FAX TRANSMITTING AND RECEIVING DEVICE, CONTROL METHOD FOR FAX TRANSMISSION AND RECEPTION, AND CONTROL PROGRAM

To improve failure resistance of a FAX transmitting and receiving device having a plurality of processing functions.SOLUTION: A FAX transmitting and receiving device has: a transmitting and receiving unit that transmits and receives data with respect to a communication circuit; a data processing unit that performs processing on the data received by the transmitting and receiving unit by using one of a plurality of processing functions to generate processing data and stores the data in a storage unit; a test control unit that sequentially inputs, to the data processing unit, test data of each of the plurality of processing functions stored in the storage unit; a failure diagnosis unit that individually compares the pieces of processing data sequentially generated by the data processing unit based on the test data with expectation value data stored in the storage unit, and determines whether each of the plurality of processing functions normally operates based on results of the comparison; and a function selection unit that selects one of the processing functions determined to normally operate by the failure diagnosis unit as a processing function of the data received by the transmitting and receiving unit.SELECTED DRAWING: Figure 1 【課題】複数の処理機能を有するＦＡＸ送受信装置の故障耐性を向上する。【解決手段】ＦＡＸ送受信装置は、通信回線に対してデータを送受信する送受信部と、送受信部が受信したデータを複数の処理機能のいずれかを使用して処理することで処理データを生成して記憶部に記憶させるデータ処理部と、記憶部に記憶された複数の処理機能毎のテストデータをデータ処理部に順次入力するテスト制御部と、テストデータに基づいてデータ処理部が順次生成する処理データを、記憶部に記憶された期待値データとそれぞれ比較し、比較結果に基づいて複数の処理機能の各々が正常に動作するか否かを判定する故障診断部と、故障診断部が正常に動作すると判定した処理機能のいずれかを、送受信部が受信するデータの処理機能として選択する機能選択部と、を有する。【選択図】図１