(PTN (packettransportnetwork) refers to such an optical transmission network architecture and specific technology: a layer is set between the IP service and the underlying optical transmission medium. It is designed for the burst of packet service traffic and the requirements of statistical multiplexing transmission. It takes the packet service as the core and supports the provision of multiple services. It has a lower total cost of use (TCO) and adheres to the traditional advantages of optical transmission, Including high availability and reliability, efficient bandwidth management mechanism and traffic engineering, convenient OAM and network management, scalability, high security, etc.)
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