After a week of horror for the telco, Optus has been forced to apologise for yet another outage which left customers unable to reach emergency services – the second such failure in less than two weeks.

The latest disruption occurred on Sunday between 3am and 12.20pm, affecting around 4500 customers in the Illawarra suburb of Dapto.

Nine triple-zero calls failed to connect during the blackout. The fault has been traced to one of the Singtel-owned company’s 9000 mobile phone towers.

One caller in need of an ambulance had to borrow another phone to reach paramedics, while another was unable to get through but has since been confirmed safe.

NSW Police carried out welfare checks on four others, with all found unharmed. Two additional calls were accidental.

An Optus spokesperson confirmed t

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