The study -- Fixed Broadband and Voice Report -- found that NBN Co fibre is set to be used by 4.2 million homes in 2017. If the opposition is elected, fibre may only be used by 700,000 customers at that time.

Malcolm Turnbull, the opposition's communications and broadband spokesperson, recently .

"By the end of 2015, NBN Co fibre will match the penetration of DSL with about three million active connections to homes and businesses if the rollout is uninterrupted," reads Telsyte's report.

Telsyte director of research consulting, Chris Coughlan, said in a statement that the firm considered the current political environment and the Coalition's opposition to NBN Co when compiling the report.

"If the NBN Co is allowed to continue by the federal government, optical fibre connections will connect some 4.2 million premises by the end of 2017," he said.