SIP Trunking
Business-grade voice connectivity and SIP across Australia and New Zealand.
What is SIP trunking?
Lightwire provides business SIP Trunks and wholesale SIP trunking options across Australia and New Zealand, helping businesses modernise communication with scalable, secure, and fully managed SIP solutions.
SIP trunking connects your phone system (PBX) to the public telephone network using the internet instead of traditional phone lines. It’s flexible, secure, and built for modern communication.
With Lightwire, you get enterprise-grade SIP trunks that deliver crystal-clear voice quality, scalability, and the reliability your business or customers depend on.
Whether you need an Australian SIP trunk, a New Zealand SIP trunk, or a certified 3CX SIP trunk provider, Lightwire delivers performance, reliability, and expert support.
Why choose Lightwire SIP trunking
Lightwire provides SIP trunking designed for performance, reliability, and growth - trusted by businesses, MSPs, and other telcos across Australia and New Zealand.
- Certified and preferred 3CX SIP trunk provider with proven performance across thousands of channels
- Compatible with other leading PBXs including Cisco PBX, Avaya PBX, Yeastar PBX, FreePBX, Samsung PBX, AudioCodes PBX, and Microsoft Teams
- Local number DDI\DID hosting options in New Zealand and Australia
- NZ toll free (0800) and AU 1300 / 1800 inbound numbers available
- Scalable from a single channel to hundreds - ideal for SMBs, enterprise, and contact centres
- Geo-redundant infrastructure with automatic failover and diversity
- Low latency voice routes across both countries for premium quality
- Real-time analytics, usage tracking, and provisioning in our illume partner portal
- 24/7 support and engineering support across NZ and AU
Plans that scale with you
Lightwire offers a range of flexible plans so you can choose what suits your business model.
Every plan includes options for:
- Local DDI\DID numbers in NZ & AU
- 0800, 1300 & 1800 inbound services
- Competitive international rates
- Flexible scaling - add or remove channels as your business grows
- Disaster recovery routing and call forwarding
Boundless calling
Perfect for businesses with lower call volumes or seasonal operations.
Pay only for what you use with competitive per-minute rates across New Zealand and Australia.
Smart bundles
Combine channels, minutes, and number hosting into cost-effective packages that maximise value.
Ideal for growing businesses and partners managing multiple sites.
Pay as you go
Perfect for businesses with lower call volumes or seasonal operations.
Pay only for what you use with competitive per-minute rates across New Zealand and Australia.
Built for business & partners
Lightwire’s SIP platform is designed for business.
Lightwire’s SIP trunks are backed by our business and wholesale support model, giving partners and end users the same consistent experience - reliability, flexibility, and real local expertise.
Whether you’re delivering solutions to customers or managing your own infrastructure, you get the same enterprise-grade reliability and flexibility.
- White-label options available for MSPs, ISPs, and wholesalers
- Real-time provisioning and billing through the Illume partner portal
- Transparent commercials with flexible channel and usage-based pricing
- Tiered support models designed for business and wholesale clients
- Seamless integration with other Lightwire services like managed 3CX and hardware
We work alongside you to design, deploy, and support your SIP environment - ensuring a seamless setup and ongoing reliability.
"It was really important for us to have 3CX certified SIP Trunks, and teaming with Lightwire has been the easiest process.
They’re straightforward with a fantastic support team that help you achieve your complex problems for clients."
Chris Boyd, Director
South Pacific IT
Value-added services
We go beyond connection - our team helps you get the most out of your SIP solution
Analysis
Our sales specialists help analyse your current phone bill to align the most cost-effective Lightwire plan.
Provisioning
Managed provisioning services coordinate number porting and SIP setup from start to finish.
Trial
Every customer gets access to a free SIP trunk trial to test voice quality and compatibility before committing.
Security
For 3CX users, we guide you through configuration or manage it for you directly - ensuring a seamless setup.
Integration & compatibility
Lightwire SIP trunking is fully 3CX interop certified, giving you peace of mind that every call will connect seamlessly.
Beyond 3CX, we have hundreds of customers using our trunks with a wide range of PBX systems across Australia and New Zealand.
3CX integration
We help you configure your SIP trunk with 3CX - whether through guided setup, remote assistance, or full management by our engineers.
Optimised deployment
With step-by-step provisioning and testing, your system will be ready fast
and optimised for reliability.
Security & reliability built in
Every SIP trunk is delivered over Lightwire’s high-availability voice network with built-in redundancy and active monitoring.
SIP/TLS and SRTP keep your calls encrypted and private, while automatic failover ensures business continuity even in the event of a site or carrier issue.
Lightwire’s dual-country backbone and carrier-grade interconnects deliver consistent, low-latency performance across New Zealand and Australia.
Connectivity
Broadband and managed networks to keep your business running.
Voice
Unified communications with Teams Phone and hosted 3CX that scale with your team.
Hardware
Hardware available on a managed basis, or on an outright sale basis.
Security
Managed firewalls, proactive monitoring and enterprise-grade threat detection.
WAN
MPLS and SD-WAN with diverse failover, managed firewalls, and trans-Tasman options to connect and secure multi-site businesses.
Partner tools
illume, our real-time portal, with service insights, proactive alerts, and usage reporting that scales with your growth.
Embedded support
We become part of your team, getting to know your business and your customers so we stay aligned with your goals.
Why choose Lightwire over other providers
Lightwire is your trusted partner for wholesale SIP trunking, Australian SIP trunks, New Zealand SIP trunks, and 3CX SIP trunking.
Unlike other providers, we offer scalable, fully managed SIP solutions and expert support.
We’re one of the region’s largest 3CX-certified SIP trunking providers, trusted by partners and thousands of users.
Our local expertise, redundant network, and customer-first approach set us apart.
