Microsoft Teams

Microsoft Teams Phone is the enterprise telephony component of Microsoft Teams — the collaboration platform used by more than 270 million people worldwide. Headquartered in Redmond, Washington and trading on NASDAQ as MSFT, Microsoft is one of the largest technology companies in history, with approximately 228,000 employees and Azure cloud infrastructure spanning 60+ regions globally.

Three Paths to PSTN

Microsoft Teams Phone offers three distinct connectivity models, making it uniquely flexible among UCaaS platforms:

1. Microsoft Calling Plans — Microsoft acts as the carrier; organizations purchase PSTN minutes directly from Microsoft, available in 35+ countries

2. Operator Connect — Microsoft-certified carriers provide PSTN connectivity through a managed API integration without complex SBC configuration

3. Direct Routing — Any SIP-capable carrier or organization with on-premises infrastructure can provide PSTN connectivity through Session Border Controllers

This flexibility means Microsoft Teams Phone adapts to virtually any existing carrier relationship or infrastructure investment.

Microsoft 365 Synergy

For organizations already licensed for Microsoft 365, adding Teams Phone licenses represents the lowest-friction path to cloud voice available in the market. Calls, meetings, chat, file collaboration, and business applications (Dynamics, Power Platform, SharePoint) share a single interface, eliminating context switching and reducing the total number of applications employees must manage.

Enterprise Compliance and Security

Microsoft Teams meets an exceptional range of compliance certifications: FedRAMP High, DoD IL2-IL4, StateRAMP, HIPAA BAA, SOC 2 Type II, ISO 27001, and more. For regulated industries and government organizations, this compliance posture is difficult to match across the UCaaS landscape.

Copilot AI

Microsoft's integration of Copilot AI throughout Teams — including real-time meeting transcription, translation, intelligent recap, next-action suggestions, and voice intelligence — represents the most ambitious and natively integrated AI investment in enterprise communications of any provider in this catalog.