| 摘要 |
A communicating apparatus having a plurality of ports to connect a plurality of communication lines comprises a memory to store information indicating whether the plurality of communication lines are extensions of a private branch network or not, a designating circuit to designate whether the communication is to be executed through said extensions or not, and a selector to select one of the plurality of ports in accordance with the result of the designation of the designating circuit and the contents of the memory. The memory stores information indicating whether the communication lines are ISDN lines or PSTN lines. The selector includes a call generating circuit for generating a call in the G4 facsimile mode when the selected communication line is an ISDN line and for generating a call in the G3 facsimile mode when it is decided that the partner is not a G4 facsimile apparatus after completion of the call generation.
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