Hi Jerome,

Thanks for replying

Can't upgrade to "E" type Cats - too expensive, no point taking the radio out - if I do it is a waste of investment in dual radio AP, so it looks like I will have to buy the Power Injector module.

Regards

Haha, same choice made on my side!

:-)

Same Problem here!

Another question: what are restricitons if i use

only 1 Module. Do i have 2 choose between a/n or

g/n or a/g combination in this case? Dont really understand, what is the benefit 2 make 1252 modular.

You have to choose between 5Ghz radio (a/n) and 2.4 Ghz radio (b/g/n)... the benefit of having a modular 1252 is (probably among others) that if the final 802.11n protocol is very different from draft 2.0, on which the 1252 is based, you'll be able to exchange the radio module you plan to use 802.11n on...

and hey, with one module only you can use your AP with a classical PoE...

You can purchase the 1252 with no radios, one radio or both. That makes it modular... some don't require the 5GHz radio and might just purchase the 2.4GHz.

If you want to run 802.11n, then you will have to run that on the 5GHz radio unless you only have one AP in which you can run it on either the 2.4GHz or the 5GHz. The reason being, is channel reuse. When you bond two channels on the 2.4Ghz, you have to use 2 out of the three which limits you only having one channel for a neighbot ap on the 2.4GHz. 5GHz has more channels you can use and that is why 802.11n will be most likely deployed on the 5GHz side.

Thx and sorry for dumb questions. Im new in Cisco Whireless World.

Another Question to the Topic: If i understand it right, Power Injector is the cheapest choise in combination with a 2960 PoE switch for using 1252AG with two radios?

Do i need a PoE Switch in this Case?

Hi Reitenbach,

If you use a power brick, you don't need anything else, your 2960 can be PoE or not on that port, it doesn't matter, and yes you can then use both radios.

hth

jerome

My goal is 2 create a closed whireless network.

If i use Power injector 4 each AP, so i dont need a switch in this installation?

Well, APs provide access to wireless clients to... what, in your case? You probbaly want to connect your APs to a switch so that wireless clients to one AP can send information to wireless clients on another AP... or do you have a different setting in mind?

2 another clients in a network established by 6-12 AP's and controlled by a wlc

Then you definitely need a switch (unless you have different sites and routers) to connect your APs and your controller, so that all can communicate with each other. If you have a power supply, the switch does not need to be PoE.

hth

Doesnt the clients using AP's to communicate with each other?

Well yes, if the clients are in range of the same AP, they will use the AP to communicate with one another. But if you have several APs, say one AP in one room and another AP in another room, then usually signal travels from wireless client 1 to AP 1 via the radio, then AP 1 forwards the packet over a cable to a switch that relays to the second AP, then the second AP relays the signal wirelessly to the second client. This system is used because usually APs would not use their radio to talk to each other, for many reasons.

In your case, if you have a controller, Aps need to talk to the controller, and the controller doesn't have any radio anyway, so you need cables to connect to your controller. If it is a 2100 controller, you can forget the switch and connect your APs to the controller.

If you have a 4400 series, you need a switch as APs cannot connect directly to 4400 controllers.

Cheers

Jerome