British telecoms firm BT together with French global telecommunications firm Alcatel-Lucent have successfully achieved the ‘fastest ever’ broadband speeds during a test, demonstrating a ‘stable, error-free operation’.

During the joint test carried out on a 255 mile link connecting the BT Tower in central London and Ipswich, both firms claim achieving speeds of about 1.4 terabits per second, which is adequate to transmit 44 uncompressed HD films within a second.

BT Chief Network Architect Neil McRae said the achievement facilitates BT to introduce new features and technologies across its core network bolster the efficiency of existing infrastructure.

"Working with Alcatel-Lucent on this trial has been highly productive in demonstrating the viability of an alien wavelength approach," McRae said

The trial involved increasing the density of transmission channels on new ‘flexible grid’ infrastructure (Flexgrid) that allowed achieving up to 42.5% more data transmission efficiency than existing standard networks.

Alcatel-Lucent UK & Ireland CEO Cormac Whelan said BT and Alcatel-Lucent continue to work together to use innovation from Bell Labs, Alcatel-Lucent and BT Research and Development to move the industry forward and meet the ever evolving needs of the marketplace.

"These trials represent another step forwards by BT and Alcatel-Lucent in this continual evolution," Whelan said.