[WXC/VFX] Linksys AM300 modem speed - does it go faster than 12Mbps? Or alternative?

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Niel

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#14394 1-Jul-2007 22:37

I am about to upgrade from an old D-Link 502T which supports ADSL2+ at only 8Mbps (unless interleaving is turned off). It also gives other problem. I was looking at the AM300 due to price and because I already have a Linksys wireless router with VoBB ports. The problem is, they say it runs up to 200 times faster than dial-up which I calculate as 56k x 200 = 11200k. Looking at the other Linksys modems, I can not find a spec for the maximum speed. Many other modems advertise "up to 24Mbps", but not Linksys. Can someone please shed some light as to what the AM300 can do?

I am close to the Pakuranga exchange so getting a modem capable of "up to" 24Mbps would help. If nothing else, it will have a better quality front end than a modem that can not go that fast.

If the AM300 will not go faster than 12Mbps, please suggest an alternative close to $100 ($130 max).

Thanks

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cyril7

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#76876 4-Jul-2007 11:25

Hi Niel, the AM300 data sheet states that it complies with G.992.3 and G.992.5. The Former is ADSL2 the latter ADSL2+. The former uses all the features of ADSL2 however only operates in the same 1.1MHz as ADSL1, and thus 12Mb/s max, ADSL2+ increases the band to 2.2MHz and thus 24Mb/s. Based on this info I would be certain it would support full ADSL2+. The data sheet also clearly states ADSL2 and ADSL2+.

ADSL1 has a theoretical 8Mb/s throughput in the 1.1MHz band, ADSL2 increases this to 12MB/s through more efficient carrier packing, 2+ simply expands on ADSL2 specta to double throughput.

Cyril

Niel

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#76896 4-Jul-2007 13:42

My old D-Link DSL-502T also supports the same standards, however Telecom's own testing on a particular setup shows that in interleaved mode it will sync ADSL2+ only to 8Mbps. Switching interlieving off increases the ADSL2+ sync speed to about 17kbps. The generation II models sync faster and some are having firmware development done to resolve issues.

Telecom is busy doing testing of 17 modems at 3 different distances from the exchange and will be publishing the results soon. So far they only published indications of what standard it would connect at, and the maximum speeds that the 502T and 504T will connect at.

So there are ADSL2+ modems that are speed limited and Linsys publish only "up to 200x dial-up speed" which equates to 12Mbps, thus my question what are actual speeds that users are getting. Note that there is also not yet a Telepermit standard for ADSL2+ modems.

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cyril7

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#76900 4-Jul-2007 14:16

Well, I have a few old adsl routers here, and the 502 is one of them, and according to its manual it only only support G.Lite let alone DMT, so guess you are lucky to get as far as you have got.

I suggest you contact Linksys as they are the only ones who could tell you, but hey if it says ADSL2/2+ on the packet and the manual even sites the ITU standards for ADSL2+ then I think there is a pretty good chance the AM300 will work. When you concider it is a new design compared to other ADSL products in the range there is a pretty good chance it should work.

Interesting on the Ascent site the various dlink modems indicate that some of the 502-604 range are only adsl others adsl2 and the newer models adsl2+, the AM300 is listed as adsl2+

Cyril

Niel

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#76910 4-Jul-2007 15:53

Update your 502 to the most recent firmware and it will connect as ADSL2+ but just sync at a low speed. Mine has been for almost a week now.

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cyril7

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#76917 4-Jul-2007 16:43

I dont use the 502, its just one of the many ADSL routers in my collection. I live in a rural area, I dont think the 502 is likely to see the giddey heights of ADSL2+ for a few year yet.

Cyril