Throughput 1400

[rkeblusek]

I have a few customers inside of 8 miles with bridges. We have excellent signal. We are seeing throughput in the area of 19Mbps. We are told this is good. TAC has said 54Mbps is the radio speed and maximum speed "duplexed" is 27Mbps. I thought 802.11a would be duplexed. The data sheet indicates aggregate throughput in the area of 28Mbps network dependant. On many sites I read that you can expect 33% to 50% actual throughput based on overhead which makes sense. Aren't the devices duplexed out of the box? How do we determine throughput including overhead exactly? My customers believe the product is miss represented based on this duplex comment since most transport voice over the connection as well and the data sheet makes no mention of duplex versus non-duplexed speeds.

[dixho]

You are correct that 802.11a, 802.11b, and 802.11g are all half duplex protocol.

Every frames sent by a bridge requires an acknowledgment from the other side of the bridge. The further apart between the two bridges, more time is required to transmit the acknowledges. Thus, the throughput is lower.

In order to determine the overhead, you need a wireless sniffer.