What is a cloud-based phone system for business?

A complete guide for Microsoft Teams users, including omnichannel and CRM integration.

The term “cloud-based phone system” gets thrown around a lot in business circles, often alongside jargon like VoIP, Hosted PBX, and Unified Communications. But if your organisation already uses Microsoft Teams for chat and video meetings, you might be wondering: can Teams replace our traditional desk phones? And what about other ways our customers actually contact us, like WhatsApp and SMS?

In this article, I’ll look at common “what,” “how,” “why,” and “should I” questions, with a specific focus on using Microsoft Teams as the single pane of glass for all your business communication.

The simple definition: What are we talking about?

A cloud-based phone system is a communication service that lets you make and receive calls over the internet rather than traditional copper-wire landlines. Unlike a legacy system that requires a physical Private Branch Exchange (PBX) box installed in your office cupboard, all the switching, routing, and data storage happens off-site in secure data centres managed by a service provider.

Microsoft calls its cloud-based phone solution Microsoft Teams Phone. It’s an add-on to the Teams platform that provides a fully capable business phone system, enabling internal calls and calls to and from the public switched telephone network (PSTN). In other words, regular phone numbers outside your organisation.

Beyond voice to a ‘single pane of glass’

Traditionally, businesses used separate apps for voice calls (desk phone), text messages (personal mobile), WhatsApp (personal app), and customer records (CRM software). That creates ‘app fatigue’ and data silos.

Microsoft’s cloud phone system consolidates everything into a single pane of glass within Microsoft Teams. This means:

• Voice calls: Incoming and outgoing PSTN calls appear in Teams.
• SMS/MMS: You can send and receive business text messages directly from the Teams chat window, not your personal phone.
• WhatsApp Business: Customer messages from WhatsApp appear as chat threads right next to your Teams channels. You reply using a keyboard, share files, and maintain conversation history, all without opening WhatsApp Web in a separate browser.
• CRM integration: When a call or message comes in, the system instantly searches your CRM (like Salesforce, HubSpot, or Dynamics 365). A pop-up window shows you the customer’s entire history and account value before you even answer.

How does Teams Phone actually work with these integrations?

Here’s the step-by-step process for an omnichannel interaction:

1. Inbound contact: A customer sends a WhatsApp message to your main business number or clicks “Call Us” on your website.
2. Voice-to-data and routing: The voice (or text) is converted into data packets and sent to Microsoft’s data centres. Advanced routing rules, often configured by a specialist such as Algiz partner SCB Global, determine who’s available to handle that specific channel (Voice, SMS, or WhatsApp).
3. The single pane popup: The Teams interface rings. At the same time, an integration layer checks the customer’s phone number against your CRM. A card pops up in Teams showing: ‘John Smith | VIP Client | Open Support Ticket #4523 | Last purchase: £1,200.’
4. Interaction: You answer the call (or reply to the WhatsApp text) within Teams. The call’s logged automatically in the CRM, and the WhatsApp conversation thread’s saved for compliance.
5. Resolution: After the call, you can send a follow-up SMS receipt or a WhatsApp tracking link, all from the same Teams window, without switching tools.

What features does an integrated Teams Phone system include?

One of the biggest advantages of using Teams as your phone system is the ability to unlock enterprise-grade features. Here’s what the system includes, broken down by traditional telephony and the new omnichannel layer:

Core communication tools:

• Auto-attendant: An automated voice menu that greets and routes callers (“Press 1 for Sales, 2 for Support”) without a human operator.
• Call queues: Place callers in a virtual waiting line until someone is free to answer.
• Voicemail: Cloud-based voicemail with transcriptions delivered to your inbox.

Advanced omnichannel capabilities (enabled by partners like SCB Global):

• WhatsApp Business integration: Engage customers on the world’s most popular messaging app directly within the Teams client. This includes support for rich media (images, PDFs, location sharing) and templates for marketing blasts.
• SMS & MMS in Teams: Send and receive text messages using your landline or toll-free number. This eliminates the need for employees to use personal mobile phones for work texts, improving compliance and record-keeping.
• CRM screen pop-ups for Click-to-Dial: Deep integration with major CRMs enables automatic data retrieval and logging. Users can click a phone number inside the CRM to dial instantly via Teams.
• Unified reporting: See analytics for all channels in one dashboard. How many calls were answered? What’s the average response time on WhatsApp? What’s the sentiment score of today’s SMS exchanges?

How does licensing and pricing work with add-on integrations?

