| 摘要 |
A communication apparatus having a one-way speakerphone function including a handset connected to the communication apparatus by a transmit-receive line, wherein the transmit-receive line is enabled when the handset of the communication apparatus is off-hook; a speaker outputting a sound of the handset communication; an input key part including a selection key for the one-way speakerphone function and a plurality of dial keys; and a central control device controlling the one-way speakerphone function; wherein a conversation signal is transmitted through the speaker when the handset is off-hook, the one-way speakerphone function selection key signal is input, and it is determined that a dialing is completed .
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