| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical transmission system capable of performing pass management identical to the conventional practice without issuing an unexpected alarm even in the case of the mixed presence of one-to-one type paths and one-to-N type paths. <P>SOLUTION: Where an integrated monitoring and controlling unit is to control an optical signal branching and inserting unit so as to cause transmit signals from the optical transmitting and receiving part of a first optical node to be received by the optical transmitting and receiving part of plural different optical nodes, this purpose can be achieved by an optical transmission system provided with an alarm inhibiting means that can inhibit the optical transmitting and receiving part, which is a source of transmission, from issuing any unexpected alarm. <P>COPYRIGHT: (C)2009,JPO&INPIT |
