Access Point Dual band & Dual radio

[Telnet-1-2]

What is difference between Dual  band & dual Radio  ?

is this related to 2.4 & 5 GHz  ... or related to a/b/g & n ?

[Scott Fella]

Dual band means the radio itself has both a 2.4ghz and a 5ghz radio together. A dual band requires an antenna that is capable of both frequencies. The 3600's are a good example of a dual band.

A dual radio is an access point with a separate 2.4ghz radio and a separate 5ghz radio. The 1252 is a good example of a dual radio.

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[SAM MUNZANI]

Scott,

What you explained is logical but what would really help is why people would invest in one Vs another. Which offers better results and why? Is dual radio AP better than single radio with dual band? Why?

[thomas03usmcsf]

It refers to the 2.4GHz and 5GHz frequencies. 802.11b and g utilize the 2.4GHz band, while 802.11a uses the 5GHz band. 802.11n uses both. The differences between a,b,g, and n are supported data rates and modulation schemes.

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[Scott Fella]

One thing to note is Ciscos WLC running v7.4 shows dual-band... this is meant for the 3600's and the module that you put into one of these 3602's.

Thanks,

Scott

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[Telnet-1-2]

Thx alot ,

i'm still a little confused .

when AP is  dual band  & single radio ... what does this mean ?  what does radio mean & what does band mean  ?

[Scott Fella]

Take a look at the data sheet and image for the 3502 and the 3602.  The 3502 has 3 antenna ports for the 2.4ghz and another 3 for the 5ghz.  The 3602 has 4 antenna ports that are dual band which is the 2.4ghz and 5ghz combined.

Thanks,

Scott

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[JASON SIMMONS]

Ahhh! always wondered about this.

[Freerk Terpstra]

Besides the external modules, also the XOR radio in the 2800/3800 access-points is listed as "dual-band" radio (in slot 0).

[Abhishek Abhishek]

Dual band means the radio itself has both a 2.4ghz and a 5ghz radio together. A dual band requires an antenna that is capable of both frequencies. A dual radio is an access point with a separate 2.4ghz radio and a separate 5ghz radio.

Dual-band access points are not only providing increased bandwidth, but it is also fairly using dual-band radios to segregate data types onto the different RF bands. The 5 GHz radio can serve wireless traffic from time-sensitive voice/data clients while the 2.4 GHz radio supports data traffic from laptops. This helps to reduce data and voice traffic contention by creating two separate RF networks.

Since both 802.11a and 802.11n are able to use a different RF band, it is not affected by interference from the possible pervasive 802.11b or 802.11g wireless networks, and is better insulated from overhead activity, such as probes or responses from clients generated by internal and external 802.11b or 802.11g wireless networks.

[Saravanan Lakshmanan]

I think you mean to ask Dual Band Antenna, here both 2.4 & 5ghz antenna is integrated on a single antenna, just to reduce the no. of antennas sticking outside the AP, however each antenna has single feed but divides into two cable leads connecting each to 2.4 and 5ghz radio. There is two separate radios - 2.4ghz and 5ghz, if you open the 3600 AP you can see 4 leads from each radio going to those Antennas. It is an IC can't really say both radios are detachable or integrated in common board, don't want to spoil my one and only 3600 AP

http://www.cisco.com/en/US/docs/wireless/access_point/3600/quick/guide/ap3600getstart.html

The radio and antennas support frequency bands 2400-2500 MHz and 5150-5850 MHz through a common dual-band RF interface.

Each antenna covers both the 2.4 GHz and the 5 GHz bands with a single feed line.

[cacravero]

Hi everyone, I have a customer concern that I would like to know, it's possible select a band for a wlan, for instance, the corp wlan, and another band for other wlan, like guest???