| 摘要 |
A communication apparatus is provided for communicating with an external device. The communication apparatus may be a facsimile machine which includes a main phone, and a plurality of secondary handsets capable of communicating with the external device via the main phone. The main phone includes an identification data storage for storing identification data of the external device in a manner such that the identification data is linked to one of the secondary handsets, an identification data detector for detecting the identification data of the external device, an identification data registration checker for determining whether or not the detected identification data is registered in the identification data storage, and a calling sound generation command issuer for causing only one of the secondary handsets to ring when the detected identification data is registered in the identification data storage.
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