Re: Outdoor Wireless Access Point

[Shahab Vahabzadeh <sh.vahabzadeh () gmail com>]

Yes Its VoIP over wireless, mostly this university need this wireless
network for their professions and students which carry their IP Phones and
I care about this.
Thanks

On Sat, Mar 31, 2012 at 9:26 PM, Joel Maslak <jmaslak () antelope net> wrote:

> On Mar 31, 2012, at 3:38 AM, Shahab Vahabzadeh <sh.vahabzadeh () gmail com>
> wrote:
>
> > As I look for maps we need at least 3 or 4 outdoor radio, I think in
> these
> > networks the best solution is to have only one SSID in whole network to
> > give mobility for the network, is this called ad-hoc? or it has an other
> > name?
>
> No, it's still infrastructure mode, not ad-hoc.
>
> Ad-hoc means "no access point".
>
> All you need to do is set the APs up to use the same SSID and
> authentication methods, keys, etc.  It's pretty simple and can even be done
> with consumer gear (with less stable performance of course).  If you don't
> put the APs all on the same layer 3 LAN (same subnet), you'll need some
> sort of controller-based solutions so that a user's IP address still makes
> sense to their computer when they move from one AP to another.  If you can
> keep all the APs on one subnet, you won't need that.
>
> It gets a bit more complex if you are using radio to link buildings
> together and/or backhaul to the access point.  There's plenty of good
> references on the internet.
>
> Note that the wireless handoffs aren't perfect on basic 802.11 gear.  Your
> laptop might not pick the best AP if it can hear multiple APs.  And you
> might lose a few packets when you hand-off between APs, but it's typically
> no big deal.   Your ssh session would stay connected across those hand-offs
> just fine.
>
> If you plan on doing VoIP on the wireless, it gets more complex yet - you
> have to worry about the time it takes handoffs and that can be more
> complex.  You have to implement WMM and DSCP.  You need to worry about
> low-speed users (1mbps, 2mbps, etc) on the same link.  It's a lot harder to
> build a VoIP wireless solution than a web browsing wireless solution, but
> still plentty possible to do without expensive equipment.
>
> In summary: you probably should find a guide on how to build wireless
> networks, preferably a vendor agnostic one.  You will either be the hero of
> your organization or the enemy, depending on how well your network works.




-- 
Regards,
Shahab Vahabzadeh, Network Engineer and System Administrator

Cell Phone: +1 (415) 871 0742
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