The traditional office phone system no longer fits the way modern businesses operate.
Today’s teams work across offices, homes, and multiple locations. Customers expect fast responses, seamless transfers, and professional communication wherever your employees happen to be working. As a result, more organisations are moving away from legacy phone systems and adopting cloud-based communication platforms.
But with several options available including VoIP, Hosted PBX and Microsoft Teams Calling – choosing the right approach isn’t always straightforward. While VoIP refers to the underlying technology that enables internet-based calling, Hosted PBX and Teams Calling are platforms that use that technology to deliver a full business phone system with call management features.
Each option offers different strengths depending on how your business operates, how your teams communicate, and which tools you already rely on. Some organisations prioritise flexibility and mobility, while others need advanced call management, integrations, or a fully unified communications platform.
In this guide, we break down how each solution works, the key differences between them, and how to decide which one best fits your business.
Why Choosing the Right Phone System Matters More Than Ever
Business communication has changed dramatically over the last decade. Hybrid working, mobile teams, and global collaboration mean companies need flexible systems that work anywhere.
A modern phone system should:
- Support remote and hybrid workers
- Integrate with business software
- Scale easily as your company grows
- Provide high call quality and reliability
- Offer strong security and compliance
Choosing the wrong system can create limitations, while the right one can streamline communication and support future growth.
What Is VoIP?
VoIP (Voice over Internet Protocol) allows businesses to make and receive calls using an internet connection instead of traditional telephone lines.
Calls are transmitted digitally over your network, meaning users can make calls from desk phones, laptops, or mobile apps.
Modern VoIP services are typically delivered through cloud platforms and are offered on a per-user monthly subscription model, typically including a wide range of built-in calling features
Common VoIP capabilities include:
- Call forwarding and call routing
- Voicemail and voicemail-to-email
- Call recording
- Auto attendants
- Softphone and mobile apps
- Integration with business tools
Key benefits of VoIP include:
- Lower infrastructure costs compared to traditional phone systems
- Flexibility to make and receive calls from multiple devices
- Easy scalability as users are added or removed
- Support for modern business calling features
Many VoIP services provide feature-rich calling functionality as part of the standard package, though the exact capabilities and management tools will vary slightly depending on the provider.
What Is a Hosted PBX?
A Hosted PBX (Private Branch Exchange) is a cloud-based phone system managed by a service provider rather than installed on-site.
Instead of maintaining physical hardware in your office, the PBX platform runs in the cloud, allowing your provider to manage updates, maintenance, and infrastructure.
Like VoIP services, Hosted PBX platforms are typically delivered on a price-per-user subscription model and include a wide range of built-in calling and call management features.
Typical Hosted PBX features include:
- Auto attendants and IVR menus
- Call routing and hunt groups
- Voicemail and call recording
- Business continuity and disaster recovery
- Support for desk phones and softphones
- Call reporting and analytics
Because Hosted PBX systems are cloud-based, they also provide many of the same operational benefits as VoIP platforms, including:
- Lower infrastructure costs compared to traditional on-premise phone systems
- Flexibility to make and receive calls from multiple devices
- Easy scalability as users are added or removed
- Access to modern business calling features
In practice, VoIP and Hosted PBX solutions often provide very similar feature sets, with differences usually coming down to the provider platform, management tools, and how the service is packaged.
What Is Microsoft Teams Calling?
Microsoft Teams Calling allows businesses to make and receive external phone calls directly within Teams using the platform’s calling capabilities.
It effectively turns Teams into your business phone system when combined with calling plans or a telephony provider.
Because Teams is part of the wider Microsoft collaboration ecosystem, it enables users to manage chat, meetings, file sharing, and voice calls from a single platform.
Typical Microsoft Teams Calling features include:
- Click-to-call directly from the Teams interface
- Integration with contacts and calendars
- Call forwarding, voicemail and call queues
- Auto attendants for managing incoming calls
- Calls from desktop, mobile, or Teams-enabled desk phones
- Integration with Microsoft 365 applications
Key benefits of Microsoft Teams Calling include:
- A single platform for chat, meetings, collaboration and voice calling
- Seamless integration with Microsoft 365 tools like Outlook and calendars
- The ability to make and receive calls from anywhere using the Teams app
- A familiar user experience for organisations already using Microsoft Teams
- Simplified communication workflows by switching between chat, meetings and calls in one interface
For businesses already using Teams heavily, this approach can simplify communications by bringing voice calling into the same platform employees use every day.
How Each System Handles Calls, Users and Devices
Although they rely on similar underlying technology, each option delivers communication in slightly different ways.
VoIP systems
- Support desk phones, mobile apps, and softphones
- Often rely on a VoIP platform or provider
- Users can log in from multiple devices
Hosted PBX
- Typically supports dedicated desk phones plus softphone apps
- Centralised call management and routing
- Strong administrative control
Teams Calling
- Primarily designed for app-based calling
- Desk phones are supported but usually Teams-certified devices
- Calls are managed through the Teams interface
The best option depends on whether your workforce prefers desk phones, mobile apps, or software-based calling.
Setup and Management: How Complex Is Each Option?
Deployment complexity can vary significantly.
