SIP Trunking

Reliable SIP Trunking That Keeps Australian Businesses Talking

DYN I.T. Solutions delivers SIP trunking services built for modern Australian businesses. Replace outdated phone lines with a flexible, cost-effective voice solution that scales with the business, improves call quality, and integrates seamlessly with existing phone systems. Straightforward setup, local support, and predictable pricing come standard.

Talk to the DYN I.T. team about switching to SIP today

Overview of SIP Trunking

SIP trunking is a modern way to make and receive phone calls over an internet connection instead of traditional copper lines or ISDN services. It connects a business phone system (PBX) to the public telephone network using a secure data connection.

What it is

A voice service that carries phone calls over the internet, replacing legacy PSTN and ISDN lines.

Who it's for

Australian businesses of any size that rely on phone communication, including offices, contact centres, trades, professional services, healthcare practices, and multi-site operations still using ageing phone infrastructure or paying too much for line rental.

Why it matters

Key benefits of engaging us for SIP Trunking

There are many reasons why businesses across Australia trust DYN I.T. Solutions. Here are some reasons clients choose to partner with us.

Lower call costs

Reduce monthly line rental and per-call charges compared to traditional phone services.

Scalable channels

Add or remove call channels as the business grows or seasonal demand shifts.

Business continuity

Automatic call failover routes calls to mobiles or alternate sites if an outage occurs.

Number flexibility

Keep existing phone numbers or add new local numbers from any Australian region.

Improved call quality

High-definition voice with proper Quality of Service (QoS) configuration.

Remote-ready

Support hybrid and remote workers with calls that follow staff wherever they work.

Simple integration

Works with most modern IP-PBX systems and cloud phone platforms.

What's Included

Voice services

SIP trunk provisioning and configuration
Local, national, mobile, and international call plans
Inbound number porting from existing providers
New local, 1300, 1800, and 13 numbers on request

Setup and integration

Compatibility assessment with existing PBX or phone system
Router and firewall configuration for voice traffic
Quality of Service (QoS) setup to prioritise call quality
Testing and cutover management to minimise disruption

Ongoing support and management

Local Australian help desk support
Fault diagnosis and carrier liaison
Call routing and failover configuration
Usage reporting and monthly billing review
Capacity planning as the business grows

Systems and platforms covered

3CX, Yealink, Cisco, Grandstream, and other IP-PBX systems
Microsoft Teams Direct Routing
Hosted and on-premise PBX environments
Softphones and desk handsets

Why DYN I.T. Solutions?

There are many reasons why businesses across Australia trust DYN I.T. Solutions. Here are some reasons clients choose to partner with us.

Experienced voice specialists

The DYN I.T. team has hands-on experience configuring SIP services across a wide range of Australian business environments, from single-site offices to multi-location operations.

Local support

Australian-based technicians who understand local carriers, number porting processes, and the nuances of the NBN and business-grade internet services.

Fast response times

When voice services go down, business stops. DYN I.T. prioritises voice issues and works directly with upstream carriers to resolve faults quickly.

Proactive maintenance

Ongoing monitoring of call quality, capacity, and network performance to catch issues before they impact the business.

Commercial understanding

DYN I.T. looks at the full picture, including internet capacity, phone system compatibility, and staffing patterns, to recommend a SIP solution that fits the business commercially and operationally.

Answering your questions about SIP Trunking

Not usually. Most modern IP-PBX systems already support SIP. DYN I.T. assesses the existing phone system first and only recommends changes if the current setup isn’t SIP-compatible or is nearing end of life.

Yes. Existing local numbers, 1300, 1800, and 13 numbers can be ported across to the SIP service. DYN I.T. manages the porting process to minimise downtime and keeps the business informed at every step.

SIP services can be configured with automatic failover, so incoming calls are redirected to mobile phones, another office, or a voicemail service during an outage. This is set up during onboarding based on the business’s continuity needs.

With the right internet connection and Quality of Service (QoS) settings, SIP calls typically sound clearer than traditional lines thanks to HD voice codecs. DYN I.T. reviews the network before cutover to make sure it’s ready to support quality voice traffic.

Savings vary depending on current call volumes and line rental, but many businesses reduce voice costs meaningfully after moving from ISDN or PSTN services. DYN I.T. provides a comparison based on recent phone bills so the numbers are clear before any decision is made.

Will the business need a new phone system to use SIP trunking?

Not usually. Most modern IP-PBX systems already support SIP. DYN I.T. assesses the existing phone system first and only recommends changes if the current setup isn't SIP-compatible or is nearing end of life.

Can existing phone numbers be kept when switching to SIP?

What happens to calls if the internet goes down?

Is call quality as good as a traditional phone line?

How much can a business save by switching to SIP trunking?

Book Your Free Audit with DYN I.T. Solutions

Ready to cut phone costs without cutting quality?

Speak with the DYN I.T. team to review current phone services and discover how SIP trunking can deliver better value, better flexibility, and better support. Book a free voice services review today

Book your Free Audit

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