Fibre Internet for Business in Australia: Dedicated vs Shared — What's the Difference?
Ask ten Australian business owners what type of internet connection they have, and most will say "fibre." A surprising number of them will be wrong — or at least, they will be describing the physical medium rather than the service they are actually receiving. "We have fibre" does not tell you whether that connection is fast, reliable, or fit for business use. Understanding the difference between dedicated and shared fibre is one of the most important things an Australian business decision-maker can do before renewing, upgrading, or troubleshooting their internet service.
"We Have Fibre" Does Not Mean What You Think
Glass fibre optic cables carry data as pulses of light. They are faster and more reliable than copper, less susceptible to interference, and can carry enormous amounts of data across long distances. That much is true of all fibre.
What varies enormously is what happens to that fibre once it reaches the network. The NBN's Fibre to the Premises (FTTP) technology uses glass fibre all the way to your building. A carrier-grade Enterprise Ethernet dedicated circuit also uses glass fibre all the way to your building. They share the same physical medium. But the performance characteristics, reliability guarantees, and price of those two services are so different that comparing them as if they were the same product would be like comparing a suburban bus route with a chartered private coach — both will get you somewhere, but the experience, reliability, and cost are not remotely comparable.
Before assuming your fibre connection is enterprise-grade, it is worth understanding how different NBN technology types are built and what they deliver for businesses. The technology type — FTTP, FTTB, FTTN, HFC — tells you something about the physical infrastructure. But the service model layered on top of that infrastructure is what determines the performance you actually experience day to day.
The core distinction is this: shared fibre means your connection competes for capacity with other customers. Dedicated fibre means your connection is yours alone. Everything else — the speed differences, the SLA differences, the price differences — flows from that single architectural fact.
Shared Fibre: NBN and Consumer-Grade Connections
The majority of Australian business internet connections are delivered over shared infrastructure. This includes virtually every NBN Business plan, regardless of the speed tier or the marketing language used to describe it.
"Shared" means the physical capacity connecting your premises to the carrier's network is divided among multiple customers. You are not receiving a lane of traffic reserved for your use. You are using a road that your neighbours, the business next door, and dozens or hundreds of other customers are also using at the same time. How much of that road you get depends on how busy it is.
The NBN's wholesale model makes this explicit. NBN Co sells capacity to retail providers through a mechanism called the CVC — the Connectivity Virtual Circuit. Retail providers purchase a pool of CVC capacity and distribute it across their customer base. When a retail provider buys more CVC than their customers collectively use, performance is good. When they buy less — to reduce their own costs — customers experience congestion. During peak periods, typically 9am to 5pm for business customers, the available capacity per connection can drop significantly below the plan's headline rate.
This congestion dynamic is the source of a great deal of business frustration with NBN performance. A customer on an NBN 500 plan who consistently gets 480 Mbps at 2am may get 120 Mbps at 10am on a Tuesday during a busy period. The infrastructure has not changed. The service model has simply reached the limits of shared capacity.
One important clarification: there is a genuine difference between NBN Business and NBN Residential services, but it is not the difference many businesses assume. NBN Business plans offer higher speed tiers, a contracted fault response window (NBN Co's restoration SLA), and freedom from the traffic shaping that NBN Co applies to residential connections during peak evening hours. What they do not offer is dedicated capacity. The underlying network architecture is the same. NBN Business is still a shared service — it is simply a more capable and better-supported version of one.
For a detailed comparison of what separates NBN Business from residential plans and where the real differences lie, the contention ratio is one of the most useful concepts to understand. How contention ratio affects business internet performance in Australia explains the mechanics behind shared capacity and why two businesses on identical NBN plans can experience very different real-world speeds.
Dedicated Fibre: How It Works
Dedicated fibre means exactly what the name implies. The capacity allocated to your premises is not shared with anyone else. From your premises to the carrier's core network, the bandwidth is reserved for you.
In Australia, dedicated fibre services are sold under several product names depending on the carrier. The most common terms are Enterprise Ethernet, Dedicated Internet Access (DIA), and Layer 2 point-to-point circuits. The underlying technology varies, but the defining characteristic is consistent: guaranteed, uncontended capacity from the access point to the network.
The practical implications of dedicated architecture are significant. Dedicated fibre services deliver symmetrical speeds — upload and download are identical, because the capacity is reserved in both directions equally. They come with bandwidth guarantees, not "up to" figures. SLAs include fault response windows measured in hours rather than business days, with 4-hour restoration commitments typically applying 24 hours a day, 7 days a week. And the major enterprise carriers — Telstra, Optus, TPG/AAPT, Vocus, and Macquarie Telecom — maintain dedicated fault management queues and proactive monitoring for enterprise services, so faults are often detected and investigated before the customer has noticed a problem.
