Hello everyone!
I've been emailing about this topic with Michael for a few days, now I've found this forum topic. There's a very good article about Hamnet in Germany here:
http://db0fhn.efi.fh-nuernberg.de/doku.phpThey use WDS bridges for point to point links, as SSIDs in WDS bridge endpoints doesn't have to match, bridging is done via pairing the peers' MAC addresses, so every peer can use it's radio amateur callsign as SSID. On the radio layer they use the Mikrotik specific Nstreme protocol, which uses client polling thus avoids the hidden station problem and it's more suitable for long distance links. They encode their callsigns also in the hw MAC address:
http://db0fhn.efi.fh-nuernberg.de/doku.php?id=projects:wlan:proposalI strongly suggest we should use Mikrotik devices on the backbone network with Nstreme (maybe Nstreme2). I've tested a Mikrotik 433UAH with one Atheros AR5413 802.11b and one unkown (possibly Atheros, but I was lazy to open the case of the RB

) 802.11n card in it. If I switch the cards to superchannel mode, I can choose between 2192-2539mhz and 4800-6075mhz. I've also looked at a Ubiquity NanoStation2 Loco, switching the country code to compliance mode allows me to choose between 2312-2484mhz. I would recommend ham clients to use (preferably 5ghz) Ubiquity stuff as they can be used outdoors and have an easy interface, good build quality and good price.