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 <jmas...@antelope.net> wrote: > On Mar 31, 2012, at 3:38 AM, Shahab Vahabzadeh <sh.vahabza...@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 PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81 C2EE 76A2 46C2 5367 BF90
