Values.GsmNmrObjSourceGSM object for network measurement reports.
type nonrec t = {bsic : BSIC.t;GSM base station identity code (BSIC).
*)bcch : BCCH.t;GSM broadcast control channel.
*)rxLevel : RxLevel.t option;Rx level, which is the received signal power, measured in dBm (decibel-milliwatts).
*)globalIdentity : GlobalIdentity.t option;Global identity information of the GSM object.
*)}