Abstract: A method for computing maximum traffic capacitance of a base station using a virtual call in the digital mobile communication system in such a way that an operator at operating terminal for Base Station Manager (BSM) inputs call-set-request instructions using the virtual call to maintain and repair the digital mobile communication system so that traffic state is set between mobile stations in the service area of test base station and a vocoder of a Base Station Controller (BSC) to compute maximum traffic capacitance of the test base station. An operator at operation terminal inputs call set information by operator instruction as much as mobile station numbers to be tested to compute maximum traffic capacitance of the base station. The BSM inputs a virtual call-set-request-instruction by means of a virtual call-set-start-flag.

Abstract: The present invention provides a flash memory device wherein memory cells in each of the memory cell blocks are divided into a plurality of memory cell groups. In each memory cell group, local bit lines are laid out connected by segmentation transistors. When selecting a memory cell, only a local bit line connected to a memory cell selected by an operation of the segmentation transistor is coupled to a global bit line so that the load to be applied to the bit lines is minimized during the read out operation.