04 May, 2018
Most of the service interruptions were occurring in NSW, but there are also issues in Victoria, South Australia, WA and Tasmania.
"We are deeply sorry for the interruptions".
Queensland seems to be now receiving emergency calls without issue.
Telstra has confirmed that it is now undertaking fibre repairs near Orange, New South Wales, to bring Triple Zero emergency services back up.
A cable damaged by fire in regional New South Wales has downed some of Telstra's mobile services and Triple Zero in at least four states today.More news: Instagram and WhatsApp will launch a new feature
If you need to contact emergency services and are unable to get through on the 000 line, police media advise calling 131 444 and you will be patched through to the appropriate service.
Emergency calls to the Western Australian police are reportedly going through, but there have been some reports of issues in calling St Johns Ambulance.
Other states have similar arrangements, but Queensland was not affected by the disruption.
But businesses and customers alike have since taken to Twitter to share their frustration after some of the nation's biggest banks, who use Telstra as a supplier, were also impacted.
Telstra said it became aware of that issue with its NBN and 4G networks about 1pm, and by 4pm a company spokesman said the problem had been fixed.
The telco blamed technical changes ahead of upgrades to mobile traffic control equipment in the telco's Exhibition Street exchange in Melbourne for the outage.