A read-write TruthValue indicating whether the radio system is using a diversity antenna to receive transmissions when true, or relying on a single antenna for both transmit and receive when false. This setting tells the device, and any management application, whether to expect and interpret the separate diversity-antenna receive-power statistics elsewhere in the MIB, or whether those would be meaningless on a single-antenna setup. For example, on a site where only one antenna was actually installed, an admin would set p2mpDiversityAntennaPresent to false so the device does not attempt to report or alarm on a nonexistent diversity antenna's receive power.