You can buy a broadband SIP adapter even in a stationery store like Office Depot for around US$60.00 or so, which means the technology is not bleeding edge. Are there any similar devices to allow ordinary analog phones to be plugged into to it, that instead of using broadband (RJ14 connector) as the device's connector to the Internet it will operate over 802.11b to, say, a wireless base station or perhaps in ad-hoc mode? Obviously b is more than enough capacity since you only need about 8K of bandwidth and 11b will give you 10 megabits.
I'm not talking about a portable handset type phone, I'm talking about being able to plug ordinary $10 analog phones (like the kind you normally can plug into a RJ11 POTS wall socket) into a SIP adapter which uses 802.11b instead of broadband. Or it could be 802.11g, only I'm thinking an 802.11b adapter would be less expensive.
Paul Robinson paul (at) robinson-telephone.com