The Commerce Commission is considering regulating part of the telecommunications market.
The commission is investigating the charges telecommunications companies bill each other for finishing calls on each others' networks, called mobile termination rates.
But the industry is polarised about what the outcome should be. Telecom and Vodafone say they will not gradually reduce termination rates, as planned, if the commission regulates.
It's the commission's third attempt to regulate the area.
Telecom chief executive Paul Reynolds says the company thought the matter had been resolved some time ago and the industry needs some certainty.
NZ Communications is building the country's third mobile network.
Chief executive Mike Reynolds believes the charges between carriers for ending calls on each other's networks should be dropped.
The Telecommunications Users Association says the matter needs to be resolved promptly.
Chief executive Ernie Newman says the companies that collect the most revenue from calls ending on their networks are the incumbents, and a new entrant would be disadvantaged.