Understanding the licensing structure’s crucial. Here’s how the stack typically looks when adding SMS and WhatsApp:

Microsoft Teams	The core app for chat, video meetings, and internal calling.	Included in most Microsoft 365 Business and Enterprise plans (E3, E5, etc.).
Teams Phone Standard	Activates the PBX features (auto-attendant, call queues, voicemail).	Included with Microsoft 365 E5 or available as an add-on for E3.
PSTN Connectivity	This is what lets you dial external phone numbers.	Microsoft Calling Plan, Operator Connect, or Direct Routing.
Omnichannel Connector	This is where SCB Global fits in.	A third-party service that bridges WhatsApp/SMS APIs into the Teams chat protocol. These are typically monthly per-user or per-message fees.

What’s the total cost? You’re paying Microsoft for the ‘Phone System’ licence and the minutes, and you’re paying a specialist provider like SCB Global for the software licence that enables WhatsApp and SMS to appear inside Teams. That’s often more cost-effective than buying a separate, standalone Contact Centre platform.

Cloud vs. traditional PBX vs. disconnected apps: What’s the difference?

If you’ve been using separate apps for years, here’s a clear comparison to highlight what changes when you move to a Single Pane of Glass approach:

User Experience	Single Application: Teams handles voice, video, SMS, and WhatsApp. No alt-tabbing.	Fragmented: Desk phone for calls, personal phone for texts, WhatsApp Web in a browser.
CRM Data	Automatic: Screen pop shows caller history from Salesforce before you answer.	Manual: Employee must stop, open CRM, search for the number, then answer the call.
Compliance & Security	Centralized: All SMS and WhatsApp conversations are logged and auditable in the cloud.	Shadow IT: Conversations happen on personal devices with no company visibility or backup.
Efficiency	High: Click-to-call from CRM; copy/paste tracking numbers from system to WhatsApp chat in seconds.	Low: Copying numbers between apps; retyping information.
Cost	Predictable OpEx: Pay for Teams license + integration license.	Hidden Costs: Lost productivity due to app switching; risk of non-compliance fines.

What hardware can I use with Teams Phone?

You’ve got flexibility when it comes to devices. The best choice depends on employee workstyles:

• Headsets: The most common choice for hybrid workers. Microsoft-certified headsets ensure optimal audio quality and feature a dedicated Teams button for answering calls and joining meetings.
• Teams desk phones: For employees who prefer a traditional handset. Options include native touch phones (Android-based with a full Teams interface) and video-calling phones.
• Mobile devices: The Teams mobile app for iOS and Android allows employees to make and receive business calls and now reply to business WhatsApp/SMS messages while keeping their personal number private.

Is Teams Phone secure and reliable with third-party integrations?

Security is paramount, especially when adding channels like WhatsApp. SCB Global and similar certified partners operate within Microsoft’s secure ecosystem. They use Microsoft Azure Active Directory for authentication, meaning the integration does not bypass your company’s security policies.

Data for WhatsApp and SMS is encrypted in transit and at rest. Crucially, because the interaction happens inside Teams, it falls under the same eDiscovery, Legal Hold, and Retention Policies that your compliance team has already configured for email and chat. That’s a massive advantage over employees using WhatsApp on personal phones.

What questions should I ask before switching to an integrated Teams Phone system?

Before migrating, use this checklist to vet your readiness and avoid hidden pitfalls:

• Omnichannel licensing: “How does the provider charge for WhatsApp and SMS? Is it per user, per conversation, or per message segment?”
• WhatsApp Business approval: “What is the process for getting our business verified on the WhatsApp Business platform? Does the provider assist with this?”
• CRM integration depth: “Will the integration support custom fields from my specific CRM? Will it log the full text of WhatsApp messages, or just a notification?”
• Number porting: “Can we use our existing landline number for SMS as well?” (Yes, numbers can be “text-enabled”).
• User training: “How intuitive is it for staff to switch from phone calls to WhatsApp chats mid-conversation? Is training provided?”
• Support: “If a WhatsApp message fails to send in Teams, who do we call, Microsoft or the integration partner?”

Conclusion: Should you switch to a single pane of glass?

A cloud-based phone system represents the modern standard for business communication. However, for many businesses, voice is no longer enough. Customers expect to message you the same way they message their friends and family, via WhatsApp and SMS.

By combining Microsoft Teams Phone with an omnichannel solution from a provider like SCB Global, you achieve the holy grail of business communication: a single pane of glass. You eliminate app switching, automatically capture all customer interactions in the CRM, and ensure compliance across every channel. If your business values efficiency and a seamless customer experience, this integrated approach isn’t just an upgrade; it’s the new standard.