Speed options on dedicated fibre circuits typically run from 10 Mbps to 10 Gbps, delivered in fixed increments. You contract for a specific speed and that speed is what you receive. There is no traffic management, no congestion-related degradation, and no peak-hour slowdown, because there is no competing traffic to create those conditions.
How Enterprise Ethernet and EFM work for Australian businesses covers the technical architecture and the major product types available in the Australian market in more detail.
Speed: Headline vs Actual
This is where the shared and dedicated models diverge most sharply in practice, and where the gap between marketing and reality is most pronounced.
On a shared NBN connection, the speed you see advertised is the theoretical maximum under ideal conditions. A 500/50 Mbps NBN Business plan can deliver 500 Mbps downloads and 50 Mbps uploads — when the network is uncongested, when your provider has purchased adequate CVC, and when the physical infrastructure between you and the exchange is performing well. During a busy period on a congested network, real-world speeds can fall substantially below those figures.
The upload figure on NBN plans deserves particular attention. Most NBN tiers are asymmetrical by design — the standard 500 plan offers 500 Mbps download and 50 Mbps upload. For many business workloads, the upload speed is the binding constraint. Video conferencing, cloud backups, large file transfers to clients, and hosted application traffic all consume upload bandwidth. A 50 Mbps upload shared across a 20-person office running simultaneous video calls will not deliver a satisfying experience.
Why upload speed matters as much as download speed for business internet explores this asymmetry in depth, including the specific business workflows where upload speed has the greatest operational impact.
On a dedicated fibre connection, the contracted speed is the delivered speed. A 100/100 Mbps dedicated service delivers 100 Mbps in both directions, consistently. Because the capacity is reserved and unshared, there is no mechanism for congestion to reduce performance. The headline speed and the real-world speed are, in practice, the same number.
This means that a business comparing a 500/50 Mbps NBN Business connection with a 100/100 Mbps dedicated fibre connection cannot simply compare the peak download figures. At 10am on a Tuesday, the dedicated 100 Mbps symmetrical service may deliver more practical, reliable throughput than the nominally higher-speed shared connection — particularly for upload-intensive workloads. For businesses where predictable, symmetrical performance matters, symmetrical internet connections for business in Australia explains why the symmetry characteristic of dedicated services is often more operationally significant than raw speed.
SLA Differences
Service Level Agreements are where the difference between shared and dedicated services becomes most consequential when things go wrong.
NBN Business connections come with NBN Co's Restoration SLA. Depending on the product tier, NBN Co commits to restoring a failed connection within 8 business hours (with some premium plans offering a 5-hour window). Several important qualifications apply to this commitment. It is a restoration time, not a response time — the clock measures time to resolution, not time to acknowledgement or investigation. It applies only during business hours on business days. A fault reported at 4pm on a Friday does not begin accumulating against the SLA until 9am on Monday morning. In practice, a Friday afternoon outage may not be resolved until Monday, with no SLA breach occurring.
The retail provider's SLA sits on top of NBN Co's. A retail provider may commit to their own response windows, but they are ultimately dependent on NBN Co's fault resolution process for the physical infrastructure layer. When a problem lies in the NBN network rather than the retailer's own equipment, the retailer cannot resolve it independently.
Dedicated fibre from enterprise carriers operates under a substantially different SLA model. Standard enterprise commitments include a 4-hour restoration SLA applying 24 hours a day, 7 days a week. Carriers maintain proactive monitoring on enterprise circuits — they detect faults through network monitoring before customers report them, and investigation begins without requiring a call from the customer. Enterprise fault queues are separate from consumer queues, meaning a fault on a dedicated circuit is not competing for attention with thousands of residential calls. And enterprise SLAs typically include financial penalties — SLA credits applied to future invoices — for missed response times, giving the carrier a direct financial incentive to meet the commitment.
For businesses where internet downtime has measurable operational cost — contact centres, financial services businesses, cloud-dependent operations, businesses running hosted telephony — the SLA difference between NBN Business and dedicated fibre can independently justify a significant portion of the price premium. A Monday morning resolution on a Friday fault is not acceptable when the business cannot operate without connectivity.
Cost Comparison
The cost difference between shared and dedicated fibre is substantial, and it is worth being direct about the figures rather than vague.
