A Senate committee hears bombshell testimony about Optus's processes during an outage that led to the deaths of multiple customers who were unable to call Triple Zero.

The head of Optus has accepted a "culture of carelessness" was entrenched at the telco, leading to a series of failures which have been linked to two deaths.

SYDNEY (Reuters) -Optus's CEO will need more time to get its house in order, the boss of parent Singapore Telecommunications said on Tuesday, after back-to-back emergency call outages in Australia ...