Key takeaways
- A traditional PBX is hardware in your office; a 3CX cloud system runs on hosted servers.
- Cloud systems let staff take calls anywhere through an app, with no lock-in contracts at Triad.
- Neither works in an office power cut without backup power, but cloud calls can ring on mobiles.
The short answer
A traditional phone system (PBX) is hardware installed in your office, while a 3CX cloud phone system runs on hosted servers and connects over the internet. For most small businesses and practices, cloud phones are more flexible and cheaper to scale, because there is no on-site system to buy, maintain or replace.
Side by side
| 3CX cloud (Triad) | Traditional PBX | |
|---|---|---|
| Where it runs | Hosted servers in Australia | A box in your office |
| Work from anywhere | Free mobile and desktop app | Usually limited to the office |
| Contracts | No lock-in contracts | Often hardware leases |
| Numbers | Keep your existing numbers | Tied to your lines |
| Scaling | Add a user in minutes | May need new hardware or licences |
| Call handling | Digital receptionist, queues, music on hold | Depends on the model |
| Power outage | Calls can ring on mobiles via the app | Stops without backup power |
| Maintenance | Updated centrally | On-site servicing |
When a traditional system still makes sense
Sites with very limited or unreliable internet, or specialised equipment that depends on legacy lines, may need more planning. We can assess your connection and design a hybrid where needed. See business phone systems and phones in a power outage.
Common questions
Is 3CX cheaper than a traditional phone system?
Often, because there is no on-site hardware to buy or maintain and calls between branches and remote staff are free. The exact saving depends on your current setup.
Do I need new handsets?
Not always. You can use compatible desk phones, headsets or the free softphone app; we recommend Yealink equipment.
How long does switching take?
Triad can usually have you running in under a day, subject to internet or 4G/5G availability.
Reviewed by Graham Graieg and Dane, Triad Networking Services. See our editorial policy.
Sources
General information only, current as of 6 October 2026.