code: def rrInitialisationRequest():
      
      a = TpPd(pd=0x6)
      b = MessageType(mesType=0x3c)  # 00111100
      c = CiphKeySeqNrAndMacModeAndChannelCodingRequest()
      e = MobileStationClassmark2()
      f = Tlli()
      g = ChannelRequestDescription()
      h = GprsMeasurementResults()
      packet = a / b / c / e / f / g / h
      return packet
docs: RR Initialisation Request Section 9.1.28.a