Bridge 802.11g very slow.....

[leofac]

Hello! :confused:
I have a branch office linked through a bridge. In the midle of the way, there is a 14-floor-building, where is the repeater.
In the total of equipments, i have:
- 4 Planet WAP-4000 802.11g (2 bridges), 4 antennas grid 24db, 1 3COM 50ports Switch at the main office, and 1 3Com OC 8 ports in the branch office.
The distance beteween the main office (GPS) and the repeater is 0.12 miles, but this link works very well.
The second link is the problematic. There are 1.87 miles between the two antennas (without barriers) and the link is very slow. It works slowly in the most parts of time, but works (ping with 1024bytes have 10% of time out and 45ms).. Howhever, several times it almost stops (ping 1024 have 30% to 100% of time out and 350ms).
I use the utility "iperf" for link perfomance test, and it varies from 300 Kbits/s to 750 Kbits/s. As my link is 802.11g, I think I would have 54 Mbits/s, or at least 11 Mbits. The most wap settings are default, and I use the channel 6. I already changed to all channels, without success.

Thanks for all, and sorry about my English. I´m from Brazil and I don´t know the English language yet. A big hug!:D

[M/Q]

You mention 4 devices, are you using two devices at the bridge location?

[leofac]

Yes M/Q. There are two devices at the bridge location, linked with a cross-over cable. The signal until ther third wap is very good. The problem is the comunication from 3th to 4th and 4th to 3th. (1.87 miles).

Thanks.

Leonardo.

[M/Q]

Good for you, as in my opinion that is the correct way to set it up. Are you using different channels on each of the links? If so are they sufficiently separated so as to not interfere with each other? Have you tried different channels or ran an RF spectrum analysis along the troublesome link?

Also at what height is the the remote location as the bridge link is 14 stories up. Do you have that antenna pointed down toward the remote site unless it is at the same height?