broadconnect-authorWhat Is SIP Trunking and Why Businesses Use It?
Many Australian businesses are moving away from old copper phone lines, but most owners still want to know one simple thing: what is SIP trunking and why is everyone using it.
SIP trunking is a modern way to run your office phone system. Instead of using physical phone lines, your calls run over a reliable internet connection. This gives your business clearer call quality, lower monthly costs and the ability to work from anywhere.
This guide explains what exactly is SIP trunking, how it works and whether it is the right choice for your business.
1. What Is SIP Trunking?
SIP trunking allows your business to make and receive phone calls using the internet instead of traditional phone lines. It connects your phone system (PBX) to the outside world through your internet provider.
The best way to think about it:
- Old method: Phone line connects to phones
- New method: Internet connection links to SIP trunk, which connects to your PBX and phones
If your internet is strong and stable, SIP trunking gives you better reliability and lower costs.
2. How SIP Trunking Works for Australian Businesses
If you are still unsure about what is SIP trunking in a practical sense, think of it as a modern replacement for copper phone lines that runs on your internet connection. Here is a simple step by step explanation of how SIP trunking works:
| Step | What Happens | What It Means For Your Business |
|---|---|---|
| 1 | Your PBX connects to a SIP trunk | No physical phone lines required |
| 2 | Calls travel through the internet | Faster and more flexible setup |
| 3 | SIP provider routes your call | Higher voice quality and stability |
| 4 | Customers hear you on a normal phone | No difference on the caller’s end |
| 5 | Monthly costs are reduced | Predictable pricing and cheaper bills |
3. Benefits of SIP Trunking for Australian Companies
Understanding what is SIP trunking also helps you plan future upgrades like cloud PBX or Microsoft Teams Calling.
| Benefit | Description |
|---|---|
| Lower call costs | Calls are cheaper than traditional landlines |
| Higher call quality | HD audio when paired with business grade internet |
| Scales easily | Add or remove lines as your business grows |
| Works from any location | Supports remote and hybrid work models |
| No waiting for technicians | No copper lines or on site wiring |
| Integrates with modern tools | Works with Teams, Webex and cloud PBX |
4. SIP Trunking vs Traditional Phone Lines
| Feature | Traditional Phone Lines | SIP Trunking |
|---|---|---|
| Monthly cost | Higher | Lower |
| Voice quality | Depends on copper lines | Clear with good internet |
| Setup time | Slower | Faster |
| Remote work support | Limited | Fully supported |
| Scaling | Difficult | Easy |
| Backup options | Limited | Supports 4G and 5G failover |
5. What You Need to Use SIP Trunking
SIP trunking does not require expensive hardware. Most businesses already have what they need.
You need:
- Stable business internet
- A PBX system (cloud or on premise)
- SIP account from a provider
- A business router that supports voice traffic
Optional:
- 4G or 5G failover
- Enterprise Ethernet for higher stability
- Business headsets for teams using softphones
As part of our full offering, Broadconnect provides the SIP trunking service on top of our business-internet framework, giving you a one-stop solution with unified voice and data.
6. How Much SIP Trunking Costs in Australia
Prices vary depending on the number of channels and call volume, but here is a general overview.
| Item | Typical Price (AUD) |
|---|---|
| SIP channel | $10 to $25 per month |
| DID phone number | $1 to $5 per month |
| Local calls | Often included |
| National calls | Often included |
| Mobile calls | Low per minute rate |
| Unlimited calling plans | Available |
Broadconnect customises SIP trunking plans to fit your business size – whether you’re a small team or call-centre. With Australian-based support and no hidden lock-in contracts this makes quoting and switching easier.
7. Who Should Use SIP Trunking in Australia
SIP trunking works well for businesses that rely on phone communication. Examples include:
- offices with 5 to 200 staff
- contact centres
- real estate agencies
- healthcare clinics
- law firms and finance businesses
- trade and field service companies
- businesses using Microsoft Teams or Webex calling
If your business handles frequent phone calls, SIP trunking is a smart upgrade.
8. Does SIP Trunking Work With Teams, Webex and Cloud PBX
Yes. SIP trunking connects directly with:
- Microsoft Teams Calling
- Cisco Webex Calling
- Cloud PBX systems
- Softphone apps on computers and mobiles
- Contact centre platforms
This is ideal for businesses using cloud tools or remote teams.
9. Why Aussie Businesses Trust Broadconnect for SIP Trunking
Broadconnect has been supporting Australian companies for more than 30 years and is known for delivering stable and reliable business SIP trunking services. Businesses choose us because:
- We focus only on business internet and voice solutions
- All support is handled by Australian based teams
- Our SIP trunking runs on business grade networks for steady call quality
- Setup and migration are managed by our technical team
- Scaling is simple with the option to add or remove channels anytime
- Works smoothly with Microsoft Teams, Webex and cloud PBX systems
- 4G and 5G failover options keep calls active during outages
Broadconnect | Business NBN and Internet Provider Australia
For internet and voice setup guidance across Australia, explore The Complete Guide to Choosing the Right NBN and Internet Provider for Your Business in Australia.
Conclusion
SIP trunking is simple, flexible and cost effective. It replaces old phone lines with a modern system that uses your internet connection. Most Australian businesses benefit from lower costs, clearer audio and the ability to support remote workers.
If your current phone system is outdated or expensive to maintain, SIP trunking is worth considering.
Get in Touch
Once you understand what is SIP trunking and how it works, choosing the right provider becomes much easier. As Australia’s trusted business telco, Broadconnect offers local account managers, 100% Australian support teams and full integration of voice and data services, helping you upgrade confidently.
📞 Call: 1300 880 330
✉️ Email: hello@broadconnect.com.au
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