Few days ago, I went for field exercise at a military post. The area was over 400 square miles. I was very perplexed when I found the two sites which are 2 miles away, connected via wireless link using omni directional antenna with clear line of sight.. These two sires were using 2.5 ghz range for communication.
My question here in my home . my poor linksystem router is also using2.5 ghz using omni directional antenna, but yet i don't get 2 miles range.
you might say you have a lot of stuff, i.e furniture etc in between your linksytem router and your pc. I don't even get half mile coverage.
You might say transmitted power might be the reason. but then we are using free licence frequency which means the maximum transmitted power allowed is same.
I am just curious as to why we are able to get 2 mile range with 2.5 ghz range in the field while we hardly get half mile in home using 802.11 compliant link system router using same frequency range.
Yet another observation.
An isp is providing wireless Internet using 2.5 ghz range. This Isp has few omni directional antenna ; customers use directional antennas to connect to omni directional antenna.
Here again I noticed few things:
1) Even though customers use directional antenna to connect to omni directional antenna, I don't see clear line of sight between the two i.e trees, houses are in the middle but yet customers are still able to connect.
2) Customers who are more than one mile away, still able to connect to omni directional antenna using their directional antenna. Again same question why?
Very interesting link. WiMax system can be implemented using license or license free frequencies. Lets compare two system:
wimax using 2.5 ghz range,omini direction antenna
802.11 wireless lan using 2.5ghz range, omni direction antenna.
With wimax( using 2.5 ghz range) we can have broader coverage area say 2 miles.
With 802.11 wlan ( using 2.5 ghz range) our coverage area is limited to say 300 meters.
How did we able to get larger coverage area with wimax using 2.5 hz range compare to 802.11 wlan using the same 2.5 ghz range ( keep in mind both use omni directional antennas though not of same characteristics i.e physical dimensions, antenna gain)
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
This is the start of a display filter cross reference between Wireshark and OmniPeek.
The 1st installment is a table of advanced filters. More filters will be added as time allows.
It is a living doc, so check back for changes every so often
Please feel ...
I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...