A 2027 U.S.–China conflict with Australia aligned to the U.S. China trade stops immediately, Taiwan exports are slowed/limited, and China launches large-scale cyber disruption in waves. This is a planning scenario, not a forecast. Planning scenario, not a forecast. No end date is set.
Australia is not a cable-franchise market. The National Broadband Network is the primary wholesale network for fixed-line voice and data, and customers buy retail plans from retail service providers. Mobile service is three national operators. Telstra, Optus and TPG Telecom own and operate the majority of mobile network infrastructure. As of June 2025, Telstra was the largest mobile provider, followed by Optus and then TPG Telecom.
The installed fixed base is already connected. It connected services to around 8.63 million homes and businesses as of June 2025. NBN Co reported that more than 8.63 million premises are connected, and total revenue was 5.7 billion dollars. Residential ARPU was 50 dollars per month. Service on that installed network continues. The war shock is new premises gear, handsets, fibre upgrades, and a cyber wave against carrier and wholesale systems.
Mobile concentration is the retail fact. The 3 national mobile network operators and their sub-brands held a collective market share of 87 percent, while challenger brands reached a combined market share of 13 percent. There were 30.4 million prepaid and postpaid mobile plans. Together the three operators accounted for 26.6 million of those services. The remaining base was 3.8 million services from resellers that are not sub-brands.
The short-horizon analog is hours and a monthly price, not a year-over-year peak. The Optus outage continued for approximately 12 hours. The flagship low-range advertised price was 49 dollars a month, and the flagship low-range monthly price was up 8.9 percent from June 2024 to June 2025. NBN Co increased average wholesale pricing by 4.08 percent for 2024-25.
5G vendor policy on the pages opened is an extrajudicial-direction test, not a named-vendor schedule. The May 2025 guidance says measures are vendor and country agnostic and that there is no list of vendors or countries to which the guidance applies. The 23 August 2018 guidance uses the same extrajudicial-direction test and does not name Huawei or ZTE. A named Huawei ban is not stated here because it is not on those pages.
A China trade stop does not, on any page opened here, remove the premises already connected. The NBN carried 11.6 million terabytes in the three months to June 2025, inside about 13.6 million terabytes downloaded across retail broadband. Mobile services carried 1.5 million terabytes. The traffic is on the installed network.
The fibre upgrade is the part that needs new lead-ins. Fibre-to-the-premises connections grew from 2.165 million to 2.665 million. More than 430,000 premises were upgraded from copper to fibre-to-the-premises in the year, and 31 percent or 2.66 million connected premises were on fibre-to-the-premises. An origin country for that fibre gear was not in the release.
A Taiwan share of Australian handset or network-equipment imports is unpublished. The public trade preview that was queried returned no partner rows, so no Taiwan customs line is stated for Australia. Other Asia, nes is not used as a substitute. U.S. import shares are not copied in as if they were Australian imports.
The week-1 domestic failure is a core outage. The Optus outage commenced around 4am on 8 November 2023, continued for approximately 12 hours, and services were restored by 4pm. It affected Optus fixed phone, internet, and mobile services and the resellers of that network. The investigation describes self-isolation of core network routers. The redacted report does not print the router count.
The same class of target is named in the advisory that lists Australia among the places the activity has been observed. Actors focus on large backbone routers of major telecommunications providers and on provider-edge and customer-edge routers, and the activity has run since at least 2021. Australian Signals Directorate's Australian Cyber Security Centre is an authoring agency. This paragraph does not repeat exploit steps.
The national incident count is broader than telecommunications. In 2025-26, critical-infrastructure incidents accounted for 10 percent of all incidents. The Australian Cyber Security Centre responded to 154 critical-infrastructure incidents, a decrease of almost 7 percent from the previous year. That 154 is all critical infrastructure, not a telecommunications-only victim count.
Short-horizon outage analog: the outage continued for approximately 12 hours. It started around 4am and services were restored by 4pm the same day. This is not a year-over-year price peak.
Short-horizon price analog: the flagship low-range advertised price was 49 dollars a month, and residential ARPU was 50 dollars per month. Those are monthly prices. The 8.9 percent and 4.08 percent changes are not the figures used in this band.
Upgrade-pace analog: more than 430,000 premises moved from copper to fibre-to-the-premises over the reported year, and fibre-to-the-premises connections reached 2.665 million. A gear stop shows up as a slower upgrade. No printed lead time in weeks is available to convert that pace into a delay.
Full-year price analog: the flagship low-range monthly price was up 8.9 percent, and NBN Co increased average wholesale pricing by 4.08 percent. Telstra's entry-level post-paid price rose 7.7 percent. These are June-to-June or full-year changes, kept out of the 0-3 month band.
Wave 1 is the wholesale fixed network, the three mobile cores, and customer-premises routers. Radio sites, retail service providers, and emergency calling are Wave 1 indirect because they stop when those systems stop. The outage analog continued for approximately 12 hours. The advisory names backbone and customer-edge routers and lists Australia. This ordering is a planning model.
