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How to choose the right router

April 25, 2013
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To choose the router or upgrade your home network, first you should know what standard you need.
There are three main standards on market now.
Standard Max Speed
802.11g 54Mbps
802.11n 600Mbps
802.11ac 1.3Gbps
802.11g was introduced many years ago, I wrote a post eight years ago related the wireless network.
802.11ac is still a draft standard. It means most products from different company are not same. They may not work together compatibly. The good news is that IEEE will issue the final approved version of 802.11ac the end of this year 2013. Here is the timeline.
The Max Speed described above is in theory. When the router working inside the house, walls, furniture, these kind of obstacles reduce the speed by 50%.
There are also frequence, bandwidth, channel issue for your router.
for 802.11g, 2.4GHz, there are 13 channel. 20MHz each channel
for 802.11n, 2.4GHz or 5GHz, 20MHz each channel, bonding channels.
for 802.11ac, 5GHz,
Bonding channels is double the bandwidth, or 40Mhz. It means faster.

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Cordless phone and Wifi conflicts

September 20, 2008
4 Comments

There is a very strange thing happen between my Wifi connection and cordless phone.
I use D-Link WBR 1310 wireless router and WUA 1340 adapter.
I also have a cordless phone which works on 2.4Ghz. It is Vtech cordless phone.
When I take a phone call with this cordless phone, my wifi connection will be lost.
I also have another cordless phone. It is GE DECT 6.0 TC28223EE3.
It works OK when I use wiless internet connection.
I Googled it and got the answer.

802.11b and 802.11g use various frequency bands within 2.4GHz
802.11a uses various frequency bands within 5.8GHz
Cordless phones currently appear to come in 900MHz, 2.4GHz, or 5.8GHz.
Note that some “5.8GHz” phones will transmit in one direction using 5.8GHz, but in the other direction using 2.4GHz.

The wiless router is working on 802.11g. It is 2.4Ghz. It is same as my 2.4Ghz cordless phone.
So the problem appears.

Most 2.4GHz cordless phones are “spread spectrum’ – in other words, they stomp all over the range of spectra that your 802.11b and 802.11g want to use – and these wifi technologies more cooperatively use one portion of the 2.4GHz spectrum (generally user-selectable).

This paragaph answers my another question. Why cordless phone is OK, but wifi stops working.
So I know the problem, but how to solve it.
I have to use Wifi on 802.11g, because of my Wii and Nintendo DS need it.

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