| 摘要 |
<p>A method for selecting clock source in Synchronization Digital Hierarchy (SDH) network and a clock board are provided in the present invention. The method includes: a clock information message is generated based on the quality information of the clock in SDH, and the clock board of every network element in said SDH independently selects clock source by using said clock information message. The method and clock board for selecting clock source in SDH provided in the present invention enable automatic reverse and recovery for clock source, effectively resolve the problem of clock looping, and adequately maintain the compatibility with the current system without increasing the cost of the system.</p> |