Wave 2 is the fibre upgrade purchase. More than 430,000 premises were upgraded in the year. A Taiwan or China stop on lead-in gear slows premises not yet upgraded and does not, by itself, disconnect the installed base. The origin share is unpublished. This ordering is a planning inference.
Wave 3 is the distributed edge of the retail market: handset channels and MVNO resellers. Resellers are 3.8 million services and a combined market share of 13 percent. They fail when the host fails, which is indirect. Handset origin is unpublished. The domestic cyber count beside this model is 154 critical-infrastructure incidents, not a store-level loss figure. This ordering is a planning inference.
origin sharepercent
collective market share of 87 percent
ACCC communications market reportcombined market share of 13 percent
ACCC communications market reportcalculated share was 35.2 percent
ACCC NBN wholesale indicatorsoutage hourshours
continued for approximately 12 hours
ACMA Optus investigationprice changepercent
up 8.9 percent
ACCC communications market reportby 4.08 percent
ACCC communications market reportrose 7.7 percent
ACCC communications market reportendpointsmillion
30.4 million prepaid
ACMA telecommunications trendsaccounted for 26.6 million
ACMA telecommunications trends8.63 million homes
ACMA telecommunications trends3.8 million services
ACMA telecommunications trendsnbn servicesservices
3,107,874 services
ACCC NBN wholesale indicators1,055,888 services
ACCC NBN wholesale indicators662,674 services
ACCC NBN wholesale indicatorssitessites
26,246 fourth-generation sites
ACMA telecommunications trends15,119 fifth-generation sites
ACMA telecommunications trendsmonthly pricedollars per month
50 dollars per month
NBN Co49 dollars
ACCC communications market reportfinancial levelbillion dollars
5.7 billion
NBN CoPut NBN wholesale systems and the three mobile cores on the week-1 watch. The outage analog continued for approximately 12 hours and took fixed phone, internet, and mobile together, including resellers.
Confirm which retail providers sit on which wholesale seeker. Telstra had 3,107,874 services in operation. A failure of the wholesale handoff is a multi-provider event because customers buy only through retail providers.
Separate the service price from a gear shortage. Residential ARPU was 50 dollars per month. The flagship low-range advertised price was 49 dollars a month. Do not treat the annual 8.9 percent flagship move as a week-1 price spike.
Ask vendors for the extrajudicial-direction assessment the guidance requires. There is no list of vendors or countries. Do not substitute a named-vendor ban that the opened pages do not contain.
Rank fibre lead-in orders against the upgrade pace of more than 430,000 premises in the year. Record that the Taiwan or China share of that gear is unpublished. Do not import a foreign customs share into the Australian plan.
Keep challenger retail on its own line. The combined market share of 13 percent and the 3.8 million non-sub-brand services still ride the host networks. They are not a fourth radio network.
National mobile or fixed core, hours down. Act when a national mobile or fixed outage lasts more than 12 hours. Twelve hours is the Optus restoration time. This 12-hour line is a planning line. The investigation report does not publish it as a covenant.
Flagship low-range mobile price, percent change. Act when the flagship low-range monthly price rises by more than 8.9 percent versus the prior June. The 8.9 percent figure is the June 2024 to June 2025 print. This line is a planning line. The ACCC does not publish 8.9 percent as a cap.
NBN residential ARPU, dollar change. Act when residential ARPU rises by more than 3 dollars in a year from the 50 dollar level. The 3 dollar rise is the printed FY25 change. This line is a planning line. NBN Co does not publish 3 dollars as a covenant ceiling.
Telstra NBN services in operation. Act when Telstra services in operation fall below 3,107,874. That count is the June 2026 row. This line is a planning line at the latest observed level. The ACCC table does not publish 3,107,874 as a minimum.
Staff the wholesale handoff for a multi-hour outage using the 12-hour analog.
Keep residential ARPU of 50 dollars per month on the continuing bill for the connected base of more than 8.63 million premises.
Separate fibre lead-in orders from the installed base. The upgrade pace is more than 430,000 premises in the year.
Isolate core routers from the failure mode in the Optus investigation.
Treat the 26,246 fourth-generation sites as still in service unless the core is down.
Notify resellers. The outage included them, and the non-sub-brand base is 3.8 million services.
Map which wholesale seeker carries the customer. Aussie Broadband had 1,055,888 services in operation.
Do not assume a second physical network. Challengers hold a combined market share of 13 percent on host radios and on NBN access.
Haircut service cash only when hours down exceed the 12-hour planning line.
Do not book a Taiwan handset or fibre share. The partner table was empty.
Run 5G vendor questions through the extrajudicial-direction test. There is no vendor list on the opened guidance.
National carrier outage, hours down The analog continued for approximately 12 hours and covered fixed phone, internet, and mobile, plus resellers. Hours down is the week-1 service signal.
