At the 43rd session of the World Optical Fiber Communication Conference (OFC 2018) in 2018, Zhang Chengliang, deputy dean of China Telecom Beijing Research Institute, was invited to make a keynote speech (plenary Speech) as the first special guest from China industry in the OFC conference, and stood at the most important podium of the world's top optical communications conference. , making a sound from China. The OFC conference, held every March, is the highest level and largest event recognized by the academia and industry of optical communication in the world, representing the wind vane of global optical communication academic research and industrial development, which has been registered for nearly 15000 participants this year.

The report quickly received wide attention from the global industry, lightreading and other professional media to report the first time, triggering hot debate.

Global communications is ushered in a strong wave of digital transformation, Zhang Chengliang in combination with the development of China's ICT and Internet, described the CTNET2025 network reconfiguration strategy that China Telecom is carrying out, elaborated the CTNET2025 framework under China Telecom's future optical network industry development thinking and suggestions. The biggest aspect of the report is China Telecom's all-optical network strategy. The first is the access field of all Optical Network 1.0 strategy has been achieved in 2017 to achieve the target, China Telecom fiber access and hundred trillion households in the proportion of more than 90%.

Zhang Chengliang further pointed out that the development of the future access network mainly from the video and smart home, China Telecom will continue to promote all optical network 1.0+ strategy, the 2025 is expected to provide a full range of gigabit to broadband and intelligent implementation. At the same time, China Telecom in the backbone of the transport sector has launched a full Optical Network 2.0 strategy, relying on ROADM equipment, 100g/super 100G coherent technology, Wson and a jump to all optical architecture to achieve wavelength-level scheduling, minute-level business release, second-level recovery and millisecond delay.

Zhang Chengliang mentioned that China Telecom's recent deployment of the Yangtze River in the middle and lower reaches of the intelligent Roadm Network is all Optical Network 2.0 strategic implementation of the key step, but also to provide a practical reference for the whole industry. Facing the impact of 5G and cloud, Zhang Chengliang expounds the M3C-OTN strategy of metropolitan Area Optical Network. As the world's largest LTE FDD operator in the 4G era, China Telecom will continue to lead the industry in the 5G era, he said. The three m in M3c-otn is represented by multiple services (Multi-Service), Mobile hosting optimization (mobile-optimized) and metropolitan Area Network (Metro), C for Network Cloud (Cloud), and the target is based on optical network technology,

For the fixed and mobile broadband services and high-quality enterprises and enterprises to provide the best cost-effective integrated load-carrying plan. Zhang Chengliang finally stressed that the optical network industry is now in a period of significant change, China Telecom attaches great importance to the sustainable development of optical network technology. All-Optical Network 1.0, all-optical Network 2.0, M3c-otn and other strategies at different network level to promote the optical communication and optical network technology innovation and scale deployment. China Telecom will be open to join hands with the world's Optical network industry partners, together to build a more efficient, agile and green intelligent global Internet.