| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To attain a self-monitoring using an FPM cell in a transmission quality monitoring apparatus for monitoring transmission quality of an ATM transmission system. <P>SOLUTION: The transmission quality monitoring apparatus for the transmission apparatus of the ATM transmission system is provided with: a transmission quality monitoring and detecting part 1 including an FPM cell detecting part 11; and a transmission quality monitoring and inserting part 2 including an FPM cell inserting part 21, and provided with: selectors 14, 15, 24, 25 to be switched according to a self-monitoring control signal to transfer the FPM cell from the FPM cell inserting part 21 of the transmission quality monitoring and inserting part 2 to the FPM cell detecting part 11 of the transmission quality monitoring and detecting part 1 without sending it onto a transmission line. Then, the FPM cell is generated by using a self-monitoring cell from a self-monitoring cell generating part 29, and self-monitoring is performed by inputting the FPM cell to the transmission quality monitoring and detecting part 1. <P>COPYRIGHT: (C)2004,JPO</p> |
