GCC High Teams Calling Compliance: How Microsoft Teams Phone Meets CMMC, ITAR, and DFARS Requirements

If your organization uses a non-compliant VoIP or Teams Calling solution, you risk losing DoD contracts, incurring fines, and exposing sensitive data to security threats.

Government contractors face strict security and compliance regulations for handling Controlled Unclassified Information (CUI), but not all communication tools meet these standards.

In this post, we’ll break down GCC High Teams Calling Compliance, explore how Microsoft Teams Phone meets CMMC, ITAR, and DFARS requirements, and explain why Atlantech Online is the best choice for secure, compliant PSTN calling.

Understanding GCC High Teams Calling Compliance

What Is GCC High?

GCC High (Government Community Cloud High) is a specialized cloud environment built for U.S. federal agencies, defense contractors, and organizations handling export-controlled data.

• Hosted in U.S.-based, ITAR-compliant Microsoft data centers.
• Restricted to organizations that meet strict security vetting requirements.
• Meets DFARS 7012, ITAR, and CMMC 2.0 compliance mandates.
  
  

Why GCC High Teams Calling Is Different from Commercial Teams Calling

Standard Microsoft Teams Calling is not compliant for handling sensitive government data because:

• Data sovereignty risks – Commercial Teams stores call logs outside the U.S., violating ITAR regulations.
• Lack of required security features – Standard Teams Calling does not meet DFARS 7012 encryption mandates.
• No FedRAMP High certification – Commercial Teams does not meet the security standards required for CUI.
  
  

GCC High Teams Calling: Built for Compliance

• Encrypted calling & audio conferencing within GCC High.
• Meets strict DoD & federal security mandates, ensuring CMMC, ITAR, and DFARS compliance.
• Integrates seamlessly with Microsoft 365 GCC High applications, including Outlook, SharePoint, and Azure.
  
  

How Microsoft Teams Phone Meets CMMC, ITAR, and DFARS Compliance

CMMC 2.0 Compliance for Microsoft Teams Calling

CMMC (Cybersecurity Maturity Model Certification) 2.0 requires strict data security controls for DoD contractors handling CUI. Microsoft Teams Phone for GCC High meets CMMC Level 2+ security controls, including:

• End-to-end encryption for voice traffic (MS Teams to MS Teams calls only).
• Access control & monitoring to prevent unauthorized access.
• Secure call storage in FedRAMP High-compliant U.S. data centers.
  
  

ITAR Compliance for Microsoft Teams Calling

ITAR (International Traffic in Arms Regulations) mandates strict control over defense-related data, including voice communications. Microsoft Teams Phone for GCC High ensures ITAR compliance by:

• Storing all call data within U.S. ITAR-compliant cloud infrastructure.
• Restricting access to U.S. persons only, preventing unauthorized foreign access.
• Providing audit logs & tracking for ITAR-related communications.
  
  

DFARS 7012 Compliance for Microsoft Teams Calling

DFARS 7012 requires DoD contractors to use FedRAMP-authorized cloud solutions for processing CUI. Microsoft Teams Phone for GCC High meets these standards by:

• Encrypting all MS Teams to MS Teams calls in a GCC High environment & meeting FedRAMP High-security controls.
• Ensuring secure data handling with multi-layered access controls.
• Providing compliant call routing via Direct Routing in GCC High.
  
  

Why Direct Routing Is the Only Compliant Teams Calling Option

What is Direct Routing for GCC High?

Direct Routing is the only method for enabling Microsoft Teams Calling within GCC High. It connects Microsoft Teams Phone to the PSTN via a government-approved VoIP provider (like Atlantech Online). 

It also ensures full compliance with ITAR, DFARS 7012, and CMMC 2.0 security mandates and provides full encryption and data sovereignty control for all government contractors.

Why Operator Connect & Calling Plans Are Not Available

Operator Connect is not supported for GCC High because it lacks compliance certifications.

Microsoft Calling Plans do not exist for GCC High, forcing organizations to seek Direct Routing solutions.

There are a few benefits of Direct Routing for GCC High Compliance

• Full control over call encryption & security settings.
• Meets ITAR & DFARS data sovereignty requirements.
• Integrates with existing government VoIP and PBX systems.
  
  

Key Security & Compliance Features of GCC High Teams Calling

1. End-to-End Encryption for Microsoft Teams to Microsoft Teams Calls

• Protects voice data from interception & unauthorized access.
• Uses DoD-mandated encryption protocols for maximum security.
  
  

2. Secure Data Storage in U.S.-Based, ITAR-Compliant Data Centers

• All call logs and metadata are stored within GCC High cloud infrastructure.
• Prevents foreign data access risks and ensures ITAR compliance.
  
  

3. Multi-Layered Access Controls

• Only authorized U.S.-based personnel can access sensitive voice communications.
• Enables role-based access & audit logging to track compliance.
  
  

4. Compliance-Ready Call Routing

• Ensures all PSTN traffic follows DoD security protocols.
• Direct Routing allows contractors to customize call security settings for their needs.
  
  

Why Government Contractors Should Choose Atlantech Online for GCC High Teams Calling

Atlantech Online: A Trusted Government VoIP Provider

• 100% compliance with CMMC, ITAR, DFARS & FedRAMP High.
• Seamless Direct Routing integration for Microsoft Teams Phone.
• Custom security configurations to meet contractor-specific needs.
  
  

How Atlantech Online Makes Deployment Easier

• PMP-trained staff professionally manage your migration from start to finish.
• Dedicated onboarding & compliance support for a smooth transition.
• Transparent pricing with no hidden fees.
• Expert number porting & migration services to avoid downtime.
  
  

Why Security-Conscious Contractors Choose Atlantech

• Proven experience with DoD supply chain communication needs.
• Reliable & scalable Microsoft Teams Phone solution.
• White-glove customer support to ensure continued compliance & security.
  
  

Your Next Steps Toward a Compliant GCC High Teams Calling Solution

Government contractors must use compliant voice solutions or risk contract loss. Microsoft Teams Phone for GCC High meets all security mandates, but only with Direct Routing.

If you’re migrating to a GCC High Microsoft 365 license, you will no longer be able to get phone service through Microsoft, only through a Direct Routing provider like Alantech Online.

Learn more about our Teams Calling & Audio Conferencing Solution for GCC High and schedule a free consultation today!