T-MPLS (Transport MPLS) is a connection-oriented packet transport technology. In the transport network, the client signal is mapped into the MPLS frame and use MPLS mechanisms (such as label switching, the label stack) forwards, while it increases the basic functions of the transport layer, such as connectivity and performance monitoring, survivability (protection and restoration), management and control plane (ASON/GMPLS).

OTN's intelligent optical network will provide the ideal solution for the transmission of large-granule broadband services. Inter provincial transport network main trunk transport network, provincial trunk transport network, metro (local) transport network structure, while the Metro (local) transport network can be further divided into the core layer, convergence layer and access layer. SDH relative terms, the biggest advantage of OTN technology is to provide scheduling and delivery of large particles of bandwidth, therefore, at different levels whether to adopt OTN network technology, depending on the size of the primary particles dispatch service bandwidth. According to the network situation, primarily particles inter-provincial trunk transmission network, the province trunk transport network and metropolitan area (local) transport network core layer of scheduling is generally Gb / s and above, therefore, these levels can be given priority and scalability advantages OTN technology to build better. For Metro (local) transport network convergence and access layer, when major scheduling particles reach Gb / s order of priority can also be constructed using OTN technology.

PTN (Packet Transport Network) refers to an optical transport network architecture and specific technologies: IP traffic between the optical transmission medium and the underlying set a level for which the packet of bursty traffic statistical multiplexing and transmission requirements Designed to packet core business and supports multiple service provider, has a lower total cost of ownership (TCO), while inheriting traditional advantages of optical transmission, including high availability and reliability, efficient bandwidth management mechanisms and traffic engineering, convenient The OAM and network management, scalable, high security.