I need information about setting up an Aironet AP 1240. It seems that the configuration at RF setting does not seem to be at its peak. We use only the protocols 802.11 b\g and the speed is at 54 Mbps. My question is, what configuration should be used to provide the highest possible coverage? I am aware that the various metallic structures that make up the building structure detrimental to the efficient propagation of waves but even directly under the access point I just receive a signal whose signal\noise is -25dbm.