As one of the major solutions for IP traffic on the Internet backbone network, the new technology-IP directly transmission over SDH(IP over SDH) is obtained vast attention in recent years.

• 光同步数字传输网上直接传送IP技术 (IPOverSDH)是近年来出现的新技术 ,作为Internet对主干网解决方案之一受到了人们的广泛关注。