NBN Business connections in Australia are broadly available from around $80 to $100 per month for entry-level speed tiers, rising to $300 to $400 per month for top-tier plans with the fastest available speeds. Adding 4G failover — a router with a mobile data SIM that activates automatically if the primary NBN connection fails — typically adds $30 to $80 per month depending on the router and data allowance. A well-configured NBN Business plus 4G failover solution can be put together for well under $500 per month, and for most SMBs, this provides robust, resilient connectivity.
Dedicated fibre pricing is a different category entirely. Entry-level dedicated circuits — 10 Mbps or 20 Mbps symmetrical — typically start at $800 to $1,200 per month, and that is before installation costs, which can range from a few hundred dollars to several thousand depending on whether fibre infrastructure needs to be built to the premises. As speeds increase, so does the cost: 100 Mbps dedicated circuits typically run $1,500 to $3,000 per month, while 1 Gbps dedicated services can reach $5,000 to $8,000 per month depending on the carrier, the location, and whether new fibre build is required.
Location is a significant variable. Dedicated fibre is most cost-effective in capital city CBDs and major business precincts where infrastructure is already built and competition between carriers is strong. In suburban or regional locations, the cost of building fibre to a new premises can add tens of thousands of dollars in one-off costs, and the monthly recurring charge is typically higher due to less carrier competition.
The honest summary is this: dedicated fibre makes economic sense when the business's operational dependence on a reliable, consistent, symmetrical connection is high enough that the productivity cost of degraded or failed connectivity exceeds the price premium. Contact centres, financial services businesses, multi-site operations requiring private circuits, and cloud-hosted businesses with heavy upload requirements are the most common use cases. For the majority of Australian SMBs — 10 to 30 staff, standard office workloads, cloud-based SaaS applications — a top-tier NBN Business plan with 4G failover delivers excellent reliability at a fraction of the cost of dedicated fibre.
EFM: The Middle Ground
Between NBN Business and full dedicated fibre, there is an intermediate option worth knowing about: EFM, or Ethernet in the First Mile.
EFM works by bonding multiple copper telephone lines together to deliver a single, symmetrical, managed data service. Because the capacity is dedicated (not shared with other customers), and because it is delivered with an enterprise SLA including 4-hour fault restoration, it occupies a practical middle ground between the consumer-grade NBN and the full enterprise fibre model.
The trade-off is speed. EFM typically delivers between 2 Mbps and 30 Mbps symmetrical — more than adequate for businesses whose primary requirement is symmetry and SLA rather than raw throughput, but not suitable for businesses with high-bandwidth requirements. Pricing is generally in the $400 to $700 per month range, making it significantly cheaper than dedicated fibre while offering a stronger SLA than NBN.
EFM availability in Australia has been declining as the NBN fibre rollout expands, because NBN infrastructure makes the copper pairs EFM relies on increasingly redundant. In areas with strong NBN coverage, EFM is less relevant than it was five years ago. But in locations where dedicated fibre is not available and NBN performance is inadequate, EFM remains a viable option worth assessing.
How Enterprise Ethernet and EFM work for Australian businesses covers EFM availability and the assessment process in more detail.
How to Determine What Your Business Actually Has
Many business decision-makers inherit their internet connectivity from previous tenants, previous IT managers, or the building management office. It is surprisingly common to arrive at a new role and find no documentation that clearly identifies whether the connection is NBN, dedicated fibre, EFM, or something else entirely. Here is how to find out.
Start with your current contract and invoice. The product name will usually indicate the technology type. Terms like "NBN Business," "nbn," "FTTP," or "FTTN" indicate an NBN service. Terms like "Enterprise Ethernet," "Dedicated Internet Access," "DIA," "Layer 2," or the name of a major carrier followed by a circuit reference number typically indicate a dedicated or managed service.
Check the NBN Co address checker at nbn.com.au. Enter your business address and you will see the technology type available at that address — FTTP, FTTB, FTTN, or HFC, or confirmation that you are in a fibre-ready but not yet connected area. If the address returns an active NBN connection, the service using it is an NBN service, regardless of what the retail provider calls it.
Look at the SLA documentation for your current service. If it commits to symmetrical speeds and a 4-hour fault restoration window applying around the clock, it is likely a dedicated service. If it describes speeds as "up to" figures and references NBN Co's restoration commitments or business-day windows, it is an NBN service.
