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The right business phone system depends on how your team works: how many people take calls, whether they work remotely or across sites, and whether you already use Microsoft 365. For most Australian businesses the choice comes down to four types: traditional phone lines, an on-site PBX, a cloud phone system or Microsoft Teams Calling. This guide covers each one, the features worth having and the questions to ask before you decide. To talk it through with us, see our business phone systems.
What Is a Business Phone System?
A modern business phone system does more than make and receive calls. Most platforms now bring together:
- Voice calls
- Video meetings
- Mobile apps and computer softphones
- Call recording
- Auto attendants
- Voicemail to email
- CRM integration
- Microsoft Teams integration
- Call analytics and reporting
The aim is to answer calls professionally while staff work from the office, from home or on the road.
Main Types of Business Phone System
| Type | Where it runs | Suits |
|---|---|---|
| Traditional phone lines | Fixed lines and handsets at your premises | Small offices with simple calling needs |
| On-site PBX | A phone system box in your office or comms room | Businesses with existing PBX equipment or a need for on-site control |
| Cloud phone system | A hosted platform reached over the internet | Remote teams, multiple sites and growing businesses |
| Microsoft Teams Calling | Inside Microsoft Teams | Businesses that already work in Microsoft 365 |
1. Traditional business phone lines
Traditional phone systems use fixed phone numbers and equipment at your premises. For a business with very simple requirements, they may still be enough.
Strengths: familiar, a dedicated number, simple setup and reliable basic calling.
The catch: limited flexibility, and expensive to expand as you grow.
Best suited for: small offices with minimal phone requirements.
2. On-site PBX phone systems
A PBX (private branch exchange) lets staff share incoming numbers and transfer calls between extensions. An on-premises PBX sits in your office or comms room, so you own the hardware and control the setup. Businesses in sectors such as law, finance and government often prefer that control.
Strengths: internal extensions, call transfers, call routing, multiple calls at once and full control of the equipment.
The catch: installation takes longer, expanding usually means more hardware and a technician visit, and maintenance costs grow as the equipment ages.
Best suited for: organisations with existing PBX equipment that aren’t ready to move to the cloud.
3. Cloud phone systems and hosted VoIP
For many Australian businesses, a cloud phone system is now the default choice. The system runs in secure data centres instead of your office and reaches you over your internet connection using VoIP (Voice over Internet Protocol). That brings:
- Work from anywhere. Staff can answer calls on a desk phone, a mobile or a computer, and someone working from home looks the same to callers as a colleague in the office.
- Simple to scale. Adding a new employee can be as easy as creating a new extension, with no major hardware upgrade.
- Predictable costs. Less hardware to buy and maintain, and a regular monthly bill.
- Business continuity. If the office is closed, staff can still answer calls wherever they have a connection.
Call quality depends on your internet connection, so it’s worth checking it before you switch.
4. Microsoft Teams Calling
Microsoft Teams Calling puts business phone calls inside Teams, next to chat, video meetings and shared files. Staff can move from editing a document with a colleague to a call with a client without switching apps.
It’s cloud-based, so it shares the cloud benefits above. It works best for businesses already using Microsoft 365. If you aren’t, the move takes more work. Like any cloud system, it needs a reliable internet connection and careful setup.
Features Your Phone System Should Include
When comparing phone systems, look beyond basic calling:
- Auto attendant: routes callers to the right department without tying up a receptionist, for example “Press 1 for Sales, press 2 for Accounts, press 3 for Support.”
- Hunt groups: spread incoming calls across several staff automatically. Useful for medical centres, professional services firms, customer service teams and multi-site businesses.
- Call recording: for training, compliance, customer service reviews and quality checks.
- Voicemail to email: messages land in your inbox, so there’s no handset to check.
- Mobile apps and softphones: staff use their business extension on a smartphone, tablet or computer. See how softphones work.
- Microsoft Teams integration: calls, video meetings, chat and collaboration in one app.
Newer Features Worth Considering in 2026
Phone systems have moved well past “press 1 for sales”. If you’re choosing a system this year, ask whether these are available:
- AI call answering. An AI receptionist can answer your main line after hours or around the clock, handle common questions, take messages and route callers to the right person.
- Call transcription and summaries. Calls can be transcribed automatically so you can search what was said instead of replaying a recording. Our Recap AI call summaries send the key points after each call.
- Business messaging in one place. Some platforms handle SMS and WhatsApp alongside voice, so your team replies from the business number, not a personal mobile.
- Passwordless and single sign-on. Staff sign in with a fingerprint, their face, or the Microsoft or Google login they already use, which means one less password to manage.
- Live dashboards for busy teams. For a reception desk or support line, look for wallboards showing calls waiting and staff available, automatic callbacks so customers aren’t left on hold, and reports you can export to a spreadsheet.
Not every business needs all of these on day one. A system that can switch them on as you grow is a safer long-term choice than one you’ll outgrow.
Cloud Phone Systems for Small Business
Cloud phone systems suit small businesses too, even with one or two staff. They give a small team:
- Professional phone numbers
- Mobile apps
- Call routing
- Voicemail management
- Business continuity
A small business can present a professional image without the cost or complexity of traditional phone equipment.
Questions to Ask Before You Choose
- How many users do we have today, and how many in 12 to 24 months? Plan for where you’re heading, not just where you are.
- Do employees work remotely? If so, mobile and softphone apps become essential.
- How many incoming calls do we receive? Higher call volumes usually need hunt groups and call queues.
- Do we operate from more than one location? Cloud systems are usually the simplest to manage across sites.
- Do we use Microsoft 365? If so, Teams Calling may fit the way you already work.
- Do we need call recording or reporting? Both help with management and compliance.
- Are we replacing an older system? Read what to consider when upgrading your phone system.
How Databox Solutions Can Help
We design business phone systems around the way each business works, from our offices in Brisbane and Melbourne. That can include:
- Cloud phone systems and hosted VoIP
- Microsoft Teams Calling
- Softphones and mobile apps
- Call recording
- 1300 numbers
- Multi-site phone systems
- Business internet
- Australian-based support
Whether you have one office, several sites or a hybrid team, ask us for a tailored quote, or take our 60-second phone system quiz.
