code: def cipheringModeCommand():
      
      a = TpPd(pd=0x6)
      b = MessageType(mesType=0x35)  # 00110101
      c = RrCause()
   #d=cipherModeSetting()
   #e=cipherResponse()
   # FIX
      d = CipherModeSettingAndcipherResponse()
      packet = a / b / c / d
      return packet
docs: CIPHERING MODE COMMAND  Section 9.1.9