| 摘要 |
There is disclosed an ATM layer device configured to realize the function of an ATM layer by selecting one from a plurality of physical layer devices realizing the function of a physical layer, and executing a transfer of a cell, which is a unit of transmission, between the ATM layer device and the selected physical layer device. Priority information indicating the previously set priority level of each of said plurality of physical layer devices is held, and the physical layer device which should execute the cell transfer is selected in a predetermined order in accordance with the priority information. Thus, drops in cell transmission rate and receiving buffer overflows in the physical layer device are eliminated.
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