So, Where can a person find the Antenna Gain (dB): ?I have a 5.2dBi Ceiling Mount OMNIDIRECTIONAL antenna part #: AIR-ANT1728. What is the Gain? I'm trying to enter the setting on a AIR-AP1231G-A-K9 (12.2(15)JA) for a WLSE 2.7.1 but, I'm not sure w...