or alert on the presence of proxies. Both filtered and unfiltered users will be surveyed as part of the trial. ISPs participating in the Live Trial will be required to enter into a non-disclosure agreement with ACMA. 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. At the end of 2008, Stephen Conroy anticipated that the live trial would test the filtering of BitTorrent traffic, but in March 2009 he stated that the proposed filters would not be effective on peer-to-peer traffic. The trial was originally scheduled to be commenced in December 2008, but, after the existence of a report critical of the trial became known, the trial was pushed back. On 11 February 2009 a new filtering trial was announced, initially with the ISPs iPrimus Telecommunications, Tech 2U, Webshield, OMNIconnect, Netforce and Highway 1. Testing with each ISP will take place for at least six weeks once filtering equipment has been obtained and installed, and iPrimus expects the trial to begin in late April or early May with five or ten thousand participants. The trial will be opt-in, with ISPs asking for volunteers, although all WebShield customers already receive a filtered service. None of the top three ISPs, Telstra, Optus and iiNet, have been included in the trial, although both iiNet and Optus did expect to be involved at a later time. iiNet withdrew itself from consideration for the trial in March 2009, with Michael Malone giving as reasons the media storm around the leaked blocklist, the changing nature of policy, and "confused" explanations of the trial's purpose. In July 2009, some results from the trials began to emerge. Five of the nine participating ISPs reported minimal speed or technical problems associated with the trials. Some ISPs reported that thousands of their members had voluntarily participated in the trials; others, that less than 1% had participated, and that this was not a