Is bluetooth signal strength field work or not?

First, My NXT's firmware version is 1.05.(retail version)

There is a field named "Bluetooth Signal Strength" in return package of the "GetDeviceInfo" command.

I guess, It tells the strength of bluetooth radio that received NXT brick.

But it is always return 0 even NXT is very next to laptop side.

Is the field unuse?


NXTelectroneer