公开(公告)号：US06721502B1

公开(公告)日：2004-04-13

申请号：US09675733

申请日：2000-09-30

申请人： Daniel Y. Al-Salameh ,  Donald L. Husa ,  David S. Levy ,  Timothy O. Murphy ,  Gaylord W. Richards

发明人： Daniel Y. Al-Salameh ,  Donald L. Husa ,  David S. Levy ,  Timothy O. Murphy ,  Gaylord W. Richards

IPC分类号： G02F100

CPC分类号： H04J14/0227 ,  H04J14/0241 ,  H04J14/0283 ,  H04J14/0294 ,  H04J14/0295

摘要： An optical transmission system formed from a plurality of nodes interconnected in a ring configuration via at least two transmission media provides protection capacity for each optical channel. If a channel signal does not meet predetermined criteria, then a loss of signal indication is declared for the channel and one of a plurality of protection switching states is invoked to re-route service traffic carried by the impaired channel to its destination via corresponding protection capacity. The switching states include particular transmission states and at least “keep-alive” and “protection access” states.

摘要翻译： 由通过至少两个传输介质以环形配置互连的多个节点形成的光传输系统为每个光信道提供保护容量。 如果信道信号不符合预定标准，则声明信道丢失信号，并且调用多个保护倒换状态中的一个保护切换状态，以通过相应的保护容量将受损信道携带的业务业务重新路由到其目的地 。 切换状态包括特定的传输状态和至少“保持活动”和“保护访问”状态。