| 摘要 |
A data communication apparatus capable of selecting either a method corresponding to a memory box or a method in accordance with ITU-T.33. The communication controls for a received sub-address signal include a usage method corresponding to a memory box and a usage method in accordance with ITU-T.33. The communication control for the received sub-address signal is selected by a selection button. In a case when a user selects the method of registering the sub-address signal and a communication type in association with a corresponding memory box and # is not registered as the sub-address signal, # is received as the information of the sub-address signal from a partner apparatus, a message of confirming the method of using the sub-address signal or changing the method to another method is displayed.
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