[Voyage-linux] P-t-P Link with 5 ghz (help)

[Frederico Marques]

Hi list,

I'm trying to build a P-t-P link to other area, 1,2km distance with a  
WRAP board and 2 radios. One radio is for my local 2.4 Ghz OLSR  
Freifunk Mesh, and the other radio I want to use is configured in a  
5Ghz to remote location. Both radios are Wistron CM9 mini-pci. On the  
other side there is another WRAP Box with two CM9 radios. I have  
*clear* LOS and I have two pannel antennas pointed at each other,  
both are 5 Ghz 19 dbi from Pacific Wireless. I'm using Voyage Linux  
with OLSRd running on both radios/interfaces (ath0/ath1). The 2.4 Ghz  
6 node Mesh can communicate with the WRAP Box, and all routes are  
propagated, so, no problems with routing. Since I'm not a RF guy, I  
ask you any advice for the 5 Ghz link. I can't connect both WRAP's at  
5 Ghz! I know it is very difficult to try to figure out the problem  
since it can be anything, but I ask what I should check? Some more info:

- Checked the link, with each antenna/wrap 5m away in my lab, no  
problems whatsoever.
- Both WRAP's are in the same frequency/channel, but with other  
channels I don't even have a signal, neither a lousy one.
- I've made the cables with lmr200 and n type connectors. I'm on  
expert on cables or RF, but I did a fast check with a signal injector  
and all was well (I hope). Cable problems?
- Tried different polarizations, but no success.
- Maybe it's a problem with adhoc and atheros/madwifi ?
- Do I need to setup any antenna diversity settings or use the defaults?
- Do I need to check the long distance settings (ack timeout...) on a  
1,2km link?
- Could be a problem of pigtails? I use UFL-to-N-bulkhead ones.
- Checked the link with a 2.4ghz and two Omni 2.4 12 dbi Pacific  
Wireless, and it was great! Good SNR and about 48Mbit rate connection.
- Is there any voodoo or some secret informations about 5 Ghz P-t-P  
links?

I welcome any advice you may have. I'm sorry if this is list is not  
the most appropriate to ask for help.


Fred