Flagship low-range mobile price, dollars a month The June 2025 level was 49 dollars and the flagship low-range monthly price was up 8.9 percent. A new advertisement above that path is the retail price signal.
NBN residential ARPU, dollars per month Residential ARPU was 50 dollars per month after a rise of 3 dollars. It is the wholesale residential price signal.
NBN services in operation by access seeker The June 2026 row is the book. Telstra had 3,107,874 services in operation. Aussie Broadband had 1,055,888 services in operation. Other access seekers had 662,674 services in operation. The calculated Telstra share was 35.2 percent of the 8,817,314 row sum.
Mobile plans and radio sites There were 30.4 million prepaid and postpaid mobile plans. The three operators accounted for 26.6 million. Sites in service are 26,246 fourth-generation sites and 15,119 fifth-generation sites.
Critical-infrastructure incidents responded to The centre responded to 154 critical-infrastructure incidents, 10 percent of all incidents. Use it as the national cyber-operations signal, and do not relabel it as a telecommunications victim count.
Observed baselines are the ACMA trends report, the ACCC market report, the June quarter 2026 wholesale table, the NBN Co results release, the Optus investigation, the 5G guidance and its 2018 predecessor, the ACSC landscape, and the router advisory. Scenario inferences are the wave order and any claim that a 2027 outage matches the 12-hour analog.
Decision-changing limit. The unpublished primary is an Australian customs line, by partner, for handsets or network equipment. The public trade preview returned no partner rows. No Taiwan share and no China share are stated for Australian imports. U.S. customs shares are not copied across. A named Huawei or ZTE ban is not on the guidance pages that were opened. Operator mobile-site totals were not in the infrastructure-report text, so the ACMA totals of 26,246 and 15,119 are used instead.
comtradeplus.un.orgcisc.gov.auweb.archive.orgaccc.gov.auacma.gov.au
Calculated figures use printed inputs and are labeled. The June 2026 row sum of 8,817,314 services adds Telstra 3,107,874, TPG 1,525,760, Optus 1,082,894, Aussie Broadband 1,055,888, Superloop 747,840, Vocus 634,384, and other 662,674. The Telstra share of 35.2 percent is 3,107,874 divided by 8,817,314. No other share on that row is stated. The 3 dollar ARPU rise is the company print, and the move from 47 dollars to 50 dollars is the ACCC print of the same wholesale residential price.
The 200 organisations across 80 countries line is the Salt Typhoon description on the Australian landscape page, not an Australian victim count. The 154 incidents cover critical infrastructure as a whole. The Optus outage is a router-failure analog, not a finding that the 2023 event was a PRC campaign. The 34.5 million mobile-services figure includes more than the 30.4 million prepaid and postpaid plans and is not added to them.
| Node | Primary impact | Time horizon | Cyber wave | Evidence |
|---|---|---|---|---|
| NBN wholesale fixed network | The wholesale fixed network is the national handoff for voice and data, and a direct hit on its systems stops retail providers that do not own the access plant. | 0-3 months | Wave 1 (direct) | ACMA trends; NBN Co results; CISA advisory |
| Telstra, Optus, and TPG mobile carriers | The three national mobile carriers are the direct week-1 target set, and the installed radio network keeps serving customers unless core routers fail. | 0-3 months | Wave 1 (direct) | ACCC market report; ACMA mobile counts; Optus investigation |
| Radio access sites | Fourth-generation and fifth-generation sites stay on the air, and they drop sessions only when the carrier core that serves them fails. | 0-3 months | Wave 1 (indirect) | ACMA site totals; Optus investigation |
| Retail service providers | Retail providers that buy NBN services lose the wholesale input when the NBN handoff fails, even if their own shops are untouched. | 0-3 months | Wave 1 (indirect) | ACMA wholesale description; ACCC services-in-operation table |
| Customer-premises routers | Premises routers are in the same direct target class as customer-edge routers, and new router supply is the trade question the opened Australian customs line does not answer. | 0-3 months | Wave 1 (direct) | CISA advisory; 5G security guidance; trade preview |
| Fibre-to-the-premises upgrades | The fibre upgrade program needs new lead-ins, and a Taiwan or China stop on fiber gear would slow premises that are not yet upgraded. | 1-6 months | Wave 2 (indirect) | NBN Co results; trade preview |
| Handset retail | Handset replenishment is the trade exposure, and no opened Australian customs table names Taiwan or China as the origin. | 0-6 months | Wave 3 (indirect) | ACMA mobile plans; ACCC prices; trade preview |
| MVNO resellers | Resellers that do not own the radio network lose service when the host carrier's core fails, which is a later dependence on the three national networks. | 0-3 months | Wave 3 (indirect) | ACMA reseller count; ACCC market share; Optus investigation |
| Emergency calling on the mobile network | A core outage blocks ordinary calls and emergency calls together, on the pattern of the national Optus outage. | 0-3 months | Wave 1 (indirect) | ACMA Optus investigation; CISA advisory |