The ongoing rollout of BT fibre broadband will boost the download capabilities of Plusnet's home phone and internet subscribers.
As a BT wholesale customer, Plusnet stands to benefit from continuing investment in the incumbent telecoms provider's national network infrastructure.
BT is investing £2.5 billion upgrading its network to support super- and ultra-fast download speeds, giving wholesale users the opportunity to launch their own fibre products.
In a post on the Plusnet blog, Martyn Hudson explained that Plusnet fibre is based on BT's fibre-to-the-cabinet (FTTC) technology, which currently boasts speeds of up to 38Mb.
"We are also running trials of Openreach's 80Mb FTTC and 330Mb FTTP services," he explained.
Mr Hudson was commenting after BT announced the locations of the next 98 telephone exchanges to be upgraded using fibre-optic cables.
The latest batch will see 800,000 more homes and businesses gain access to super-fast download speeds before the end of 2013.
Some of these households may choose to sign up for a BT broadband deal, but others may opt for Plusnet or another wholesale customer.
Plusnet's up to 38Mb fibre broadband deals - delivered via BT's network - are priced from £16.49 per month.
Fibre Broadband & Calls - the most affordable package - offers a 40GB monthly usage allowance, evening and weekend calls, a free wireless broadband router and a free activation worth £50.
Plusnet Fibre Broadband & Anytime Calls costs £19.99 per month, with Plusnet Extra Fibre Broadband & Calls priced at £21.49 and the Anytime Fibre Broadband & Anytime Calls costing £24.99.