cwnp.com

RE: RF Math Help :: Home wireless, SOHO wireless, Wi-Fi, Bluetooth, WiMAX, ZigBee, Infrared, wVoIP, RFID

Author: hammerwalk
Subject: FYI
Posted: 05-17-08 03:09 AM (GMT 0)
Topic Replies: 6

When you've got techs setting up Cisco APs that support a/b/g standards, make sure they know that the antenna is connected to the 2.4GHz connection on the AP when you have a b/g/ network... DOH! That was our problem with the "from the field" pos

RE: Proxim 7400 under Windows XP :: Enterprise Wireless LAN Implementation, Management, and Troubleshooting

Author: Drew
Posted: 05-16-08 11:22 PM (GMT 0)
Topic Replies: 7

3 year later bump

RE: Errata for 4th edition cwna book :: CWNP Program

Author: DavidYerger
Subject: RE: ODFM channels
Posted: 05-16-08 10:19 PM (GMT 0)
Topic Replies: 6

sacim: actually 19 and 23 is correct now with the new UNII band (5.470-5.725 GHz), so the table is correct, but the description on page 141 paragraph 3 needs to be updated:

"IEEE 802.11a can use all eight nonoverlapping channels in the lower and

Erratum in CWNA study guide: FHSS channels :: CWNP Program

Author: DavidYerger
Subject: Erratum in CWNA study guide: FHSS channels
Posted: 05-16-08 09:31 PM (GMT 0)
Topic Replies: 0

p. 121, paragraph 1, says

"FHSS uses seventy-nine 1 MHz channels centered on every 1 MHz from 2.400 GHz to 2.4835 GHz"

That's the FCC regulatory range. Should be

"... 2.402 GHz to 2.480 GHz."

which makes sense because aft

RE: Non-line-of-sight, circular polarization :: Enterprise Wireless LAN Implementation, Management, and Troubleshooting

Author: DavidYerger
Posted: 05-15-08 06:23 PM (GMT 0)
Topic Replies: 4

Forget what I said about link budget, that was stupid!

As I understand it now, the mechanism behind the Fresnel zone is that diffracted waves tend to cancel. Circular polarization is supposed to help because the diffracted waves are less likely to can

RE: EIRP clarification :: CWNP Program

Author: DavidYerger
Posted: 05-15-08 06:01 PM (GMT 0)
Topic Replies: 2

Well, EIRP would equal the total power (TPO) if the antenna was an isotropic radiator, but that's just because the dBi gain is (by definition) zero. It's not really a measure of total power, it correlates with maximum power density[/i:0e228

RE: Very Nice book :: Enterprise Wireless LAN Implementation, Management, and Troubleshooting

Author: djkersha
Subject: author?
Posted: 05-15-08 06:02 AM (GMT 0)
Topic Replies: 1

Who is the author?

4.9 GHz questions (quasi wifi related) :: Enterprise Wireless LAN Implementation, Management, and Troubleshooting

Author: Rog
Subject: 4.9 GHz questions (quasi wifi related)
Posted: 05-15-08 05:28 AM (GMT 0)
Topic Replies: 0

I have two quasi wifi questions, both of which pertain to the access and backhaul traffic on some 4.9 GHz radios I'm provisioning.

I have 5 sites with 2 cameras a piece. Each camera has a 3 Mbps streaming requirement. I'm told to use the 4.9 GHz safet

RE: 3rd vs 4th Edition :: CWNP Program

Author: XVII
Posted: 05-14-08 02:00 PM (GMT 0)
Topic Replies: 2

Thank you bryan... forgot i posted this.. ops

Dynamic Vlan Assignment :: Enterprise Wireless LAN Implementation, Management, and Troubleshooting

Author: amsoares
Subject: Dynamic Vlan Assignment
Posted: 05-14-08 12:13 PM (GMT 0)
Topic Replies: 0

Hello group,

I have a customer that is trying to implement 802.1X/EAP-TLS based Dynamic Vlan Assignment but is getting some problems. He's trying to implement this feature using two different Wireless infrastructures:

1) Cisco standalone Access Poin