VoIP
- Usually quick to deploy
- Requires device configuration and network readiness
- Often managed through a web portal
Hosted PBX
- Managed largely by the provider
- Setup involves provisioning phones and users
- Typically offers a structured admin system
Teams Calling
- Setup depends on your existing Microsoft environment
- Requires configuration within Microsoft 365
- Integration with telephony providers may be required
For companies already operating in the Microsoft ecosystem, Teams Calling can be relatively straightforward to adopt.
Flexibility for Hybrid and Remote Teams
Flexibility is now a critical requirement.
VoIP and Hosted PBX systems allow users to connect from virtually anywhere with internet access, using apps or physical phones.
Teams Calling takes this further by embedding calling directly within a collaboration platform many remote teams already use daily.
This means employees can move from chat to meeting to phone call without switching tools.
Call Quality, Reliability and Internet Dependency
All three systems rely on internet connectivity, so network quality is critical.
Factors affecting call quality include:
- Bandwidth availability
- Network stability
- Quality of service (QoS) settings
- Provider infrastructure
Hosted PBX providers often optimise their networks for voice traffic, while Teams Calling performance can depend more heavily on your organisation’s overall network configuration.
Reliable connectivity is essential regardless of which option you choose.
Security and Compliance Considerations
Business communications must be secure and compliant with industry regulations.
VoIP and Hosted PBX providers typically offer:
- Encrypted call traffic
- Secure authentication
- Call recording policies
- Compliance features
Teams Calling benefits from the security framework already built into Microsoft 365, including identity management and enterprise-grade security controls.
For regulated industries, security capabilities should always be evaluated carefully.
Integration With Business Tools and CRMs
Integration with other business systems can improve efficiency and customer experience.
Many VoIP and Hosted PBX systems integrate with popular CRM platforms such as Salesforce, enabling:
- Click-to-dial
- Automatic call logging
- Customer record access during calls
Teams Calling integrates tightly with the broader Microsoft ecosystem, including Outlook, SharePoint, and other Microsoft 365 applications.
The best option depends on which business tools your organisation already relies on.
Cost Comparison: What You’re Paying For
Costs vary depending on features, users, and provider pricing models.
VoIP
- Typically subscription-based per user
- Low upfront cost
- Pay for features and call usage
Hosted PBX
- Typically subscription-based per user
- Includes PBX features and support
- Minimal hardware investment
Teams Calling
- Requires Microsoft 365 licences
- Additional telephony or calling plan costs
- Potential integration costs
The most cost-effective solution often depends on your existing technology stack.
Which Option Works Best for Small Teams
Small businesses often prioritise simplicity and affordability.
VoIP solutions are typically a strong fit because they offer:
- Easy deployment
- Low monthly costs
- Flexible device support
- Essential calling features
Hosted PBX can also work well for small teams that want more structured call handling and professional features.
Which Option Suits Growing or Multi-Site Businesses
Growing organisations often require more advanced call management.
Hosted PBX systems are well suited for:
- Multi-site businesses
- Customer service teams
- Structured call routing
- Call reporting and analytics
Teams Calling can also be ideal for businesses already standardised on Microsoft tools and looking to consolidate communications into a single platform.
How to Choose the Right Telephony Setup for Your Business
Choosing the right phone system depends on several factors:
- Your existing technology environment
- The size and structure of your workforce
- Remote and hybrid working requirements
- Integration with business software
- Budget and scalability needs
VoIP provides flexibility and affordability, Hosted PBX delivers structured business telephony features, and Teams Calling offers a unified communications experience within the Microsoft ecosystem.
The right choice is the one that aligns with how your teams work today while supporting how your business plans to grow in the future.
Common Mistakes Businesses Make When Choosing a Phone System
With so many cloud communication options available, many businesses rush into choosing a phone system without fully understanding how it will support their long-term needs. Avoiding a few common mistakes can save time, money and disruption later.
Choosing based on price alone
Low-cost solutions can look attractive initially, but they may lack important features such as call routing, analytics, CRM integration or scalability. The cheapest option isn’t always the most cost-effective as your business grows.
Not considering how your team actually works
A system that works well for office-based teams may not suit remote or hybrid workers. It’s important to choose a platform that supports the way your employees communicate day-to-day – whether that’s through desk phones, mobile apps or collaboration platforms like Microsoft Teams.
Ignoring integrations with existing business tools
Your phone system should work alongside the tools your teams already rely on. Integrations with CRM systems, helpdesks and collaboration platforms can significantly improve productivity and customer experience.
Overlooking scalability
As your organisation grows, your communication needs will evolve. Choosing a system that can easily add users, locations and features will ensure your telephony setup supports future growth rather than limiting it.
Not assessing network readiness
Cloud-based calling depends on reliable connectivity. Before deploying VoIP or cloud telephony solutions, businesses should ensure their network and internet connection can support high-quality voice traffic.
Taking the time to assess these factors early can help businesses select a communication platform that supports both current needs and future growth.
Need Help Choosing the Right Business Phone System?
Choosing the right communication platform isn’t just about technology – it’s about supporting how your teams work and ensuring your customers can always reach you.
If you’re unsure whether VoIP, Hosted PBX or Microsoft Teams Calling is the right fit for your organisation, our team can help. We offer a no-obligation discovery call to understand how your business communicates today, what challenges you’re facing, and which solution will deliver the best performance, flexibility and value.
There’s no pressure, no hard sell and no jargon – just practical advice to help you choose the best telephony setup for your business.
