Re: Recomendations for AP

11e will likely never work as all clients must support it or it fails.  QoS 
matters quite a bit on a metro scale - for small LANs, it should not be too 
much of an issue unless you are moving heavy amounts of data or have a few 
calls at once.


ty


----- Original Message ----- 
From: "Casey Halverson" <[email protected]>
To: "SeattleWireless Talk List" <[email protected]>
Sent: Monday, February 27, 2006 10:42 AM
Subject: RE: Recomendations for AP


I have done a considerable amount of work so far in the "WiFi VoIP"
world.

A couple things to note:

1. Don't worry about QoS, especially with <8 handsets.  In a lot of case
studies, 802.11e (QoS) was completely useless -- if you can even find
compatible clients and AP's.  You will be able to support about 12-16
conversations without any issue on WiFi, assuming that you operate at a
reasonable data speed.  Use G.723/G.729 for best results.

2. A lot of WiFi VoIP handsets have no concept of access point roaming.
Some, like the Zyxel, treat each BSSID as a different access point --
even if there are 10 of them with the same SSID network name.

3. 2 access points in a 60,000 sq ft area would not be recommended with
a lot of WiFi handsets out there.  You will need more -- especially if
there are obstructions.  Depends on the facility, roof height, etc.  I
would definitely get ceiling omni's.

In regards to security, ask yourself these questions:

1. Do your conversations really need to be secure?

2. Will your customers have security/confidentiality requirements?

3. Are you using WiFi because portable phone systems do not offer the
level of security you require?

If your answer is no to any of the above three questions, then you do
not really have any encrypted security requirements.

If you cannot do WPA on your handsets, don't bother with WEP.   It will
have too much overhead and very little benefit.

I also want to note that a lot of cellular standards have been subject
to eavesdropping for a long time.  Your network interface box to the
PSTN on the side of your building is likely unsecured, and your internet
connectivity is not secured.

WiFi security is just one small piece of this whole thing..


> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Dejan Nikic
> Sent: Friday, February 24, 2006 6:30 PM
> To: SeattleWireless Talk List
> Subject: Re: Recomendations for AP
>
> Well we already bought the headsets, but I'm not 100% sure on
> the specs.
> We're geting the whole VOIP system installed bunch of wired
> phones and few wireless, so I'll have to check and see what
> the phones support.
>
> Any more suggestions as to what APs to use for commercial
> applications?
> something a little more rugged and reliable.
>
> On Fri, 2006-02-24 at 17:50 -0800, [email protected] wrote:
> > Real world usage, Ken. Real world. Very, very few
> environments will see someone bother to run WEPCrack on a
> voice stream.
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