL.

At the moment, my router`s ADSL status is saying this:

Modulation ADSL_2plus
Annex Mode ANNEX_A
Max Tx Power -38 dBm/Hz
 
Item Downstream Upstream Unit
SNR Margin 25 37 dB
Line Attenuation 14 7 dB
Data Rate 7547 165 kbps

Does this mean I have an ADSL 2+ connection? My modem is a D-LINK DSL-502T/TX supplied by Telecom.

And the data rate, what does it mean? Is that the maximum my line allows? I hear people mention much higher values than that so I`m not sure what gives. Because theoretically I`m on a FS down and 128kbps up plan. So if I go FS both ways, what kind of speeds can I expect? I`m in Auckland Central, on the top of Queen Street.

 

Thanks for any input.





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  Reply # 141146 29-Jun-2008 04:13
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Hi, you should be able to get a download speed of 18-20Mb/s, however with a upstream of 128k (ie not FS/FS) then you will never achieve more than around 4.5Mb/s.

The modem you have has a problem, this is well known, that even when on ADSL2+ is will never sync more than 7.6Mb/s. There is a firmware fix but this does not really fix the problem, my advise get a new modem. Anybrand but what you have.

Cyril



213 posts

Master Geek


  Reply # 141149 29-Jun-2008 08:11
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Thanks for the reply.

If I go FS/FS, what kind of upload speeds can I expect?

And what kind of modem would you suggest that you know is great value for money?





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  Reply # 141158 29-Jun-2008 09:27
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Hi, based on your line stats, on FS/FS you should get full Annex A upload speed in the 800k to 1Mb/s region. As for modems, my general recommendation is anything with a Broadcom chipset, these seem to have good ADSL datapumps and decently powered processors for good routing performance.

Everyone seems to have some varied experience, however I have had really good results with DSE modems lately, having installed quite a number, not one sofar has mis behaved. The XH9949 is currently on special at $69, has a 4port switch and Broadcom chipset, if you want wireless then the XH9950 is reported to be good, I have not used it but again its got the same Broadcom chipset. Both of these modems appear made by TP-Link which is another good brand.

Cyril



213 posts

Master Geek


  Reply # 141192 29-Jun-2008 12:32
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Great stuff, Cyril. The DSE XH9949, does it support port forwarding?




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  Reply # 141254 29-Jun-2008 16:22
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Yes, port forwarding (aka virtual servers) have been standard NAT router functions on every router I have seen for some years now.

Cyril



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Master Geek


  Reply # 141259 29-Jun-2008 16:45
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Thanks for the help, I`m gonna buy that modem and subscribe for a FS/FS  nakedDSL. Is it possible to go from normal Xtra broadband to Xnet`s nakedDSL? Cos a while ago I heard that Telecom is making it hard for ISP`s to switch people over to naked DSL services.




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  Reply # 141265 29-Jun-2008 17:03
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I dont believe there is any issue, purhaps in the early days of NDSL but those details have been sorted, Xnet dont indicated any issues on their website.

Cyril

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