Victoria's regional rail network has ground to a halt for a second consecutive day, with V/Line morning peak services remaining suspended following a nationwide Telstra telecommunications outage that first struck the network on Wednesday. Commuters across regional Victoria have been warned to avoid V/Line services entirely, with only very limited replacement bus coaches available and the operator urging passengers to find alternative transport wherever possible.
"We acknowledge this has been inconvenient to many people and thank passengers for their patience as work continues to safely restore services," a V/Line spokesperson said in a statement.
Why V/Line Trains Are Still Offline
The root cause of the crisis was a software defect that triggered time synchronisation failures across Telstra's national network. While Telstra announced it had identified and resolved that primary fault by 4pm on Wednesday, trains did not return to service overnight — and remain off the tracks into Thursday morning.
The reason, according to V/Line chief executive William Tieppo, lies in how the trains themselves communicate. Each V/Line train relies on a SIM card to connect with the broader rail network, and those SIM cards were knocked offline by the Telstra disruption. The Australian Rail Track Corporation (ARTC), which oversees the infrastructure, advised V/Line that ongoing reliability concerns with Telstra's network meant it was not yet safe to resume operations.
"That's predominantly a contract that's between the Australian Rail Track Corporation and Telstra, and we obviously get that service through ARTC and Telstra," Mr Tieppo explained.
The vulnerability was compounded by a relatively recent infrastructure decision: V/Line migrated its essential train communication services to Telstra's 4G network in 2024, following the national shutdown of the 3G network. That move, while necessary given the retirement of legacy technology, left the regional rail system entirely dependent on a single commercial telecommunications provider — with no backup in place when that provider failed.
Commuters waiting at train stations on Wednesday evening faced hours-long delays for replacement coaches, which were themselves affected by the telecommunications outage.
Calls for a National Backup System
Mr Tieppo acknowledged the outage had exposed a significant gap in resilience planning and said V/Line was already in discussions with ARTC about a longer-term backup solution. He stressed, however, that any such system would need to be designed at a national level.
"The backup system is obviously one that will be looked at at a national level, not only just for Victoria," he said.
Mr Tieppo also noted that V/Line is still in the midst of a broader technology transition — moving from analogue systems, copper wire and traditional infrastructure toward fibre and cloud-based platforms. He framed the outage as an unavoidable growing pain of that shift.
"As the world moves to a new technology, we have to move to it; otherwise we've got assets that won't be able to function anymore," he said.
Notably, Melbourne's Metro Trains network was unaffected by the outage because it operates on a different radio communications system to V/Line.
Experts Warn of Systemic Vulnerability
Transport engineering experts say the V/Line crisis is symptomatic of a deeper problem facing ageing infrastructure networks as they are incrementally upgraded rather than redesigned from the ground up.
Monash University transport engineering professor Hai Vu said systems built on older technology and then piecemeal updated tend to accumulate fragility over time.
"Over time, the system has been built on a certain technology, and then, after that, it's been incrementally updated rather than thinking from the system and design perspective to make it more resilient," Professor Vu said.
He pointed out that the geographic scale of regional rail networks made redundancy far harder to achieve than in urban metro systems, which can more readily use physical cable connections to fill gaps. The Metro system's relative resilience, he said, was also partly a reflection of it being a newer build overall.
Despite the risks, Professor Vu said there was no realistic path back to analogue systems — the challenge now was designing the digital transition to be more robust. The initial Telstra outage that shut down Victoria's entire regional train network has made that conversation urgent.
Broader Fallout From the Telstra Outage
The disruption to V/Line services was just one consequence of Wednesday's nationwide Telstra failure. The outage also compromised hundreds of triple-zero emergency calls across the country, prompting welfare checks on dozens of customers who could not be reached after failed emergency call attempts. Telstra's chief financial officer conceded the telco had "let customers down" and that the scale of triple-zero failures was greater than initially understood.
The full scope of the network failure and its impact on emergency services is detailed in our earlier coverage of the Telstra outage triple-zero crisis and welfare checks.
For V/Line passengers, the immediate priority remains practical: the operator is advising all travellers to check for service updates before attempting to travel and to make alternative arrangements for Thursday's commute where at all possible.
