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Hi,

We have got a project related to Wireless with cisco 1600 series Aps and 2500 series WLC.

I am going for site-Survey in soon.

I am sure , first customer asks the following  questions  ?

1) How to find a LWAP Access point coverage ,How much distance  1600 series Access coverage?

2) Is coverage depends on freequency bands 2.4Ghz and 5Ghz or others ?

3) Which protocol gives more benifits 802.11 a/b/g/n?

4) what setting should confugure in WLC  for  clearing  interferences (doars ,closed rooms,mirrors etc)

5) What is dbi means ,which value is good , is lower or higher?

Pls help with basics then i will reffer books to gain knowledge

Regards
Ram

Simply put, dBi is the measurement of gain when compared to a theoretical antenna.  An antenna with 3dBi gain is weaker than an antenna with 13dBi gain (if they're the same type and orientation).

Reading a spec sheet will not detail how far an AP will propagate in a building with obstacles such as walls and doors.  The specifications will only really tell you how far a data-rate will be sustainable in an open area and at a certain receive strength.  This value is in dBm and is ALWAYS a negative number.  When looking at dBm values, SMALLER numbers are better (ignoring the - sign), so -91dBm is WEAKER than -35dBm.

Strictly speaking 802.11n is an enhancement not a frequency, so when asking which is better it is usually correct to include the frequency in the same sentence as 802.11n.  Therefore as an example, 802.11n is better when used at 5GHz (802.11a) as you have the ability to use 40MHz channels to provide twice as much bandwidth as 802.11n at 2.4GHz.  However, if you're wanting to know which propagates further, this is usually 802.11n at 2.4GHz (depending on the construction of the building, etc).

There are no settings available on any WiFi system to clear interference caused by closed doors, etc.  Technically an obstacle such as a door won't cause interference - it is merely a solid object which will only reduce the receive signal strength as the radio wave passes through it.  However objects such as fluorescent lights will cause slight interference and should be avoided in the path between the AP and clients.

You can use CleanAir to assist the WLC in actively monitoring the RF environment in order to dynamically change channels, etc, but the 1600 APs only use CleanAir Express, so it's not as active as CleanAir when used with a 2600 or 3600 (for example).

Please read this link:
http://www.cisco.com/en/US/products/hw/wireless/ps458/products_tech_note09186a008009459b.shtml
http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/product_data_sheet09186a008008883b.html

see attached file,prod-technical-reference09186a00.xls




Yes, of course


n is better and  covered all IEEE802.11a,b,g standard now most people are using g



I don't understand what you mean, please write it more



One more theoretical construct needs to be understood. That is Decibels (isotropic) or dBi. It is the gain in radiation intensity of an antenna. As high as better

http://www.techrepublic.com/blog/data-center/80211-time-to-clear-up-some-antenna-misconceptions/