VOICE
Your Tier 1 Telephony Partner
Whether you’re migrating to cloud-based telephony or connecting your voice infrastructure over SIP, we have you covered. Our Voice services help you take advantage of the advanced functionality and cost efficiencies these solutions bring – all backed by the global reach of the GTT Tier 1, IP backbone that supports our SIP-based voice network.
The Benefits of
GTT Managed Networking
EXPANSIVE & SCALABLE NETWORK
Whether you’re migrating to cloud-based telephony or connecting your voice infrastructure over SIP, we have you covered. Our Voice services help you take advantage of the advanced functionality and cost efficiencies these solutions bring – all backed by the global reach of the GTT Tier 1, IP backbone that supports our SIP-based voice network.
GLOBAL
TELEPHONY FOOTPRINT
We offer one of the largest global footprints for DIDs, termination & toll-free services. We also provide emergency services in many countries.
DIVERSE TECHNOLOGIES & PLATFORMS
WHY GTT VOICE?
Diverse global communications services integrated onto one connection.
Interoperable with key UC platforms and legacy infrastructure. Supports direct routing to Microsoft Teams, Cisco Webex Calling & Zoom Phone.
Global SIP-based voice network, which includes industry-leading Session Border Controllers for easy scalability.
Comprehensive telephony footprint with DIDs in 55+ countries and toll free in 120+ countries.
Low latency global outbound calling using our IP backbone to deliver locally terminated calls.
Free office-to-office calls.
Our Voice Portfolio
Whether you’re migrating to cloud-based telephony or connecting your voice infrastructure over SIP, we have you covered. Our Voice services help you take advantage of the advanced functionality and cost efficiencies these solutions bring – all backed by the global reach of the GTT Tier 1, IP backbone that supports our SIP-based voice network.
SIP Trunking
Integrating diverse communication capabilities onto a single global platform.
Virtual Voice Network
Industry Insights
Explore our collection of videos, research, guides and more with invaluable insights into our digitally networked world.
Why Private Cloud Is Surging and What It Means for Your Network
Navigating the Surge: Effective Strategies for DDoS Mitigation in 2025 and Beyond
E-commerce Security: How to Protect Your Business from Cyber Threats
Mitigating Risk with Secure Network Services
What Is DDoS Mitigation and How Does It Protect Your Business?
SD-WAN Performance Metrics That Matter
SD-WAN Architecture Explained
Cloud Integration Capabilities of SD-WAN
Security Considerations in SD-WAN Deployment
Our Gartner Rating
Global WAN Services
