On Tue, Aug 01, 2006 at 06:01:40AM -0600, Diana Eichert wrote: > On Tue, 1 Aug 2006, Jonathan Gray wrote: > SNIP > > rx and tx are not yet working, if you want a USB device that can > > act as an AP now look at the hardware list for ural(4) but be > > careful as some vendors have replaced chips with the second > > gen ones rum intends to support and not changed part number. > > Jonathan, thanks for the reply. > > reading ral(4) > > The RT2500 chipset is the first generation of 802.11b/g adapters from > Ralink. It consists of two integrated chips, an RT2560 or RT2570(USB) > MAC/BBP and an RT2525 or RT2526(USB) radio transceiver. > and > The ural driver supports automatic control of the transmit speed in > BSS mode only. Therefore the use of a ural adapter in Host AP mode > is dis-couraged. > > So I should look for a RT2570/RT2526 combination? Anyone know of a USB > adapter with external antennae connections? I have an old 802.11b Prism > USB adapter that had external antennas. If I set the speed to 54MBps it > will stay locked? Not a problem as I want to put a bi-quad at the focal > point of an 18" parabolic dish at either end. Then again, since this is > point to point, I don't really need to configure as an AP.
Most of the adapters don't have specific connectors built into the cases but have places you can connect an appropriate pigtail to. Various people have soldered appropriate connectors to boards in the past as well. I think there are at least some that have some kind of external connector out of the box but I can't remember names. By default the rate adaptation algorithm is used (AMRR for ural) but you can specific a specific rate via something like "ifconfig ural0 media OFDM54" or the equivalent hostname.if(5) setting. Higher speed rates don't tend to pan out so well for long distances.
