Microsoft Teams Phone vs Hosted PBX: An AU Guide 2026

If you're already paying for Microsoft 365, the phone decision often looks simple at first. Your staff already chat in Teams, run meetings there, and share files there. The old PBX is clunky, remote staff are forwarding calls to mobiles, and someone in the office still knows which extension only works if you tap the handset twice.

That's when Microsoft Teams Phone starts to look like the obvious next step. Keep everything in one ecosystem. One login. One interface. One vendor stack.

For some Australian businesses, that works well. For others, it creates a more expensive and awkward setup than expected. The difference usually comes down to how your business handles calls every day. Reception, transfers, shared handsets, remote offices, after-hours routing, porting old numbers, training less technical staff, and getting support fast when inbound calls stop ringing.

If you're still weighing VoIP against legacy services more broadly, this practical guide to VoIP and landline phone systems is a useful starting point before you choose the platform itself.

The Modern Phone System Dilemma

A common small-business scenario goes like this. You've got a head office, maybe a second site, a few people working from home, and most of the team already live inside Microsoft 365. Teams handles internal chat well. Meetings are fine. Calendars are shared. On paper, adding telephony seems like a tidy upgrade.

Then the operational questions start.

Can reception still see who's available and transfer calls quickly? Can the warehouse keep a physical handset? Can the sales manager answer on laptop, mobile, or desk phone without calls going missing? Can after-hours calls route one way on Fridays and another way on public holidays? Can you keep your existing business numbers without drama?

Those questions matter more than the feature brochure.

Teams Phone is strong when the workforce is app-first and happy to work inside Microsoft's way of doing things. A Hosted PBX tends to suit businesses that still need traditional phone behaviour, more flexible hardware, and simpler local support. That distinction gets sharper in Australia, where multi-site operations, hybrid work, and local service expectations often expose the gap between a collaboration add-on and a purpose-built phone system.

The wrong phone system usually doesn't fail on launch day. It fails three months later, when staff start creating workarounds for transfers, queues, and handsets that no longer fit the way the business runs.

Understanding Your Two Main Options

Most buyers compare features first. That's usually the wrong starting point. The better question is this: what is the system designed to do as its primary job?

Microsoft Teams Phone as a collaboration-led phone system

Microsoft Teams has scale. It reached 320 million monthly active users in 2024, up from 300 million in 2022 and 20 million in November 2019, according to Business of Apps' Microsoft Teams statistics. The same analysis estimated 80 million Teams Phone users, but only about 20 million Teams Phone System subscriptions with PSTN access. That gap matters. It shows many businesses use Teams heavily for internal collaboration, but external business calling is still a separate decision.

That's the key lens for Teams Phone. It isn't a standalone phone product first. It's a telephony layer added onto a collaboration platform.

If your staff already work in Teams all day, that can be attractive. Calls, meetings, chat, and presence sit in one environment. For businesses with simple call flows, minimal handset dependency, and internal Microsoft capability, that consolidation can reduce tool sprawl.

If your business also relies on satellite or regional internet options, this SwiftNet Wifi Starlink phone guide is worth reading because calling quality and continuity still depend on the access network underneath the platform.

Hosted PBX as a voice-first business system

Hosted PBX starts from a different premise. Its core job is telephony. Not chat. Not document collaboration. Not being an extension of a broader productivity suite. It's built to answer, route, transfer, queue, and manage business calls reliably.

That changes the buying logic. Instead of asking whether the phone system integrates neatly into Microsoft, you ask whether it fits the way your business handles inbound and outbound calls right now.

Hosted PBX often makes more sense when you need:

• Physical phone flexibility for reception desks, common areas, warehouses, and managers who prefer a handset

• Traditional call handling such as day/night modes, hunt groups, queue logic, and simpler extension behaviour

• Single-provider accountability for telephony, support, number hosting, and rollout help

• Cleaner commercial structure with fewer moving parts to understand before go-live

If you want a deeper baseline comparison before narrowing your shortlist, this article on Hosted PBX vs traditional PBX gives helpful context.

