China Telecom completed the industry's first 1,200km long-distance 800G/400G hybrid live network transmission verification

China Telecom successfully completed the single-wavelength 800G/400G mixed-rate transmission system test on the Nanjing-Shanghai live network G.652 optical fiber, achieving a maximum transmission capacity of 64Tbit/s and a longest transmission distance of more than 1,200 kilometers without power relay transmission. The technical feasibility of 800G/400G hybrid transmission is confirmed.

ICC News Recently, China Telecom Group Corporation organized the China Telecom Research Institute, together with partners such as Huawei, ZTE, FiberHome and Shanghai Nokia Bell, to successfully complete the single-wavelength 800G/400G hybrid rate on the Nanjing-Shanghai existing network G.652 optical fiber. The transmission system test achieved a maximum transmission capacity of 64Tbit/s and a maximum transmission distance of more than 1,200 kilometers without electric relay transmission, confirming the technical feasibility of 800G/400G hybrid transmission.

According to reports, this live network transmission test is based on China Telecom’s abundant trunk optical cable network and backbone hub in the Yangtze River Delta region. On the Nanjing-Shanghai-Nanjing live network G.652 optical fiber link, the partner’s new generation 800G and 400G transmission are used. The equipment, combined with the industry's advanced extended C-band and extended L-band broadband transmission technology, only uses EDFA optical amplification to achieve a maximum capacity of 64Tbit/s and a long-distance powerless relay transmission of more than 1,200 kilometers. This mixed rate live network transmission test fully confirmed that when implementing the "Eastern Data and West Computing" project to build a national integrated computing network and the high-quality development of computing infrastructure for high-traffic hotspot areas, 400Gbit/s QPSK full The introduction of 800Gbit/s channels into the optical backbone network enables the possibility of 800G/400G multi-rate mixed transmission, laying a solid theoretical foundation for further building a high-efficiency, highly reliable, and highly flexible all-optical network. In the future, China Telecom will continue to promote the development of next-generation all-optical network technology, fully research hybrid transmission at 400Gbit/s, 800Gbit/s and even 1.2Tbit/s rates based on application scenarios, networking requirements, and technical capabilities, and support general, intelligent and The scale development of super computing power.