The initiative, funded as part of the government's $125.8 cyber safety plan, will impose mandatory ISP-level Internet content filtering nation-wide, and will block Web pages detailed in two blacklists operated by the Australian Communications and Media Authority (ACMA).
iiNet chief regulatory officer Stephen Dalby said it will take part in the trial, despite its objections to the plan.
"We are very keen to participate in it, but we do not support the notion of ISP-level filtering," Dalby said.
"The best way to get the facts is to work on the inside.
"If the technology delivers unacceptable false positives or slows down speeds, we will gladly publish the details."