Teams Direct Routing for GCC High
CallTower's GCC High Direct Routing solution provides PSTN connectivity for Microsoft Teams GCC High tenants — the Microsoft cloud environment required for US federal agencies, defense contractors, and organizations handling Controlled Unclassified Information (CUI) under ITAR, DFARS, or CMMC compliance mandates. CallTower is among the few providers with the certifications to deliver voice services in the GCC High environment.
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Related Services
Microsoft Teams Direct Routing — Native
CallTower's Native Microsoft Teams Direct Routing connects the Microsoft Teams platform to the PSTN — enabling users to make and receive external calls directly within Teams without a separate phone system. As a Microsoft-certified Direct Routing provider, CallTower delivers PSTN connectivity through a fully managed service with E911, SMS, and failover capabilities built in.
Microsoft Teams Operator Connect
CallTower Operator Connect provides PSTN calling for Microsoft Teams through Microsoft's Operator Connect program — a managed service model where the carrier relationship is established directly within the Teams Admin Center. Operator Connect simplifies provisioning compared to Direct Routing by eliminating on-premises SBC management while maintaining carrier-grade calling quality.
CT Cloud UC — CallTower UCaaS Platform
CT Cloud UC is CallTower's proprietary unified communications platform — offering cloud business phone, auto-attendant, call routing, voicemail, conferencing, and collaboration tools as an alternative to Microsoft Teams or Cisco Webex. CT Cloud UC is designed for organizations that want a managed UCaaS solution without committing to the Microsoft or Cisco ecosystem.
Cloud Contact Center — Five9, Genesys, CT CCaaS, Webex
CallTower delivers cloud contact center as a managed service across multiple CCaaS platforms — Five9, Genesys Cloud, CallTower's own CT Contact Center, and Webex CCaaS. CCaaS integrations with Microsoft Teams and Webex enable contact center agents to reach subject-matter experts across the unified communications platform without leaving the CCaaS interface. Professional services and migration support are available for CCaaS deployments.