Look for physical equipment on site. An NBN connection will have an NTD (Network Termination Device) installed — a white box typically mounted on a wall, with an NBN serial number. A dedicated fibre connection typically terminates in a managed router provided by the carrier, often rack-mounted or installed in a comms room.
If none of this resolves the question, ask your provider directly. "Is this a dedicated or shared internet connection?" is a reasonable question, and the answer should be unambiguous. If your provider cannot give you a clear answer, that itself tells you something.
How Pickle Can Help
Understanding what connectivity you currently have and what the right option is for your business are two different problems. The first is a technical question with a factual answer. The second depends on your team size, your workloads, your budget, your location, and how much operational impact a connectivity failure would cause.
Pickle helps Australian businesses work through both. For most SMBs, the right answer is an NBN Business connection at an appropriate speed tier, combined with 4G failover for resilience — a combination that delivers reliable, business-grade connectivity at a cost that makes sense for the majority of organisations. For businesses whose use case warrants a dedicated fibre assessment, Pickle can evaluate what is available at your address, which carriers serve it, and what the realistic cost and performance comparison looks like.
If you are unsure what you have, unsure what you need, or simply want a clear assessment of your options, call Pickle on 1300 688 588 or email [email protected].
Frequently Asked Questions
Q: Is NBN a dedicated or shared internet connection?
A: NBN is a shared internet connection. Whether your premises is connected via FTTP, FTTB, FTTN, or HFC technology, the NBN service delivered over that infrastructure uses shared capacity — the available bandwidth is distributed across multiple customers simultaneously. NBN Business plans offer higher speed tiers, better SLA terms, and priority fault handling compared to residential NBN, but the underlying shared network architecture is the same. Dedicated capacity — where the connection is reserved exclusively for your business — is available only through enterprise carrier products such as Enterprise Ethernet or Dedicated Internet Access, which operate outside the NBN framework.
Q: What does "symmetrical" mean in fibre internet?
A: A symmetrical connection delivers the same speed in both directions — upload and download are identical. Most NBN plans are asymmetrical: a 500/50 Mbps plan delivers 500 Mbps download and only 50 Mbps upload. Dedicated fibre services are inherently symmetrical because the reserved capacity applies equally to both directions of traffic. Symmetry matters for businesses whose workloads consume significant upload bandwidth, including video conferencing, cloud backups, large file transfers, and hosted applications. A 100/100 Mbps symmetrical dedicated service often delivers more practical performance for upload-intensive workloads than a nominally faster asymmetrical NBN plan.
Q: How much does dedicated fibre internet cost in Australia?
A: Entry-level dedicated fibre circuits — typically 10 Mbps to 20 Mbps symmetrical — start at around $800 to $1,200 per month, excluding installation. Faster services escalate from there: 100 Mbps circuits typically range from $1,500 to $3,000 per month, and 1 Gbps services can reach $5,000 to $8,000 per month depending on the carrier and location. Installation costs can add several thousand dollars if new fibre infrastructure needs to be built to your premises. Dedicated fibre is most cost-competitive in capital city CBDs and established business precincts where multiple carriers have already built infrastructure and compete for the business. In suburban or regional locations, costs are typically higher.
Q: Can I get dedicated fibre internet at my office address?
A: Dedicated fibre availability depends on where existing fibre infrastructure has been built, which varies significantly by location. In major CBD areas and established business parks, multiple carriers typically have infrastructure and can quote competitively. In suburban office locations, availability is patchier — one carrier may serve the area while others do not, or a new fibre build may be required at significant cost. The only reliable way to determine what is available at a specific address is to have a carrier or a provider like Pickle run an address check across the networks of the major enterprise carriers. NBN availability at an address does not indicate dedicated fibre availability; they are separate infrastructure questions.
Q: Is dedicated fibre worth it for a small business in Australia?
A: For most small businesses — generally those with fewer than 30 staff and standard office workloads — the honest answer is no, not on a pure cost-benefit basis. A top-tier NBN Business connection with 4G failover provides reliable, resilient connectivity for well under $500 per month. Dedicated fibre at the entry level starts at three to four times that cost, with the price escalating sharply for faster speeds. The use cases where dedicated fibre makes clear economic sense are those where connectivity failure has a direct, measurable cost: contact centres that cannot operate without stable internet, financial services businesses with compliance obligations around connectivity, cloud-hosted businesses with consistently heavy upload requirements, and multi-site businesses needing private Layer 2 circuits between locations. If your business fits one of those categories, dedicated fibre is worth assessing seriously. If it does not, a well-configured NBN Business solution will almost certainly serve you well.