Reliable SIP Trunking Services
for Australian Business and Corporate Networks

Looking for a reliable SIP Trunk provider in Australia? Our business-grade SIP Trunking services deliver crystal-clear voice calls, lower telecommunications costs, and the flexibility modern organizations need to stay connected.

Whether you’re replacing ageing ISDN services, upgrading an existing PBX, or deploying a new VoIP phone system, our Australian SIP Trunk solutions provide secure, scalable, and cost-effective business communications.

Designed for organizations of all sizes, our SIP Trunks support small businesses, enterprise organizations, government departments, healthcare providers, education, retail, hospitality, and multi-site businesses throughout Australia.

Our SIP Trunk Features

Our Australian SIP Trunk service includes:

Unlimited scalability
Flexible concurrent call channels
Geographic Australian phone numbers
1300 and 1800 number support
Number porting from existing carriers
National, mobile and international calling
High-definition (HD) voice
Secure SIP authentication
Automatic failover routing
Disaster recovery options
Caller ID management
Emergency calling support
Call reporting and analytics
Local Australian technical support
Enterprise-grade network reliability

Advantages of Selecting

Telnetworks SIP Trunks

Lower Communication Costs – Reduce monthly line rental charges and benefit from competitive local, national, mobile, and international call rates.
Scale as Your Business Grows – Add or remove call channels as your business requirements change without installing additional physical phone lines.
Business Continuity – Keep your business connected even during unexpected outages. Calls can be automatically redirected to alternative offices, mobile phones, or remote employees.
Crystal Clear Voice Quality – Our enterprise-grade SIP network delivers high-definition voice quality with low latency and reliable call performance.
Support Remote & Hybrid Work – Employees can make and receive business calls from virtually anywhere while presenting a professional business number.
Keep Your Existing Numbers – Port your current business phone numbers with minimal disruption, ensuring business continuity throughout the migration.

SIP Trunking An Overview

SIP (Session Initiation Protocol) Trunking is the modern replacement for traditional business phone lines.

Instead of using physical copper or ISDN circuits, SIP Trunks connect your business phone system to the National Telephone Network over a secure internet connection.

This allows businesses to make and receive calls using existing phone numbers while reducing costs and improving flexibility.

If your organisation uses an IP PBX, hosted PBX, or Unified Communications platform, SIP Trunking provides a seamless connection to Australia’s telephone network.

Compatible with Leading Business Phone Systems

Our SIP Trunks integrate with many of leading business communications platforms, including:

3CX
Yeastar
FreePBX
Asterisk
Cisco
Mitel
Avaya
NEC
Panasonic
Grandstream
Microsoft Teams Direct Routing
Ribbon SBC
AudioCodes
Sangoma

Already have an IP PBX?
In most cases, we can connect your existing phone system without requiring new hardware, helping reduce migration costs.

Industries We Support

Our SIP Trunking services are trusted by a vast assortment of organizations and industries across Australia, including:

Professional Services
Healthcare & Medical Clinics
Aged Care Providers
Retail Chains
Hospitality
Construction
Manufacturing
Government
Local Councils
Education
Financial Services
Mining & Resources
Logistics & Transport
Call Centres

Benifits of Selecting Telnetworks

As An Australian SIP Trunk Provider

Our mission is simple — deliver reliable, affordable, and enterprise-grade VoIP services backed by responsive Australian-based Network Engineers

Working with Telnetworks as a local Australian provider means you receive –

Australian-based support engineers
Local number porting expertise
Compliance with Australian telecommunications regulatory requirements
Fast deployment
Reliable business-grade infrastructure
Flexible commercial plans
Personalised service from experienced VoIP specialists

We understand the communication requirements of Australian businesses and provide solutions designed for performance, reliability, and long-term growth.

Whether you’re migrating from ISDN, upgrading an existing PBX, or implementing a new cloud communications strategy, we’ll help you every step of the way.

Numbers Speak Volumes

We have the capacity to Serve You

Business Networks

1000 +

Voice Lines On Our Network

7000 +

Daily Voice Network Calls

100000 +

Uptime in The Last 365 Days

1 %

For more detailed information relating to our Network. Please see our Network Status Page.

Multi-Carrier Redundancy

What Sets Us Apart

What sets us apart from every single other SIP Trunk Provider is our Multi-Carrier Redundancy on our SIP Trunks.

Telnetworks inter-connects to every single major Australian Voice Carrier at our Network Points of Presence Across Australia.

When a single Voice Network Carrier is having Network Outages and Issues, we instantaniously move all traffic from that carrier to any other available carrier.

Thereby, maintaining flawless Voice Connectivity to our Business and Corporate customers across Australia.

This is how we have maintained 100% SIP Voice Network Uptime since March 2020.

Ready to Modernise Your Business Communications?

1300 700 077 • info@telnetworks.net.au

Speak with our SIP VoIP Network Engineers for a free assessment of your existing phone system.

We’ll recommend the right SIP Trunk solution, explain the migration process, and provide a competitive quote with no obligation.

Get in touch today to discover how our Telnetworks Australian SIP Trunk services can reduce costs, improve reliability, and prepare your business for modern Telecommunications

Business SIP Trunks
Upgrade Your Network to
Secure, Scalable, and Cost Effective Business Communications

Infrastructure Hosted Locally
In Australian Data Centers

End-to-End
Secure SIP or RTP Transmission

Multiple SIP Gateways
For Latency & Resilience