Your NBN plan speed is a ceiling, not a guarantee. The number on your plan — 250 Mbps, 500 Mbps, 1,000 Mbps — is the maximum your connection can deliver. What your devices actually experience depends heavily on the router and network equipment sitting between that connection and your staff. A business-grade router makes a real, measurable difference. And many Adelaide businesses are quietly running consumer-grade gear that's throttling their productivity without anyone realising the connection itself isn't the problem.
What the NBN connection device actually does
When NBN installs your service, they fit a connection device to an interior wall — an ONT (Optical Network Terminal) for FTTP connections, or an NCD or NTD for other connection types. This device bridges the NBN network infrastructure to your premises. Your router plugs into it and takes over from there, distributing internet access to all the devices in your office via ethernet and Wi-Fi.
The ONT or NTD is NBN Co's equipment. You don't configure it, and your provider manages any issues with it. Everything downstream of that device — the router, the switch, the access points, the cables — is your domain. That's what determines the quality of the experience your team has.
Consumer vs business-grade routers
A retail router picked up at an electronics store for $80–150 is engineered for a household. A few devices, light usage, maybe a video stream or two running at the same time. Put one of those devices at the centre of an office network with 20+ devices — multiple simultaneous video calls, VoIP phones, cloud applications, file sync services running in the background, and guest devices on top of everything else — and that router will be the weak link in your connectivity chain. Not your NBN plan. Not your provider. The router.
Business-grade routers from manufacturers like Cisco Meraki, Fortinet, Ubiquiti, or MikroTik are purpose-built for concurrent connection load. They handle hundreds of simultaneous sessions without degrading. They support proper VLAN segmentation — creating separate, isolated network segments for staff, VoIP systems, guest Wi-Fi, and management traffic. They implement enterprise VPN configurations for remote access, not the consumer VPN apps that create security risks when misconfigured. And they run reliably for years without requiring a reboot every time performance drops.
Why QoS matters for VoIP and video calls
Quality of Service (QoS) is a router feature that prioritises certain types of traffic over others. The practical importance of this becomes clear during a large file download or backup: without QoS, that bandwidth-hungry background task competes equally with your VoIP call or Teams video conference. The file doesn't care about latency. The call does — and the result is choppy audio, dropped words, and an overall poor experience for whoever is on the other end.
A business router with properly configured QoS tells the network to prioritise voice and video packets above bulk data transfers. When the link is under load, calls stay clear, and the file transfer just takes a bit longer. Consumer routers either don't implement QoS, or implement it in a simplified way that doesn't actually solve the problem in a mixed-use office environment. This is one of the most practical differences between consumer and business-grade hardware for an office running VoIP phones alongside regular internet traffic.
Wired vs wireless — use ethernet where you can
Wi-Fi is essential for laptops, tablets, and mobile devices that move around the office. For everything else, a wired ethernet connection is faster, more reliable, and lower latency than Wi-Fi — full stop. Desktop computers, VoIP handsets, network printers, NAS devices, and anything sitting permanently at a workstation should be connected via ethernet where the cabling allows it.
A managed or unmanaged ethernet switch connects to your router and provides the wired ports to distribute to workstations. The investment in a decent switch and structured cabling to fixed workstations pays back immediately in reduced Wi-Fi congestion, better call quality on wired handsets, and faster local file transfers. In a properly equipped office, Wi-Fi is for mobile devices, and ethernet is for everything that doesn't move.
Wi-Fi coverage across the office
If your office has a large floor plate, multiple levels, or construction materials like concrete walls and metal partitions, a single router — regardless of how good it is — will create dead zones. The right solution isn't a consumer Wi-Fi extender or mesh node. Consumer extenders repeat the Wi-Fi signal, which halves available throughput and introduces timing inconsistencies that cause problems for voice and video applications.
The right solution for a multi-area office is enterprise Wi-Fi access points — separate hardware units connected via ethernet to your network switch and configured to present as a single managed wireless network. Devices roam between access points transparently, coverage is consistent throughout the building, and throughput isn't compromised by the signal-repeating approach. Manufacturers like Ubiquiti (UniFi), Cisco Meraki, and Ruckus make access points that are well-suited to business environments of various sizes.
What Caznet recommends
Every business is different, and the right network hardware for a 5-person professional services firm is genuinely different from what works for a 50-person operation across multiple floors. There's no single right answer, but there are wrong ones — and a consumer router running a business office is a wrong answer that we see more often than we'd like.
When we provision a new Business NBN service, we're happy to advise on appropriate router and network equipment for your site. If you're experiencing slow speeds or reliability issues despite what should be adequate internet, the problem is often solvable without changing your NBN plan. Call our team and we can help you work out where the bottleneck actually is.