Connect Your Existing On-Premise PBX to Modern VoIP in Australia
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Why replace the phone system that you already own? With Com2’s BYO phone system support, you can retain your on-premise PBX and upgrade to VoIP Australia-ready SIP trunks that deliver reliability, flexibility, and huge cost savings.
Whether you want SIP trunk installation, PAYG SIP trunks, a complete migration from ISDN, or need help choosing the best VoIP plans in Australia, Com2 makes the process simple, secure, and cost-effective.
We support every major PBX brand, including:
Keep Your Investment—Upgrade to SIP Instead of Replacing Your PBX
Com2 helps organisations across Australia, with a special focus on the Brisbane and Gold Coast areas, modernise their existing systems with reliable VoIP services and high-performance SIP trunks. You remain in control of your hardware—we upgrade your connectivity. We provide:
SIP registration & configuration
NAT traversal & firewall alignment
Codec matching: G.711, G.729
Quality of Service (QoS) optimisation
Zero-downtime migrations
Seamless ISDN/PSTN replacement
Compatible Hardware & Professional On-site Installation
Com2 helps organisations across Australia, with a special focus on the Brisbane and Gold Coast areas, modernise their existing systems with reliable VoIP services and high-performance SIP trunks. You remain in control of your hardware—we upgrade your connectivity. We provide:
- Yealink
- Grandstream
- Fanvil
Offering a wide range of T-series IP phones, DECT wireless solutions, and video conferencing endpoints.
Offering robust GXP desk phones and state-of-the-art Wi-Fi-enabled handsets.
Providing special-purpose hardware such as hotel phones, building intercoms, and paging devices.
We also supply all the necessary ancillary equipment like ATAs, PoE switches, session border controllers, and professional headsets. At Com2, we provide comprehensive provisioning to ensure a seamless rollout, from device deployment to network cabling, user training, and extensive system testing. We aim to ensure that everything is installed correctly on the first occasion to help guarantee immediate and reliable performance.
Comprehensive SIP Bundles for All Business Sizes
Our SIP bundles deliver excellent value and coverage, making them perfect for deployments ranging from small business offices to large-scale enterprise operations. Each SIP bundle channel comes fully loaded with 400 included minutes of calling. This allocation covers both local (PSTN) and Australian mobile calls, ensuring your team has the resources they need for day-to-day communication. This structure simplifies billing and provides predictability, regardless of your company’s size or call volume.
ENTERPRISE
$ 560 / mo
- 32 Channels
- Total: 12 800 mins
- Excess Rate:4.375c/min
- $17.50 Per Channel
PAY-AS-YOU-GO (PAYG) SIP Trunks
This plan is perfect for low-volume sites, organisations with legacy PBXs, testing environments, or highly seasonal businesses that need maximum flexibility. It provides cost control by ensuring you only pay for what you use. This service is compatible with any SIP-enabled PBX system.
PAYG SIP TRUNK
$ 7.50 / mo
- Included Minuted
- Call Rate: 7.5c/min
- Best For Low Usage & Older PBX Systems
SIP Trunk Setup & Migration Services
Seamless Integration with Your Existing PBX
Our Brisbane engineering team specialises in connecting legacy and modern PBX systems to enterprise-grade SIP trunks, including SIP trunk 3CX, Avaya, NEC, Panasonic, Yeastar, and others.
When you connect your on-premise PBX to Com2’s SIP trunks, you’re not just getting “basic setup.” You’re also getting a complete, engineered, end-to-end VoIP deployment in Australia built for reliability, security, and long-term stability.
Save up to 70% per year vs traditional phone carriers.
Com2 Communications is Brisbane’s trusted SIP & PBX specialist, providing enterprise-grade SIP trunks that directly integrate with your existing phone system. Whether you are migrating from ISDN or simply upgrading to reliable VoIP, Com2 delivers high-quality voice services with no new hardware required.
We work exclusively with Australian networks to ensure crystal-clear calls, stable SIP routes, and fast local support from real engineers, not offshore call centres. With our team’s hundreds of successful migrations completed with zero downtime, you can trust that you’ll enjoy the following benefits:
Cost Savings & Full Feature Retention
- Keep your current PBX—Avaya, NEC, Panasonic, Yeastar, Grandstream & more.
- No hardware replacement required—retain IVR, queues, voicemail & call recording.
Choose from bundled or flexible PAYG SIP trunks.
- Deployment-flexible, future-ready
- Works with on-premise, cloud, and hybrid PBX setups.
- Supports mobile VoIP apps & softphones for remote teams.
- Compatible with all major SIP-enabled systems in Australia.
Local Australian Support
- Direct access to Com2’s Brisbane engineering team.
- 24/7 priority support—no delays, no offshore escalation. Reliable long-term PBX and SIP system maintenance.
Ready to Connect Your PBX to SIP?
Whether you use Avaya, NEC, Panasonic, Grandstream, Yeastar, LG iPECS, or any SIP-capable on-premise PBX, Com2 will integrate your system with high-quality VoIP SIP trunk services—fast, clean, and disruption-free.
Keep your PBX. Cut your costs. Modernise your communications.
CUSTOMERS WHO TRUST COM2
