Optus boss Stephen Rue is under pressure over the telco's triple-zero network failures. Photo: Mick Tsikas/AAP PHOTOS

The heads of Australia's major telecommunications providers have filed into parliament for a dressing down from the communications minister over the integrity of the triple-zero network.

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Embattled Optus chief executive Stephen Rue was steeling himself for a grilling over how the company allowed two emergency call outages to occur last month, one of which resulted in hundreds of failed calls and was linked to three deaths.

"Just looking forward to meeting the ministe

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