There is a feature in the "Wireless Setup" that doesn't exist in my 2630L but exists in both my 2332L and 5222LB1:
...when selecting an SSID a line shows up called "Signal" and what I have figured out to be a score (higher is better and not RSSI). This allows me to know which router\AP to connect it to (not the same SSID).
It's also useful in testing the signal quality that you are getting.
Also, that line should be better explained so people understand whether it's a score of 1-100 or not. Also it should always be visible on your current SSID instead of having to select the SSID again to see it.
Thanks,