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.

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.

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GTT Named Leader in ISG Provider Lens™ Enterprise Managed Network Services 2024 Europe Study

GTT is ranked as a Leader for the provisioning of network as a service (NaaS) and for services across WANs, LANs, managed Direct Internet Access (DIA), Voice over IPs (VoIPs) and virtual private networks (VPNs). This top ranking from ISG is based on its evaluation of 33 service providers within the managed network services industry.

GTT Named Leader in ISG Provider Lens™ Enterprise Managed Network Services 2024 U.S. Study

GTT is ranked as a top Leader position for the provisioning of network as a service (NaaS) and for services across WANs, LANs, managed Direct Internet Access (DIA), Voice over IPs (VoIPs) and virtual private networks (VPNs). This top ranking comes from ISG is based on its evaluation of 33 service providers within the managed network services industry.

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