Comparing Call Management and Advanced Features

The day-to-day question isn't whether Microsoft Teams Phone has features. It does. The practical question is whether those features map cleanly to the way your business already handles calls.

Feature	Microsoft Teams Phone	Hosted PBX
Core call handling	Includes call queues, auto attendants, call forwarding, simultaneous ring, busy-on-busy, voicemail to Exchange email, and presence-based routing	Usually built around business telephony from the start, with common support for queueing, receptionist flows, extensions, voicemail, and time-based routing
Best fit	App-first users already centred on Teams	Businesses that need phones to behave like phones first
Call routing style	Strong for standard Microsoft-based workflows and admin-managed routing	Often stronger for practical multi-site routing and traditional PBX behaviour
Desk phone flexibility	Best experience typically comes from Teams-certified devices	Commonly supports SIP-compatible handsets and mixed device estates
Support model	Often shared between Microsoft, partner, and carrier paths depending on setup	Usually one provider owns provisioning, numbers, support, and call path
Commercial model	Can involve layered licensing and connectivity choices	Often simpler bundled monthly pricing

Call routing in the real world

Microsoft Teams Phone includes call queues, auto attendants, call forwarding, simultaneous ring, busy-on-busy, voicemail delivered to Exchange as email, and presence-based call routing, as outlined in Microsoft Learn's Phone System feature guide. That's a solid PBX base.

For a straightforward office, that may be enough. A main number rings reception, overflow goes to a small group, staff use the app on laptop and mobile, and voicemail lands in email. No issue there.

The friction usually appears in mixed environments. Multi-site transfers. Shared front-desk coverage. Staff who hot-desk informally. A manager who wants calls on mobile first, then assistant, then voicemail. A warehouse handset that must always ring even when the assigned user is in a meeting. Those aren't exotic requests. They're normal small-business requests.

Practical rule: if your call flow has to reflect the way your office actually operates, not just the way software expects users to behave, test the routing design before you sign anything.

For businesses that rely heavily on inbound treatment, this guide to advanced inbound routing with auto day night modes highlights the sort of routing behaviour many owners assume is standard until they try to reproduce it elsewhere.

User experience for reception, managers, and remote staff

Teams Phone is strongest when users are comfortable living inside the Teams client. Click-to-call, directory lookup, device switching, and presence can work well. Microsoft also notes useful operational features such as direct caller identification from the corporate directory and device switching during calls in the same feature set.

That's attractive for deskless or mobile staff. It's less attractive when the office still runs on visible buttons, fast blind transfer habits, and physical handsets sitting where people expect them.

A receptionist usually values speed and certainty over elegance. They want to know which line is ringing, whether someone is free, and how to transfer without hunting through the screen. A warehouse supervisor may want a durable handset on the desk, not another softphone tab. A director may want both.

Hosted PBX platforms tend to accommodate that mix more naturally because they grew out of telephony expectations, not team collaboration expectations.

Advanced workflows and where Teams Phone can feel thin

Teams Phone can be a good business phone system. It is not automatically the best fit for every call-heavy environment. Microsoft positions it as a PBX replacement, but the suitability question gets sharper when queues, frontline staff, and more complex voice workflows are involved.

That's where businesses often start looking beyond the native layer and into add-ons, integrations, or process compromises. If your team also wants stronger alignment between Microsoft 365 tools and daily communication habits, this article on effective communication workflows in M365 is a useful companion read.

If your phone system needs to mimic a legacy PBX closely, Teams Phone can do part of the job well and still leave awkward gaps around shared lines, handset behaviour, and queue expectations.

Hardware Compatibility and Local Support

A phone system decision isn't only about software. It's also about what sits on desks, who uses it, and who fixes issues when something breaks.

