Duc,
I havent used the 1400s. Have not got a chance so far to play with it, because most of my customers prefer 802.11g 1300 bridges. Both the bridges are similar in configuration, except for channels, power and a few other settings.
The 1400s come in two flavours. Mostly if you have clear line of sight, which you will have to determine by performing a site survey. 2,3 kilometers, you can either use telescopes, or GPS to align the antennas to determine the optimum settings.
In the prewious post I had link to Outdoor bridge range calculation utility. If you use the bridge with integrated antennas, and use a cable (coax) of 150foot (max) with 6db loss per 100 foot, and the radio power set to 125mw on either ends, the max range you are going to get is 3.2 miles. You have to option to get more range by stepping up the power.
Required antenna height says 20 feet above OBSTRUCTIONS.
If you use the 1400 with external antenna connectors, you have different choices for the antennas you can use. With this bridge and 2 dish antennas at either ends, and all other settings as described above you can go upto 10 miles.
I would suggest either one of the above as a good choice as antennas. (either integrated one, or external dish)
Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus
