Communications from Senator Conroy's office have indicated that the live trial will occur without the participation of any customers due to concerns about the impact on network performance of filtering 10,000 URLs. Telstra and Internode have stated that they will not take part in the trial. iiNet has stated that it will take part in the trial only to show that the filtering will not work. Optus has stated that it will only test a heavily cut-down filtering model containing only 1,300 URLs in a limited geographic area, and customers will be allowed to opt out.