Collisions are translated into "packet loss" if I am not mistaken I think on both the CPE radio and AP.
Depends on what you mean by "packet loss". 802.11* use explicit ACK and retries.
When sending unicast traffic, the sender will wait for an ACK from the receiver. If it does not receive an ACK (due to interference, collision or otherwise), it will try to send the packet again.
A packet is lost if the sender is not able to transmit the packet successfully after a few retries (I think the sB radios do ~16 retries), or if the packet buffer in the sender radio overflows (the packet buffer is already full, and it receives another packet from the ethernet side).
So the number of "lost packets" you see when doing a ping test is the number of packets dropped due to full transmit buffer in the radio/excessive transmit attempts, and not the number of collisions on the wireless side.
(note to sB - please look into making as many counters as possible available on your next generation equipment. Makes troubleshooting much easier.)
Lowering the RTS CTS threshold will help minimize that issue.
To a certain extent, at least. I'm grumpy today, so please don't get me started on using a MAC layer designed for indoor use outside. :-/
-- LarsG
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