System and method for communicating power system information through a radio frequency device

摘要

A method of communicating between a radio interface unit (400) and a portable terminal (102) is disclosed. The radio interface unit has a radio for communicating with the portable terminal by transmitting and receiving radio frequency signals therebetween. The method comprises the steps of the radio interface unit and the portable terminal having compact communication format for communications therebetween; the radio interface unit and the portable terminal having an extended communication format for communications therebetween; and the radio interface unit and the portable terminal using the compact communications format as a default communications mode.