Expert Q! Does Nstreme2 operate at layer 2,3, or both?

To confirm what I thought I was sure of before…considering normal 802.11abg has underlying communication mechanisms for packet acknowledgement to remote partners, does Nstreme2 backhaul receive on one channel and send any reply acknowledgements back through the transmit card only? Or is there a small amount of transmission on the recieve card also?

Thanks
Jon Langeler
Michwave Tech.

Rx on one card and Tx on the other card.

Radio acks happen on both channels if I’m not mistaken. Both MT and StarOS are “only” quasi-full-duplex.

George

Nstreme2 TX wireless only transmits and rRXcard only receivs, the same for the acks.

I just saw Butch Evans respond to my same question on the isp list:

"At the IP layer, it is true FDX. However, NStreme (and NStreme dual) is based on 802.11 protocol. There is some protocol information that is needed to maintain each individual link that is not happening at full duplex. This is a very small amount of traffic, but is happening, nonetheless. Butch Evans "

I’m not convinced of a solid answer yet, so who is right?
Thanks
-Jon

There is no tx on rx card. Acks for data transmitted over tx card are embedded into data received over rx card and do not add any overhead.

I’d take my cues from the ones that actually designed the product.. :wink:

So then it operates at layer 1?

I suppose I was incorrect in my assumptions.