These are the technical characteristics and methods of measurement for mobile stations, for the Pan European Personal Communication System standardized by the ETSI Technical Committee Special Mobile Group (SMG). In this I-ETS a DCS 1800 Mobile Station can be: - a vehicle mounted station; - a transportable station; - a handheld station; - a vehicle mounted/transportable station; - a vehicle mounted/handheld station. This I-ETS covers the minimum characteristics considered necessary in order to provide sufficient equipment performance for mobile station equipment in the DCS 1800 system and to prevent interference to other services or to other users and to GSM and DCS 1800 PLMNs. Where the 900 MHz service is referred to in sections of GSM 11.10 not included in this document then this shall be considered as the 1800 MHz service. This I-ETS does not necessarily include all the characteristics which may be required by a user, nor does it necessarily represent the optimum performance achievable. This I-ETS applies to the public land mobile radio telephone service in the DCS 1800 system, using constant envelope modulation and operating on radio frequencies in the 1800 MHz band with a channel separation of 200 kHz and carrying 8 full rate traffic channels or 16 half rate channels per carrier according to the TDMA principle.