Not all business internet is created equal. Here is a clear guide to NBN business plans, dedicated fibre, enterprise ethernet, and 5G backup for Melbourne businesses.
Internet connectivity is the infrastructure on which everything your business does digitally now runs. Microsoft 365, your CRM, your accounting software, your phone system, your client portals, your team communication — all of it lives in the cloud, all of it requires an internet connection, and all of it stops working when the internet goes down.
Yet most Melbourne businesses treat internet connectivity as a commodity — find the cheapest plan that seems fast enough, sign a 24-month contract, and hope it works. This approach costs more over time than it saves upfront.
Here is what you need to know to make the right decision.
Understanding the Australian Business Internet Market
The Australian business internet market has three main categories:
NBN business connections: The National Broadband Network, delivered via a range of technologies (FTTP, FTTC, FTTB, FTTN, HFC). Business NBN plans offer higher speeds and higher data allowances than residential plans, and often include SLAs (service level agreements) with response time commitments.
Dedicated fibre (enterprise ethernet / DIA): A dedicated fibre connection where the entire bandwidth is reserved for your business — not shared with neighbours. Available in major Melbourne commercial areas and business parks.
4G/5G wireless: Either as a primary connection in areas without adequate fixed-line infrastructure, or increasingly as a backup/failover connection for businesses whose primary connection occasionally fails.
NBN Business: What It Is and What It Is Not
NBN business connections are the default choice for most Melbourne SMBs. They are available across most of metropolitan Melbourne, offer a range of speed tiers, and are significantly cheaper than dedicated fibre.
What makes “business” NBN different from residential?
- Higher speed tiers available: Business NBN can be ordered with guaranteed minimum speeds (wholesale speed guarantee) that residential plans do not offer. Speeds range from 50/20 Mbps up to 1000/400 Mbps depending on the connection type available at your premises.
- SLA with response time commitments: Most business NBN plans include a service level agreement with 12-hour fault response times and compensation provisions. Residential plans have no such guarantee.
- Static IP addresses: Business NBN typically includes one or more static IP addresses — essential for businesses hosting services, running VPNs, or requiring consistent remote access.
- Priority traffic handling: Some business plans include priority traffic handling on the NBN network.
The honest limitations of business NBN
NBN is contention-based shared infrastructure. Your connection is delivered from the nearest node or exchange, shared with other premises in your area. During peak periods — typically 7-10pm, but also during the business day in dense commercial areas — actual speeds can be significantly lower than the plan speed.
The “50 Mbps download” you are paying for is a speed tier, not a guaranteed minimum speed for most plan types. On Business Enterprise Ethernet NBN plans, you do have a minimum assured speed — but on standard business NBN, you share the infrastructure.
For a 10-person business using cloud applications with reasonable efficiency, standard business NBN is usually adequate. For a 50-person business running high-quality video calls simultaneously, running a cloud-hosted phone system at volume, and accessing large files from SharePoint — shared NBN may produce frustrating performance inconsistencies.
Dedicated Fibre: When and Why You Need It
Dedicated fibre (also called enterprise ethernet, Dedicated Internet Access, or DIA) is a leased line that provides your business with a private fibre connection from your premises to the carrier network. The bandwidth is yours — not shared with anyone else.
What dedicated fibre provides:
Guaranteed speeds: If you order 100 Mbps dedicated fibre, you get 100 Mbps. At 3pm, at 9am, at any time of day. The SLA is based on the actual speed you receive, not a theoretical maximum.
Symmetric speeds: Dedicated fibre is symmetric — equal upload and download speeds. This matters significantly for cloud-heavy businesses, because upload speed determines how quickly your staff can push files to SharePoint, send large email attachments, participate in video calls, and upload client data. NBN is asymmetric — download is fast, upload is much slower.
Enterprise SLA: Most dedicated fibre providers offer 4-hour fault response and 99.95% or 99.99% uptime SLAs with financial penalties for breach. If the connection goes down, there is a strong commercial incentive for the provider to fix it fast.
Scalable: Dedicated fibre connections can typically be upgraded in bandwidth without changing the physical infrastructure.
The cost of dedicated fibre
Dedicated fibre is significantly more expensive than NBN. A 100 Mbps dedicated connection in Melbourne typically costs $800-2,000+ per month depending on the provider, the premise location, and the contract terms.
