You may temporarily set up the antenna close to a computer for configuration, before mounting it. To get the antenna running, connect power to the RJ-45 wedge, a cable from the wedge's "Data out" to the antenna, and a cable from "Data in" to a router. You can use straight-thru Cat5/Cat5e/Cat6 cables. Make sure the cables are well-seated.

This tutorial will help you to configure a pair of antenna routers for bridging function, which allows internet access from across buildings.
On a computer connected to the same router as the first antenna router (close to the internet source):
Go to "Start->Run" and type in "cmd". Click "ok"
Type in "ipconfig" and press enter.
Write down the IP address, subnet, and gateway numbers. Label this "original pc address".
Go to Control Panel->Network Connections, right click on "Local Area" and select "Properties.
Highlight "Internet Protocol" and click "Properties".
Write down whether it is on "Obtain an IP address automatically", or if numbers have been entered manually. If entered manually, make a note of the DNS server addresses.

Then, select "Use the following IP address".

Set the IP address to match the IP address of this 1st antenna (printed on its box) except the last 3 digits. For the last 3 digits of the IP address, select a unique number. Here, we have selected 192.168.1.200 because the antenna router's IP ends with 250. 200 is also not used by any other device on our network.

Set Subnet to 255.255.255.0

Set the Gateway to use the same numbers as the antenna router for the first 3 sets of digits, and "1" for the last digit. Click "OK"
Using a web browser, type in the address of the antenna router as printed on the side of the product box. In our case, it is 192.168.1.250
Log in with no name, and password "admin"
If you can't log in, press and hold the hardware reset button on the antenna router (for 40 seconds) and allow it to restart.
Go to Wireless->Wireless Mode, select "Wireless Bridge", and then enter the MAC address of the other antenna router (printed on that router's box).
Then, scroll down within the top portion and click "Apply"

For the bottom portion:
If both antennas support 5.8GHz, you can enable Wireless-A only.
If both antennas support 2.4GHz, you can enable Wireless-B/G only.

After setting these, click "Apply" along the bottom of the browser window, and wait 25 seconds.
Go to "Settings"->"Static IP" on the antenna router

Change the IP address to match that of the original computer settings, except for the last 3 digits. Make the last 3 digits unique. Choose a number not used by other devices on the network.
Write down this new IP addresss and label it.

Set the subnet mask and gateway numbers to match that of the PC's original settings.

Click "Apply". The antenna router will not be accessible at this point; continue to the next step.
On the computer, go to "Control Panel->Network Connections", right click on "Local Area" and select "Properties", and get the properties of "Internet Protocol".
Set the computer's network settings to the original ones. You should now be able to log into the 1st antenna router using its new IP address.

To set up the 2nd antenna, the procedure will be almost the same. On a computer connected to the same network as the 2nd antenna, perform the settings the same way as the 1st, but note the following differences: (1) Enter the mac address of the 1st router into the 2nd one, (2) change the network addresses of the 2nd antenna to match that of the 1st antenna (except for the last digit of the IP). Any computer getting internet from the 2nd antenna may need to adjust their network address settings to match that of the antenna if they are not already using "Obtain IP address automatically".
If you are having problems at short ranges, try adjusting the transmission speed downward, or decreasing the power output under advanced wireless settings.
Signal strength is weak. How do I improve signal strength?
You can adjust the transmission rate under advanced wireless settings. Try using a slower settings. Also try adjusting the transmission power up or down.