VoIP Business Phone Systems in Australia
VoIP (Voice over Internet Protocol) business phone systems deliver calls over your internet connection rather than traditional phone lines — eliminating line rental costs, enabling calls from any device anywhere, and providing access to a full suite of professional phone system features at a fraction of the cost of legacy systems.
Browse Australian VoIP business phone system suppliers below, or use the filters to find vendors by feature set or system type.
What is a VoIP Business Phone System?
VoIP (Voice over Internet Protocol) converts voice into digital data packets and transmits them over an internet connection — the same way email or web browsing works. For businesses, this means phone calls are made and received through your broadband or NBN connection rather than through a dedicated phone line from Telstra or another carrier.
Modern VoIP business phone systems are cloud-hosted, meaning the system infrastructure is managed by your provider — you simply connect via internet-enabled devices including IP desk phones, softphone apps on computers, or mobile apps on smartphones. This makes them inherently flexible, location-independent and easy to scale.
VoIP eliminates per-line PSTN rental charges — calls are carried over your existing internet connection, often with significant savings on monthly line costs for multi-line businesses.
Make and receive calls from IP desk phones, desktop softphone apps, or mobile apps — the same business number works from any internet-connected device, anywhere in Australia.
VoIP call rates — particularly for national and international calls — are typically significantly lower than traditional PSTN call charges, with many plans offering unlimited local and national calls.
Auto attendant, call queuing, call recording, voicemail-to-email, call forwarding and conferencing — all included in modern cloud VoIP systems without additional hardware.
VoIP is the native voice technology for NBN connections — as PSTN copper infrastructure is retired, VoIP over NBN is the standard replacement for all Australian businesses.
Retain your existing business phone numbers when switching to VoIP — your VoIP provider manages the porting process from your current carrier.
How Much Do VoIP Business Phone Systems Cost?
VoIP business phone systems in Australia are typically priced per user per month. Entry-level plans start from around $15 – $30 per user per month for core calling features, rising to $45 – $65+ per user per month for plans with advanced features including call recording, analytics, call queuing and integrations.
- No line rental: Unlike PSTN systems, VoIP eliminates the per-line monthly rental charge — for businesses with multiple lines this alone can justify the switch.
- Hardware costs: IP desk phones typically cost $80 – $300 per handset — or avoid hardware costs entirely by using softphone apps on existing computers. See our phone hardware suppliers.
- Setup costs: Most cloud VoIP providers offer self-service setup with minimal professional services costs — compared to the significant installation costs of traditional PBX systems.
- Call costs: Many VoIP plans include unlimited local and national calls — check whether international call rates are included or charged separately if this is relevant to your business.
Ensuring Good VoIP Call Quality
- Sufficient bandwidth: Each simultaneous VoIP call requires approximately 85–100 Kbps of upload and download bandwidth — ensure your NBN plan provides enough headroom for your peak call volume.
- Quality of Service (QoS): Configure your router to prioritise voice traffic — this prevents large downloads or video streaming from degrading call quality during business hours.
- Wired connections: Where possible, connect IP phones and computers running softphones via ethernet rather than WiFi — wired connections provide more consistent latency than wireless.
- Business-grade NBN: For businesses with high call volumes, a business-grade NBN plan with guaranteed speeds and a Service Level Agreement provides better reliability than residential NBN plans.
If you're moving from a PSTN or on-premises PBX system to VoIP, see our NBN phone system suppliers who specialise in business migrations — including number porting and cutover planning.
Related Categories
Browse VoIP Business Phone System Suppliers in Australia
Use the filters below to find suppliers that match your specific requirements
