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.
Talk to an Voice Expert
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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.
The Benefits of GTT Voice
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
SIP-based interoperability with UC platforms (Microsoft, Avaya, Cisco, ShoreTel & Siemens). Flexible access options, include public IP & private network.
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.
Related Services
SIP Trunking
Integrating diverse communication capabilities onto a single global platform.
Operator Connect For Microsoft Teams
Trusted partner of Microsoft withglobal voice services from GTT
RELATED RESOURCES
Awards & Analysts
GTT Awarded Managed SD-WAN Leadership Status in Germany in 2024 ISG Provider Lens Network Report
The Information Services Group (ISG), a world-renowned technology research and market intelligence advisory firm writes: GTT delivers a large portfolio of tailored managed SD-WAN ...
Press Release
Retailer Kiabi Transforms Global Network with GTT, Expanding Capacity at New Locations & Enabling Business Growth
GTT’s managed connectivity and professional services enable enhanced omnichannel shopping experience, streamlined operations supporting commercial expansion across 430 sites
Awards & Analysts
GTT Recognized as the SASE Rising Star by the Information Services Group (ISG)
The 2024 ISG Provider Lens™ Network – Software Defined Solutions and Services Report reads that GTT has been awarded this year’s Rising Star in ...
OUR GARTNER RATING
![Gartner Peer Insights Reviews Gartner Peer Insights Reviews](https://www.gtt.net/wp-content/uploads/2023/01/Gartner-Peer-Insights-Reviews.png?w=224)
4.2
62 Reviews
88%
![](https://gtt.net/wp-content/uploads/2023/01/thumbs-up-black.png?w=41)
as of the last 12 months