Differences in Microsoft Teams Telephony: Calling Plan, Operator Connect, or Direct Routing?

The world of work is hybrid, and Microsoft Teams is the digital headquarters for many companies. But while chatting and internal meetings usually work smoothly, when it comes to “landline calls” (PSTN), you often ask yourself a crucial question: How do the phone numbers actually get into the app? Microsoft offers three main ways to do this. The choice between Calling Plan, Operator Connect, and Direct Routing determines how flexible, cost-effective, and maintenance-intensive your telephony solution will ultimately be. In this guide, we shed some light on the subject and show you the differences between Microsoft Teams telephony options.

1. Microsoft Calling Plan: The All-Inclusive Service

If you like things to be extremely simple, the Calling Plan is the answer. Here, Microsoft itself acts as your telephone provider. You don’t need to sign any contracts with third-party providers.

• How it works: You purchase licenses (Teams Phone + Calling Plan), select your numbers directly in the Teams Admin Center, or port existing numbers there.
• Advantages: It’s the fastest method. Your employees will be up and running in a matter of minutes. You can manage everything centrally in one place.
• Limitations: Availability varies by region, and the cost per user is often fixed. In addition, you don’t have any in-depth integration options for existing hardware.

2. Operator Connect: The Happy Medium – With a Catch for SMEs

Want to stay with your trusted phone provider but don’t want to manage your own hardware? Then Operator Connect is an option. Here, you select a Microsoft-certified provider (known as an operator, e.g., Swisscom, Vodafone, etc.) directly from a list in the Teams Admin Center.

• How it works: Your chosen provider takes care of all the technology and lines in the background. As soon as they release the numbers, they automatically appear in your Teams portal for assignment.
• Advantages: You benefit from the direct connection and expertise of large network operators via “plug-and-play.”
• The catch for SMEs: The large providers reserve their flexible additional services – such as the integration of special hardware – almost exclusively for enterprise customers with 250 or more employees. As an SME, you usually only get a rigid standard product with no room for individual customization.

3. Direct Routing: Maximum Freedom (Our Recommendation for SMEs)

Direct routing is the “Swiss Army knife” of team telephony. It allows you to connect to any telephone provider worldwide. To do this, you connect a so-called session border controller (SBC) to Microsoft Teams.

• How it works: A certified SBC bridges the gap between your provider and the Microsoft Cloud. It manages the voice packets and ensures security.
• Advantages: Maximum control. You can continue to use existing contracts, integrate analog devices (such as fax machines or door intercoms), and map complex call center structures.
• The TwinCap First solution: Many SMEs shy away from direct routing because they are reluctant to operate their own SBC. This is where we come in: While large providers (operators) only become flexible for 250 or more users, we at TwinCap First offer you, as an SME, exactly these enterprise services. We operate our own SBC as a managed service. This gives you full flexibility, allows you to seamlessly integrate your hardware, and lets you benefit from customized solutions – without having to manage the technical complexity yourself.

A Direct Comparison Between Calling Plan, Operator Connect, and Direct Routing for Microsoft Teams Telephony

To make your decision easier, we have compared the most important features of the three options for your Microsoft Teams telephony. Here you can see at a glance where the differences lie for Microsoft Teams telephony in terms of flexibility, hardware, and support – and why our solution makes the decisive difference, especially for SMEs:

Feature	Calling Plan	Operator Connect	Direct Routing (TwinCap First)
Provider	Microsoft	Certified Operator	Free Choice (BYOC)
Infrastruktur	None (Cloud)	Managed by Operator	Managed SBC by us
Hardware-Einbindung	No	Usually only for > 250 users	Yes, full SME support
Flexibilität	Low	Medium (fixed for SMEs)	Maximum (Analog, PBX, Fax)
Ideal für…	Small Teams	Medium-Sized Companies	Demanding SMEs

The Licensing Question: What Do You Really Need?

No matter which option you choose, every user needs a Teams Phone license (often included in Microsoft 365 E5 or available as an add-on).

Important: You only pay Microsoft for minute packages with the Calling Plan. With the TwinCap First solution, you use your existing, often significantly cheaper trunk conditions from your operator.

Can You Mix Options?

Absolutely! That’s one of the greatest strengths of Teams. For example, you can use our Direct Routing for your headquarters in Switzerland to cover local special requirements, while a small branch office abroad makes calls via the Calling Plan. Everything remains controllable within the same system.

Which Option Is Right for You? Your Path to Microsoft Teams Telephony

The decision depends on your technical requirements and your desire for independence:

1. Choose the Calling Plan if you are looking for a quick solution without any extra requirements in supported countries.
2. Choose Operator Connect if you are looking for a standard setup with a listed operator and do not need to integrate any hardware.
3. Choose Direct Routing with TwinCap First if you are an SME and don’t want to compromise. We offer you the flexibility of an enterprise solution tailored to the size of your company.

Would you like to know how Direct Routing can simplify your communications? Contact us for a no-obligation consultation – we’ll show you how to get the most out of your Microsoft Teams telephony.