Such material was incorrectly blocked by content filters inside the Parliament House network, which outraged senators who could not research portfolios relating to sex and guns.
Sources privy to the pilot's EOI documents say the trial will be restricted to 12Mbps -- a small fraction of ISP network connections -- which they say will undermine the final test results.
Critics made similar comments after the filtering technology was against a simulated load of 30 users. They said even the most accurate filter, which returned a 94 percent accuracy rating, would incorrectly block up to 10,000 Web pages out of 1 million.
The trial is expected to use a blacklist of 10,000 banned Web pages, using the rumoured 1300-page blacklist held by the ACMA mixed with dummy data.