The debate about who should provide consumers with accurate speed information heated up on Thursday, with NBN Co chief executive Bill Morrow saying his company was "not the police".

Mr Morrow has been reported as saying that NBN was "considering" releasing speed estimates if the retail service providers did not, in light of the consumer watchdog cracking down on misleading claims being made by telecommunications companies to customers.

But he was less clear on Thursday about when or if this data would be released, warning it could create consumer confusion.

Appearing before the Senate Environment and Communications Legislation Committee, Mr Morrow said NBN had undertaken a lot of studies about the "mass confusion" that existed about the services being provided.