Digital trunked systems (PMR: Private Mobile Radio and PAMR: Public Access Mobile Radio) were developed for private and public users who have specific requirements regarding operating functions and security. Trunked systems differ from public GSM or UMTS systems in that they are able to rapidly establish a connection, enable group calling, priority calling, end-to-end encryption and offer the possibility of a direct connection between two mobile stations without the need for an intermediate base station (direct mode).

Last modification 27.01.2016

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