FIELD: code-division multipleaccess radio telephone systems. SUBSTANCE: before logging in inactivity mode with low power consumption radiophone computes in advance timing required for invoking separate radiophone units in radio telephone system and stores computed invocation time moments in registers. In addition local timing of radiophone is synchronized before logging in inactivity mode with specified limits of pseudorandom noise sweep from radiotelephone system. During inactivity mode radiophone uses inactivity mode timer for modeling system timing. When inactivity mode timer coincides with stored invocation time moments, radiophone re-invokes chosen radiophone units and radio-frequency unit of input stage for quitting inactivity mode and acquiring synchronism with communication system. This also makes it possible to quit inactivity mode earlier, for instance to service interrupts, while maintaining system timing. EFFECT: reduced power requirement of radiophone. 10 cl, 7 dwg