That's where many Microsoft Teams Phone projects become more complicated than buyers expected.

The handset question most businesses ask too late

If your team is happy on laptops, mobiles, and headsets, Teams Phone is easier to justify. If your business still depends on desk phones, common-area devices, or a mix of old and new hardware, the project needs more care.

Teams works best with Teams-certified devices. This isn't a fundamental flaw. Certified hardware exists for handsets, headsets, and conference rooms. The issue is flexibility. Businesses with existing SIP handsets often discover that reuse isn't as simple as hoped. Analogue devices, gate intercoms, fax replacements, and specialty endpoints may need adapters, gateways, or redesign.

Hosted PBX is usually more forgiving here because SIP compatibility is the norm. That gives you broader device choice and often makes staged migration easier. You can keep some handsets, replace others, and match device quality to the role. A receptionist might get a higher-end desk phone. A back-office user might just use a softphone. A warehouse might keep a basic durable handset.

Support in Australia isn't a minor detail

When phones stop working, the business doesn't care whose platform layer caused it. Staff just need the issue fixed.

With Teams Phone, support responsibility can spread across Microsoft licensing, the Teams admin setup, number provisioning, and the connectivity method used for PSTN calling. Even when the platform is sound, troubleshooting can become a coordination exercise.

With a specialist Hosted PBX provider, support is often simpler because one team handles the telephony outcome end to end. That matters for small businesses without internal telecoms expertise.

Resilience and outage behaviour

Microsoft describes Teams Phone as supporting VoIP and PSTN calling with AI-optimised reliability, survivability, and performance, plus automatic audio and video quality adjustment and Survivable Branch Appliance support for continuity when internet access is unavailable on its Teams Phone product page.

That's meaningful for hybrid Australian offices, especially outside capital-city CBD environments where access links can be less predictable.

But resilience on paper and resilience in operation aren't always the same thing. Survivable Branch Appliance support can help, yet it also adds another planning layer. By contrast, many Hosted PBX buyers prefer a provider-managed model where the telco handles continuity design, handset advice, and failover behaviour as part of the service rather than as a separate architecture exercise.

A resilient phone system isn't just one that has backup features. It's one your team understands before the outage happens.

Analysing Costs and Licensing Models

Teams Phone often wins the first conversation on cost because the business already owns Microsoft 365. That logic is understandable, but incomplete.

The actual cost question is not “do we already have Teams?” It's “what do we need to add before Teams can replace our phone system properly?”

Why Teams Phone pricing can feel hidden

Microsoft's own documentation states that to see the Voice option in the Teams admin centre, an organisation must buy at least one Enterprise E5 or E3 licence, one Phone System add-on licence, or one Audio Conferencing add-on licence, as shown in Microsoft's phone number and licensing guidance. That matters because it confirms Teams Phone works as an add-on model, not a standalone PSTN service.

The same documentation also shows how number allocation is calculated. For Domestic Calling Plan or International Calling Plan licences, available phone numbers are calculated as 1.1 times the subscriber count plus 10 extra numbers. It also states that for 1 to 25 Teams Phone and or Audio Conferencing licences, Microsoft provides 5 toll service numbers. Microsoft's example shows a tenant with 50 users across calling-plan types being able to acquire 63 phone numbers.

Those rules aren't a problem by themselves. They just tell you this is a licensing design exercise, not a simple “switch on phones” exercise.

Here's the embedded overview many buyers watch early in the process:

https://www.youtube.com/watch?v=wTk9xzP2w7A

Hosted PBX usually wins on pricing clarity

Hosted PBX is often easier to budget because the service is sold as a phone system first. In many cases, the monthly fee covers the core platform, call features, calling inclusions, support, and number hosting in one commercial structure.

That simplicity has real operational value. Office managers can forecast costs. Owners can compare providers without decoding multiple Microsoft licence dependencies. New users are easier to price. Moves, adds, and changes are less likely to trigger a licensing rabbit hole.

