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AAP
AAP
Kat Wong

MYSTERIOUS: Optus chief to face senate grilling over lengthy outage | Mind Blowing Facts

Optus CEO Kelly Bayer Rosmarin has been taken to task before a Senate committee. (Mick Tsikas/AAP PHOTOS)

Hundreds of Australians were unable to make emergency calls during the Optus outage and the telco still doesn't know why.

Optus boss Kelly Bayer Rosmarin has revealed 228 calls to triple-zero failed to go through during a 12-hour outage that affected internet and phone services to millions of customers on November 8.

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