3CX & SIP trunks Melbourne — unified communications
3CX phone systems and SIP trunks for Melbourne businesses, set up and secured by Key IT's security-certified engineers. Keep your numbers and cut call costs.
One number, every path covered
3CX greets every caller, sends them to the right team, follows you to any device, and routes after-hours calls to an on-call mobile or voicemail. Here's a typical flow we set up — and you can change it yourself in minutes.
Your phone system, set up and managed by us
We handle the 3CX admin so you don't have to — users and extensions, 2FA, IP-phone provisioning, and Microsoft 365, Google and Teams integration. Your team just makes and takes calls, anywhere.
Sample console — we provision and manage all of it for you.
3CX and SIP trunks in Melbourne
Key IT sets up, migrates and supports 3CX phone systems and SIP trunks for Melbourne businesses: we port your existing numbers, build your call flows and look after the system once it's live. 3CX itself is a complete unified-communications platform — calls, video, chat and advanced call handling in one system — that suits businesses of every size and usually costs less than a traditional PBX and phone lines.
What does a 3CX phone system include?
Everything a business phone system should do, plus video and chat:
Advanced call handling
Queues, IVR menus, ring groups and reporting.
Video conferencing and chat
Built in, no extra platform required.
Work from anywhere
Desk handset, computer or mobile app, with the full system on each.
Lower costs
SIP trunks replace expensive traditional lines.
How do SIP trunks work with 3CX?
A SIP trunk carries calls between your 3CX system and the public phone network over your internet connection, replacing old copper or ISDN lines. It cuts line-rental costs and grows by adding call channels rather than new lines. We configure 3CX and the trunk together, check your bandwidth and firewall, and where needed recommend business internet with failover, for clear calls that don't drop.
How does a 3CX setup with Key IT work?
A 3CX setup with Key IT runs in five steps, and your current phone service keeps running until the switch-over:
Map your calls
Who answers first, which queues you need, and what happens after hours.
Choose the setup
3CX in the cloud or on your own server, the SIP trunk, and a handset or app for each person.
Build and test
Extensions, ring groups, IVR menus and voicemail, tested with real calls before go-live.
Port your numbers
Your existing numbers move across to 3CX.
Support and change
Key IT handles new starters and call-flow changes, and caller analytics can show how your phones are really performing.
Want to see what this looks like for your business? A free IT & Cyber Security Review shows where you stand and what to fix first — no jargon, no obligation.
Book a Free ReviewIs 3CX secure?
Yes, when it's locked down and kept up to date, like any system that faces the internet. The main risk is toll fraud, where criminals break into a poorly protected phone system and run up international calls on your bill. In 2023, 3CX's own desktop app was also caught up in a widely reported supply-chain attack, which is why prompt patching matters.
How our security-certified engineers lock 3CX down:
- two-factor authentication on the 3CX admin console
- international and premium-rate dialling limited to the countries you actually call
- 3CX, handset firmware and apps kept on current, supported versions
- Key IT's 24/7 SOC monitoring when 3CX runs on a server we manage
Phones are also the way in for voice-cloning scams, so agree a call-back rule for any payment request made by phone.
Frequently asked questions
What is 3CX?
A unified-communications platform that handles calls, video, chat and advanced call features for businesses of any size, accessible from desk phones, computers and mobiles.
What are SIP trunks?
Phone lines delivered over the internet rather than traditional copper, reducing cost and scaling easily. They connect your phone system to the public phone network.
Can 3CX work for remote and hybrid teams?
Yes. Staff use the full system from anywhere via the desktop or mobile app.
Do we need new desk phones for 3CX?
Not always. 3CX works with IP desk phones from makers such as Yealink, Fanvil and Snom, and staff can also use the free 3CX mobile apps or a web browser. We check which of your current handsets are supported before recommending new ones.
Does 3CX work with Microsoft Teams?
Yes. 3CX can connect to Microsoft Teams so staff make and take business calls inside Teams (each user needs a Microsoft Teams Phone licence), and it can sync users and contacts from Microsoft 365. If you only want to call from Teams, Microsoft Teams Voice may be simpler; we'll compare both.
Will I save money moving to 3CX and SIP?
Usually, yes — lower line costs and no expensive PBX hardware, with more features. We quote so you can compare directly.
Can you migrate us from our old phone system?
Yes. We migrate you to 3CX, porting your numbers and configuring call flows, with minimal disruption.
Is 3CX better than Microsoft Teams Voice?
Each suits different needs. 3CX offers richer call handling; Teams Voice is ideal if you already run Microsoft 365. We help you choose.
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From manufacturing and healthcare to finance, body corporate and professional services — a few of the businesses whose IT and security we run every day.
Elite Body Corporate
Probus GroupBook your free IT & Cyber Security Review
See exactly where your IT and security stand, and what to fix first. No jargon, no obligation.