Chorus says the Commerce Commission has a large degree of discretion in setting the final price for services over copper wires.
The telephone lines company is reiterating its argument that it should be able to continue charging wholesalers about $45 per customer for copper wire services.
The corporate regulator has already ruled that from 1 December, Chorus must cut its prices for those services to $33.44.
However, the commission is having another look at the pricing issue and will make its final decision by 1 April next year.
A number of the telecommunications retailers are arguing the $33.44 price is still too high.
Chorus' corporate affairs manager, Ian Bonnar, said the company was working to ensure its shareholders understood the various options open to the commission on pricing.