How VoIP Works Over NBN and Why Businesses Use It

VoIP stands for Voice over Internet Protocol. Instead of sending your voice through traditional copper phone lines, VoIP converts it into digital data and transmits it over your internet connection. 

If you’ve ever used Zoom, Skype or FaceTime, you’ve already experienced VoIP in action. 

For businesses, VoIP replaces the old on-site PBX phone system with a cloud-based phone service (sometimes called a virtual PBX). This means your phone platform is hosted and managed online by your provider. You simply connect your phones via the internet and pay a monthly service fee — often per user — without needing to buy expensive hardware or maintain a physical phone system. 

Using VoIP on an NBN connection offers several key advantages: 

• Lower costs – No more paying for individual phone lines or expensive maintenance. Most VoIP plans include features like voicemail, caller ID, forwarding, and call queuing as standard. 

• Scalability and flexibility – Easily add new users, adjust call limits, or support multiple office locations. 

• Quality and reliability – With a stable NBN internet connection, VoIP calls can be clearer and more dependable than older copper landlines. 

VoIP is only as good as your internet connection. To ensure clear and reliable calls, check these factors: 

Key Factors for Clear Calls

• Speed – Each VoIP call uses roughly 1.3 MB per minute. While this is small, multiple users or heavy data activity means you’ll need adequate upload and download speeds. 

• Stability – Consistent speeds and low latency are key. Avoid networks that drop packets or have frequent slowdowns. 

• Hardware Quality – Invest in a reliable router that supports Quality of Service (QoS). This feature prioritises voice packets so your calls stay smooth even when others are streaming or uploading. 

• Network Setup – Use wired Ethernet connections where possible rather than Wi-Fi for business phones, and ensure your firewall allows VoIP traffic. 

To get your VoIP service running smoothly, you’ll need: 

• Compatible handsets – You can reuse existing phones if they support VoIP, but IP phones (SIP-enabled) offer the best experience. 

• ATA (Analogue Telephone Adapter) – Lets you connect standard analogue handsets to your VoIP service by converting voice signals to digital. 

• A capable modem/router – Choose a business-grade model that handles multiple users, prioritises voice traffic, and supports your NBN speed. 

• Good cabling and setup – Whenever possible, connect phones via Ethernet cables rather than relying solely on Wi-Fi. 

Not all VoIP services are equal, so pick a provider who understands business needs and the NBN environment.  

What to Look For in a Provider 

• Comprehensive features – Such as voicemail-to-email, call forwarding, mobile apps, auto-attendants, and integration with your business tools. 

• Network quality – Reliable voice traffic routing with minimal latency and jitter. 

• Security – Strong encryption and fraud protection for peace of mind. 

• Support – Business-grade support and service level agreements (SLAs) so any issues are resolved quickly. 

• Scalability – Easy to grow your service as your team expands. 

Here’s how to make the switch smoothly with Yomojo: 

1. Review your setup – Check your NBN speed and determine how many users or concurrent calls you’ll need. 

2. Choose your devices – Decide whether to reuse existing phones with an ATA or go fully IP-based with new handsets or softphone apps. 

3. Select your plan – Yomojo can help match your business needs with the right call plans and features. 

4. Optimise your network – Enable QoS on your router and configure your network for voice traffic. 

5. Port your numbers – Keep your existing business numbers by porting them to Yomojo’s VoIP system. 

6. Test and go live – Run trial calls, check quality, and once everything’s stable, fully switch over and retire old phone lines. 

VoIP over the NBN isn’t just a replacement for traditional phone lines — it’s a smarter, more flexible solution that supports modern work environments. With reliable internet, quality equipment, and the right provider, your business can benefit from clearer calls, lower costs, and seamless scalability. 

At Yomojo, we make moving to VoIP simple. Talk to us today to learn how we can help modernise your business communications with a tailored, NBN-ready VoIP solution.