I run 2 wireless AP's. with different SSIDs, and at different channels so they dont interfere. All the laptops etc have been authed on both and they pick whichever has the best signal at any given time.
As others have mentioned, keep them all on the same subnet and get your router
to do the DHCP and then it doesn't matter if your iPhone switches AP it will still
keep the same IP address.
Something else I have done is get separate units for everything. An all in one
router-wireless-VOIP etc... is nice at the start, except when you need to restart
something. I have seprate wirells, to the router, and the VOIP is different again.
That way, when 1 device is flaky or needs a kick it is only that bit that you lose.
ie, if VOIP is playing up, I can reset the ATA and it doesn't kill the router or wireless.
Also consider getting a router that is easy to configure with QOS (quality of service).
That way you can give VOIP traffic high priority and other things like torrent low
priority. You can also guarantee bandwidth for browsing so things like iView
and torrents don't make surfing pwrx a pain.
Plenty of good advise already in this thread.
P.S. Make sure the AP's use WPA2 with AES. TKIP has a security flaw in it.
