Telekom Austria said it had reached speeds of 10GBps on a copper cable as it looks to boost the performance of its broadband network.
The operator carried out a trial using Nokia’s XG-Fast technology in Vienna last week.
Telekom Austria is looking at using the tech as part of a FTTB rollout targeting apartment blocks.
Sascha Zabransky, Director Group Technology & Future Services at Telekom Austria Group, said: "In urban areas in particular, demand for ultra-high-speed broadband services with data transmission rates in excess of 100 MBps is growing faster than an area-wide high-speed fibre optic infrastructure can be completed.
“We remain faithful to our long-term vision to bring fibre-optic lines to every home - however, until then, XG-FAST will serve as a smart bridging technology.”
Earlier this week, Nokia revealed it was working with Facebook to boost the capacity of submarine cables under the Atlantic Ocean.
The two companies trialled new probabilistic constellation shaping technology (PCS) on a 5500km cable between New York and Ireland.
They said the transmission capacity of the system improved by 2.5 times.
The record spectral efficiency of 7.46 b/s/Hz indicates that the capacity of the cable could be upgraded to 32TBps per fibre in the future, they added.
Dr Stephen Grubb, Global Optical Network Architect at Facebook, said: "Facebook wants to increase the pace of innovation and adoption of next-generation optical technologies.
"This field trial with Nokia demonstrates that the scalable optical technology of PCS together with narrow linewidth laser sources can achieve capacities extremely close to the Shannon limit.”
The Shannon limit is the theoretical maximum rate at which information can be transmitted over a communications channel.