Plusnet is seeking further participants for its ongoing 80Mb fibre-to-the-cabinet (FTTC) broadband trial.
The Sheffield-based broadband provider launched its ultra-fast broadband pilot in January, with around 100 employees and customers now taking part.
But the firm is seeking additional trialists as it seeks to hone its fibre offering, prior to a full commercial launch.
"We opened the trial up to all residential FTTC customers last month in the forum but still have plenty of spaces open on the trial for more customers to take part if they want to," explained Dave Tomlinson of the Plusnet Product Team.
"Like all other DSL technologies, 80/20 is a distance dependant technology, but as it's a fibre to the cabinet product it's the distance between property and cabinet that matters rather than property and exchange."
He said the pilot is open to anyone that currently has FTTC and is on the Value Fibre or Extra Fibre broadband deals.
It is free to participate, up until the launch of Plusnet 80Mb broadband - meaning consumers are only required to pay their normal monthly bill.
"At the end of the trial people on the trial will be able to move to whatever 80Mb product we launch and pay whatever the fee is for that product, or switch back to the up to 40Mb product for free and continue to pay the same as today," Mr Tomlinson said.
"We have a limited number of routers available for testing, these are free and yours to keep regardless of whether you stay on 80Mb or not at the end of the trial."
In order to join the pilot scheme, subscribers need to visit the firm's trials website, read through the terms and conditions and contact Plusnet if they are interested.
"If you have any questions then the best place to ask is in trial forum," Mr Tomlinson added.
"We should stress that this is a trial and things can go wrong and may take longer than normal to fix."