宽带ATM技术《宽带通信网课件-CH1》 - 图文

信元传输方式与接口?ATM Forum 传输接口基于SDH、纯信元、PDH、FDDI （Fiber Distributed Data Interface)?基于光纤的155.52Mb/s(SDH方式)?基于屏蔽双绞线的155.52Mb/s ( STP:Shielded Twisted pair) (SDH方式)?基于非屏蔽双绞线的25.6Mb/s (UTP:Unshielded TP) (基于信元－－信元就是传输帧)2013-7-29ftp:219.245.73.1, Name: bcn,Password:2012292. SDH传输接口(以STM-1为例)931261RSOHAU-PTRMSOHH45下一级结构体或信元、分组的起始位臵AU Payload area承载的结构体VC-42013-7-29ftp:219.245.73.1, Name: bcn,Password:201230NENENENERS RS RSMSRS:Relay Section MS:Multiplexing Section NE: Network ElementRSOH:Relay Section Overhead实现STM-1帧同步和再生段管理功能MSOH:Multiplexing SectionOverhead实现端到端的管理功能（见下页）2013-7-29ftp:219.245.73.1, Name: bcn,Password:201231AU-PTR:Administration Unit Pointer指出承载的结构体(VC-4/ Virtual Container/虚容器)在（STM-1）载荷区的起始位置（允许VC-4数据滑动）MSOH:Multiplexing Section Overhead实现复用段管理功能(性能监测、故障处理、操作维护信道、自动保护切换（APS：Automatic Protection Switching) 等2013-7-29ftp:219.245.73.1, Name: bcn,Password:201232