| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for the duplex configuration of a device by presetting an external frame mode for performing processing based on a frame clock and an internal frame mode for internally performing processing based on data included in coded data into a voice CODEC, and switching two frame modes corresponding to whether the frame clock is externally inputted or not. SOLUTION: A voice CODEC 4 at a voice transmitter α1 has the external frame mode for performing coding and decoding based on a frame clock Cf supplied from a communication line β to a frame clock input terminal 6d and the internal frame mode for internally performing coding and decoding based on the frame clock based on the prescribed data included in received data Dr inputted from the communication line β through a received data input terminal 6b. Corresponding to a frame synchronism setting value, an external/internal frame switching control part 52 controls the switching of the frame mode to be functioned at the voice CODEC 4. |
