Calypso Wireless (fka CLYW)

[Lurker202]

In my experience, No manufacturers do not.
Consumer based wifi systems have theoretical maximums usually about 300' for 802.11g 2.4ghz. This is also running at a lower data rate than 54mb..
Running at 54mb you get about 100' unobstructed. It can be a lot less with other variables. And 802.11a 5gz distances are shorter respectively.

But some of the commercial AP's I use have external antenna connections. I can add some pretty powerful antenna's to these AP's. Thus the distances can increase dramatically. Point to point wifi links can be extended for miles.

In most cases it is more about the clients uplink power than the AP's downlink power. With the right antenna, you can get usable downlink signal strength over distances greater than 500'. But that doesn't mean the client can reach back to the AP.

I have tested usable wifi connectivity to my phone at distances over 500'.
There are many variables. Signal strength can decrease around -10dbi just by placing your body between the client and the AP.

Remember as the signal weakens, the AP will lower the data rate in order to maintain a solid connection. At around -75bdi the connection is tenuous. At around -80dbi you still have a connection but no real bandwidth.

AP's can be configured to ignore clients that cannot connect at a minimum basic data rate. This equates to a minimum signal strength but its actual value may fluctuate due to overlapping channel interference and the noise floor. This is a type of connection QOS.
There is also client roaming aggressiveness. This is a parameter that affects how quickly a client will jump to another AP or SSID if the signal strength/quality is greater. Most laptop wifi adapters can change this factor.
I do not know of any smartphone that has an adjustment for RA.
Phones are known to be what is called "Sticky" meaning their RA is low. They tend to hold on to whatever network they are on until the last possible second. Whether this is a good thing or not really depends on the situation.

This is just my experience. Others will most likely vary.