BT and Huawei have achieved speeds of 2TBps on a commercial fibre link between London and Dublin.
The 727km core network link used optical superchannel technology provided by the China-based vendor.
The trial demonstrated the successful operation of real-time 64GBaud flexible-rate transponders, which run at twice the electrical speed of current core optical network optical signals, for the first time.
In a separate trial, the two companies said they had achieved speeds of 5.6TBps on a trial network between BT Labs in Adastral Park and the BT Tower in London.
This beat the previous fastest speed of 3TBps set in 2014.
The increase is thanks to increasing the spectral efficiency of a single strand of glass.
Howard Watson (pictured), CEO of BT Technology, Service & Operations, said: “BT scientists built the first commercial single mode optical fibre link back in 1984 and the BT Labs remain at the forefront of photonics research more than thirty years later.
“The core network is the superhighway of the internet. It’s important that our core networks keep pace with the growth in bandwidth demands driven by take-up of high-speed fibre broadband, HD content, 4G smartphones and tablets and in the future, 5G services.
“These landmark trials show that we can easily turn up the dial to deliver the speeds needed in our core networks to stay well ahead of rising customer demand.”
Zha Jun, President of Huawei’s Fixed Network Product Line, added: “We have been working [with BT] for over 10 years and this project marks a big step forward in our efforts to build future-ready core networks for our customers.”