Showing off its optical networking prowess, ZTE has completed a test that managed speeds at 400Gbps over a distance of more than 5,000 kilometers, or about 3,100 miles.
The growth of data volumes and speeds in both fixed and wireless networks have consequences for all parts of operator networks, including long distance links that are used to connect cities, countries and continents. For users to get the most out their mobile or fiber broadband subscriptions, networks have to keep up.
While a growing number of operators are upgrading to 100Gbps-links, vendors such as ZTE are preparing for the next step. The company’s 400Gbps test was conducted on a WDM (Wavelength-Division Multiplexing) system using single-mode fiber, which is what is currently used for data transmissions over long distances, said Magnus Isaksson, ZTE CTO in the Nordic countries.
Today, fiber networks use either single-mode or multi-mode cables. The latter allows vendors to build cheaper equipment, but isn’t very good at transporting data over long distances, according to Isaksson.