Ctelo Voice helps customers and partners succeed by making telephony a natural part of the Microsoft cloud ecosystem.

Ctelo Voice for Microsoft 365 Telephony is a cloud-based telephone service for Microsoft Teams that transforms Teams into a full business phone system. It gives every user a personal PSTN phone number directly in the Teams client, so employees can make and receive external calls in the same app they use for chat and meetings. With this solution, organizations eliminate separate PBX or mobile systems – telephony becomes a seamless part of the Microsoft 365 digital workplace. All calls are managed in the customer’s own Microsoft tenant (via Entra ID and Teams Admin Center), delivering easy administration, high security, and global scalability from day one. The service is operated by Ctelo inside Azure and delivered through your trusted Microsoft partner, providing a safe harbor for telecom transition—where Microsoft drives digitalization, you own your requirements, and your reseller leads the relationship, with Ctelo ensuring telephony becomes a natural part of your Microsoft 365 platform.

Key benefits and features include:

Quality-Assured Telephony: Delivered as a managed service by experts, ensuring reliability, compliance, and peace of mind for every organization.
Seamless Teams Experience: Users dial and receive calls natively in Microsoft Teams on any device, with all calling features (transfer, auto-attendant, call queues, voicemail) integrated. There’s no need for separate phone apps – one platform for all communication.
Easy Activation & Global Reach: Deploy telephony as a true SaaS: simply add the Ctelo Voice service to your tenant via Azure Marketplace, with no hardware or lengthy projects. The service is currently available in 140+ countries with compliance to local telecom regulations, so you can support offices worldwide from a single solution. Fixed fee per location, fast activation via Azure Marketplace.
Enterprise-Grade Control: Administer users and numbers in Entra ID/Teams Admin – your IT staff use familiar Microsoft 365 tools to manage telephony. When an employee leaves or changes roles, disabling their phone access is as simple as updating Azure AD. All call data stays under your existing compliance and security policies (e.g. audit logging in Microsoft 365)
Supports Operator Connect: Seamlessly integrates with Operator Connect for enhanced Microsoft support flexibility, and added Global Microsoft 365 Telephony reach.

Partner-Driven Delivery

Implemented and supported by Microsoft partners, not a telecom carrier. Your existing Microsoft reseller or integrator remains your front-line contact. Ctelo’s experts work behind the scenes to handle telecom integration (carrier connections, number porting) and 24/7 monitoring. This means you get telephony as a managed service with no disruption to your partner relationships – in fact, your partner can now include telephony in your Microsoft 365 projects without needing separate telecom expertise.

Future-Ready & AI-Enabled By moving all calls into Teams (and thus Azure), your organization is ready for AI and Copilot scenarios. Every phone conversation can be transcribed and analyzed alongside emails and chats, unlocking insights like AI-generated call summaries or sentiment analysis. Ctelo Voice makes telephony data available for Microsoft 365’s AI capabilities, so you can leverage tools like Microsoft Copilot to generate meeting notes from calls or suggest actions from customer conversations. In short, it’s a future-proof telephony solution built for the AI-powered workplace.

Globally Available

Ctelo Voice is a global cloud service available in the majority of countries around the world. Telecom regulations in some countries might be strict when it comes to connecting phone numbers to a service outside their boarders, but also these countries can be added to the Teams Phone experience with the Ctelo Voice Office Connect service.

Requirements

Users will need a Microsoft Teams Phone Standard License (included in A5/E5), a Ctelo Voice Standard License and a telecom agreement for fixed numbers.

Fixed Onboarding Fee

Onboarding is done at a fixed fee of EUR 695 per location. Invoicing of the onboarding fee and any additional consulting is handled directly by the executing party.

Get started

Click the blue Get It Now button above to order Ctelo Voice Standard licenses for your phone users and fill in the required information to get started.

Ctelo Voice for Microsoft 365 Telephony

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