Electromagnetic compatibility and Radio spectrum Matters (ERM); Harmonized EN for the GSM onboard aircraft system covering the essential requirementsof Article 3.2 of the R&TTE Directive
The present document applies to a system comprising the following radio equipment types:1) an Onboard GSM Base Transceiver System (OBTS) supporting the GSM 1800 functions with specificprotocols for power constraints;2) a Network Control Unit (NCU) preventing direct connection of the onboard mobile terminals with mobilenetworks on the ground by raising the noise floor in the cabin.