Jump to content
scorpion

Linksys WRT120N is not N certified!

Recommended Posts

My father bought a router last night. He pad about $50.00, or so. Kind of cheap for N router!

 

Wiki

http://en.wikipedia.org/wiki/802.11N

 

Drop down box click the version for downloads.

http://www.linksysbycisco.com/US/en/support/WRT120N/download

 

Here is the link for the manual.

http://downloads.linksysbycisco.com/downloads/WRT120N_V10_UG_NC-WEB,0.pdf

 

I thought 802.11N was on 5.8Ghz??

I thought 802.11N has multi channel transmission?

 

This router is on 2.4Ghz!!

This router only is only single stream!

 

65Mb !!!

 

Here is a look inside!

 

http://www.smallnetbuilder.com/wireless/wireless-features/30882-three-things-you-should-know-about-the-linksys-wrt120n

 

Is this wrong to advertise this way?

 

Are they going to certify single stream N?

Share this post


Link to post
Share on other sites

11n allows 2.4GHz *and/or* 5.8GHz. My DIR-655 has only 2.4GHz (that I can see); 5.8GHz has only just recently started to appear in routers. Note this portion of the Wikipedia article you linked:

To achieve maximum output a pure 802.11n 5 GHz network is recommended. The 5 GHz band has substantial capacity due to many non-overlapping radio channels and less radio interference as compared to the 2.4 GHz band. An 802.11n-only network may be impractical for many users because the existing computer stock is predominantly 802.11b/g only. Replacement of incompatible WiFi cards or of entire laptop stock is necessary for older computers to operate on the network. Consequently, it may be more practical in the short term to operate a mixed 802.11b/g/n network until 802.11n hardware becomes more prevalent. In a mixed-mode system, it is generally best to use a dual-radio access point and place the 802.11b/g traffic on the 2.4 GHz radio and the 802.11n traffic on the 5 GHz radio

 

"Multi channel" can mean different things, but if you're talking about separate independent streams, that's something normally seen on more advanced routers. My DIR-655, for example, has an isolated "guest zone" network. My brother's DIR-825 has a separate channel intended for multimedia streaming, the concept being that it doesn't affect the bandwidth for users on the main channel. There are a number of variations on the concept. All these are in the $100+ range.

 

Edit: BTW, keep in mind, 802.11n is still a *draft* standard - "certifying" products to a "standard" that's not yet written in stone is a specious endeavour at best.

Share this post


Link to post
Share on other sites

OOOkkkk, back on subject. Wireless "N" is a modulation scheme that allows packet aggregation into larger frames, and a more complex modulation scheme (QAM, at the higher rates), for increased throughput (theoretically, up to 600 Mbps).

 

It can be used with one antenna, or multiple (up to four), 2.4, 5.8GHz bands, etc. Multiple "chains" (spatial streams is the proper term) allow for higher throughput, and the ability to use multipath interference to an advantage, instead of a hindrance.

 

Overall, it's a significant advance, especially for video, because the modulation scheme actually favors multiple TCP/IP streams in the transmission (to properly test full speed throughput in "N" rate equipment, you need to have several data streams running at the same time), so it is a good development for our industry. I use quite a bit of "N" rate equipment from Ubiquiti, and the cost to performance ratio is really outstanding (imagine trying to transfer 16 analog streams with conventional analog transmitters a few years ago, just wasn't going to happen).

 

BTW, Rory, I apologize if anything I've chimed in on was offensive to you, I personally intended nothing other than a little mild mannered ribbing over differences of opinion on particular subjects, not any personal differences.

 

The contributions you (and a lot of others here) have made to this forum have been invaluable, and I do not want to see it all devolve over unnecessary personal attacks.

 

I think some differences of opinion will always be there when you get a large group of people together who are passionate about what they do.

 

That doesn't excuse personal attacks, though. On certain subjects, we just need to agree to disagree, and move on.

Share this post


Link to post
Share on other sites

I am just going to keep this on topic because I appreciate everything both Rory and Soundy contribute to this forum even though there are time we have disagreed on subjects.

 

Hardwired..... Where is the best place to get more knowledge on wireless systems? books or websites? thanks it would be a big help

Share this post


Link to post
Share on other sites
I am just going to keep this on topic because I appreciate everything both Rory and Soundy contribute to this forum even though there are time we have disagreed on subjects.

 

Hardwired..... Where is the best place to get more knowledge on wireless systems? books or websites? thanks it would be a big help

 

I've gained a lot of good information from the forum group on Ubiquiti's site, and also the WISP forum group on dslreports.com .

 

Both have a lot of REALLY knowledgeable people on them.. and there are some very interesting debates there, too.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×