Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Terrestrial Flight Telecommunications System (TFTS); Ground to Air Calling from GSM (V1.2.1)
"The present document defines the technical requirements necessary to implement the inter-working between Terrestrial Flight Telecommunications System (TFTS) and Global System for Mobile Communications (GSM) digital cellular communication networks. This inter-working will enable users of GSM mobile phones to place and receive calls by roaming on the TFTS network@ using terminals provided on-board the aircraft. The initial services supported by the present document are speech calls and ground-to-air short message service (SMS). The specification may evolve to support fax@ data and packet data services for GSM. The specification may also be developed to support the interconnection of TFTS with other network systems. xThe end-to-end system specification is based on functionality specified within ETS 300 326. The specification defines the application of this functionality and details supplementary information required on existing ARINC 746 specifications. A new TFTS GSS to Gateway Location Register interface is specified. The initial scope and title of the present document is ""Ground to Air Calling from GSM"". The TS also details air to ground services@ for both voice and SMS and provides an overview of how such a service can be implemented. The exact implementation of air to ground services is currently outside the scope of the present document."