Total cost means more than licence cost

The monthly licence line item is only one part of the spend.

Look at the whole stack:

• Licensing overhead if Teams Phone requires additional Microsoft components or a more complex subscription mix

• Hardware replacement if current handsets aren't suitable

• Implementation effort if your routing setup is non-standard

• Training time for reception, admin staff, and less technical users

• Support burden when multiple vendors share responsibility

If your business values predictable spend and low admin overhead, Hosted PBX often comes out ahead even before you compare handset flexibility and local support.

Navigating Migration and Number Porting

Migration scares a lot of business owners for one reason. They don't care about the technical elegance of the cutover. They care about whether customers can still call the business on Monday morning.

That's the right priority.

Start with the call flow, not the platform

Before porting any numbers, map what happens to calls today. Which numbers are published? Which ones still matter but rarely ring? Who answers first? What happens at lunch, after hours, during leave, or when one office is closed and another is open?

This matters even more if you're moving to Teams Phone. Microsoft's guidance around unassigned number routing, admin centre configuration, and PowerShell is useful, but it's still admin-led and technical. For many small businesses, the bigger issue is practical design: how to preserve key behaviours while simplifying the mess that has built up over time.

Clean migrations happen when you remove bad legacy habits deliberately. Bad migrations happen when you recreate every old quirk by accident.

What a sensible migration process looks like

A low-drama migration usually includes these checks:

• Number ownership check. Confirm exactly who holds each business number and which services are attached to them.

• Call flow review. Decide what must stay, what can be simplified, and what should be redesigned.

• Network readiness. Test whether your current internet setup can support dependable voice quality across sites and remote users.

• User grouping. Separate reception, managers, mobile staff, shared devices, and occasional users because they rarely need the same setup.

• Pilot rollout. Move a small group first if the environment is complex.

• Training before cutover. Reception and power users should know transfer, pickup, voicemail, mobile use, and fallback steps before the numbers go live.

The local-provider difference

A specialised provider often adds the most value during migration, not after it. Number porting, temporary diversions, handset staging, and user training are all easier when one local team owns the process.

That's especially relevant in Australia, where small businesses often need someone to translate telecom jargon into operational decisions. If your business still has legacy PBX behaviour, mixed handsets, or numbers spread across old carriers, practical migration support can be worth more than an extra feature list.

Making the Right Choice for Your Business

Microsoft Teams Phone makes sense when your team already works almost entirely inside Teams, prefers softphones over desk phones, and has relatively straightforward calling needs. It's a logical option for businesses that want telephony folded into their Microsoft environment and are comfortable planning around Microsoft licensing and device choices.

Hosted PBX usually makes more sense when calls are central to daily operations. That includes businesses with reception-heavy workflows, multiple sites, shared handsets, remote offices, more traditional call handling expectations, or owners who want one Australian provider to handle setup, support, and number management.

The decision usually comes down to a short checklist.

Ask these questions before you commit

• How important are desk phones? If handsets still matter, check device compatibility early.

• How complex is inbound routing? If your business uses day/night modes, queues, overflow rules, and multi-site logic, test those scenarios in detail.

• Who will support it? If something fails, do you want to manage multiple vendors or call one local provider?

• How predictable must the monthly spend be? Simple commercial structures are often easier to live with than layered ones.

• How technical is your team? App-first businesses adapt faster. Traditional office teams often need a more familiar phone experience.

If you want one practical rule, use this one. Choose the system that fits how your staff already answer and transfer calls, not the one that looks neatest on an architecture diagram.

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If you want help comparing Microsoft Teams Phone with a more flexible small-business alternative, Hosted Telecommunications can walk you through the practical differences. Their Australian-based team helps businesses choose, install, port numbers, and support Hosted PBX solutions with Yealink handsets, softphones, and call routing that suits real offices, remote staff, and multi-site operations.