For a 10-person office, this is hard to justify. For a 50+ person office where internet downtime costs $5,000+ per hour in lost productivity, an $800/month guaranteed connection with an enterprise SLA is very easy to justify.
Who needs dedicated fibre?
- Businesses with 30+ cloud-dependent staff where shared NBN performance inconsistency is a productivity issue
- Any business where internet downtime has a direct client revenue impact (financial services, legal, medical)
- Businesses running cloud-hosted phone systems at volume — VoIP quality degrades under bandwidth pressure
- Businesses with large-file workflows (creative agencies, engineering firms, data-heavy professional services)
4G/5G Failover: Cheap Insurance for Critical Connectivity
Every business that is seriously dependent on internet connectivity should have a failover connection. This is a separate connection that activates automatically if the primary connection fails — so your staff continue working and your systems stay online while the fault is being resolved.
How failover works
A dual-WAN router (or next-generation firewall with WAN failover) monitors the primary internet connection continuously. If the primary connection drops or degrades below a threshold, the router automatically routes all traffic to the secondary connection. When the primary recovers, traffic shifts back.
From a staff perspective, this is invisible. The internet blinks for 15-30 seconds during the failover — and then everything works again. No one calls IT.
Without failover, an internet outage triggers an all-hands incident: staff cannot access cloud systems, phone calls fail, client-facing services are interrupted, and your IT provider spends 2-4 hours (or more) managing a fault that NBN Co needs to resolve in the network.
The cost
A 4G/5G backup SIM with a business data allowance (50-100GB/month) costs approximately $30-80/month. A capable dual-WAN router costs $500-1,500 as a one-time purchase (or is included in a managed firewall service).
For a 20-person business, a 4-hour internet outage costs approximately $5,000-8,000 in lost productivity. The $50/month failover SIM pays for itself in the first avoided outage.
Choosing the Right Connection: A Framework
| NBN Business | Dedicated Fibre | 4G/5G Backup | |
|---|---|---|---|
| Monthly cost | $80-400 | $800-2,000+ | $30-80 |
| Speeds (typical) | 50-1000 Mbps | 50-1000 Mbps guaranteed | 50-200 Mbps |
| Upload symmetry | No (much lower upload) | Yes | Moderate |
| SLA | 12hr response | 4hr response, 99.95%+ uptime | None |
| Shared infra | Yes | No | Shared mobile network |
| Best for | Up to 30-40 staff | 30+ cloud-dependent staff | Failover for all |
Recommended configuration for most Melbourne SMBs:
- Up to 20 staff: Business NBN 100/20 or 250/25 + 4G/5G failover
- 20-50 staff: Business NBN Enterprise (with speed guarantee) + 4G/5G failover, or evaluate dedicated fibre
- 50+ staff or high dependence on connectivity for client delivery: Dedicated fibre + 4G/5G failover
What to Look for in a Business Internet Provider
Contract length: 24 months is standard. Some providers offer 12-month terms for a premium. Avoid 36-month terms unless the pricing justification is significant — connectivity technology changes enough over 3 years that locking in can create problems.
SLA specifics: What are the response time commitments? What compensation applies if the SLA is breached? What constitutes a fault under the SLA?
Proactive monitoring: Some managed internet providers include proactive connection monitoring — they know your connection is having issues before you do. This significantly reduces resolution time.
IP addressing: How many static IPs are included? What is the process for requesting additional IPs if needed?
Support quality: For a business-critical connection, the support team matters more than the price. How does the provider communicate during outages? Do they have a 24/7 NOC? How quickly do they escalate to carriers?
The Internet Audit: What Most Businesses Find
When we review internet connectivity for Melbourne businesses, the most common findings are:
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On the wrong plan for their headcount: A 40-person business on a plan designed for 10-15 users, experiencing performance issues they have attributed to “the internet being slow” rather than under-provisioning.
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No failover connection: One connection, no backup. An NBN fault means a full business outage.
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Paying for bandwidth they do not need: The opposite problem — paying for 1000 Mbps dedicated plans when a 100 Mbps guaranteed connection would comfortably serve their requirements.
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On an automatic rollover from an expired contract: On outdated pricing and terms because no one reviewed it at renewal.
Internet connectivity is worth reviewing with the same rigour you would apply to any other infrastructure cost. It is the foundation of every digital system your business depends on — and most businesses have not looked at it properly since they moved in.
