摘要
Packet Transport Networks （PTN） combine the advantages of packet technology and Synchronous Digital Hierarchy （SDH） technologyl Taking the packet switch as its core, PTN has a high statistical multiplexing ability, which allows it to become a more efficient packet transfer service. Its strong Operation Administration and Maintenance （OAM）--similar to SDH and carrier-class security protection services--ensures efficient mobile backhaul business management ahd transmission quality. MPLS Transport Profile （MPLS-TP） packet transport network eliminates connectionless features, such as Penultimate Hop Popping （PHP）, labet merge and Equal＇cost multi-path （ECMP）, and is enhanced in terms of OAM, protection, and synchronization. This is ideally suited for carrying IP-based mobile backhaul services and key account services. PTN, original Multi-Service Transport Platform （MSTP）, Metro Ethernet, and IP over Wave Division Multiplexing （WDM）/Optical Transport Network （OTN） of organic complexes, contribute to an ＂all IP＂ era of telecommunications services.
Packet Transport Networks （PTN） combine the advantages of packet technology and Synchronous Digital Hierarchy （SDH） technologyl Taking the packet switch as its core, PTN has a high statistical multiplexing ability, which allows it to become a more efficient packet transfer service. Its strong Operation Administration and Maintenance （OAM）--similar to SDH and carrier-class security protection services--ensures efficient mobile backhaul business management ahd transmission quality. MPLS Transport Profile （MPLS-TP） packet transport network eliminates connectionless features, such as Penultimate Hop Popping （PHP）, labet merge and Equal＇cost multi-path （ECMP）, and is enhanced in terms of OAM, protection, and synchronization. This is ideally suited for carrying IP-based mobile backhaul services and key account services. PTN, original Multi-Service Transport Platform （MSTP）, Metro Ethernet, and IP over Wave Division Multiplexing （WDM）/Optical Transport Network （OTN） of organic complexes, contribute to an ＂all IP＂ era of telecommunications services.
