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.

PTN supports a variety of two-way connection-based point-of-channel packet-switched services, with a business suit various size particles, end to end networking capability, providing a "flexible" transmission pipeline is more suitable for IP service feature; extensive protection available, encounter a network failure can be achieved 50ms protection switching based carrier-class services to achieve transport-level business protection and restoration; inherited the operation, administration and maintenance of SDH technology mechanism (OAM), with a perfect OAM system point to point connections to ensure network with protection switching, error detection and channel monitoring capability; completion of interconnection and IP / MPLS variety of ways, seamless bearing core IP services; network management system can control the connection establishment and set up a channel to achieve business differentiation and QoS Guaranteed flexible SLA provide other advantages.

In addition, it may be using a variety of underlying transport channel (e.g. SDH / Ethernet / OTN). In short, it has the perfect OAM mechanism, accurate fault location and isolation strictly business, management and maximize the use of fiber resources to ensure the safety of operations, after binding GMPLS, can be automatically configured and mesh network resources high survivability.