A telephone exchange apparatus includes a memory which stores a plurality of resource information for executing mutually different plural communication service functions, a recorder which records communication signals for processing in the each resource information, on a recording medium, a processor which processes the communication signals based on the corresponding resource information stored in the memory, and a controller which controls to manage the communication signals on the recording medium by each resource, and releases the corresponding resource area on the recording medium according to the communication service function requesting to release.