Virtual Voice Network

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Flexibility and Control Across GTT’s Global Voice Network

Global enterprises are increasingly looking for added routing control and flexibility to integrate their own third-party voice carriers.

GTT SIP Trunking Virtual Voice Network (VVN) allows enterprises to easily expand their global voice footprint without making large upfront infrastructure investments. The  solution provides the ability for enterprises to switch voice traffic and create interconnects with other parties, and with GTT’s fully redundant Session Boarder Controllers (SBCs), organizations can  also connect various sites and cloud phone system providers across our voice network.

This feature is further complimented by GTT’s Enterprise product for voice services including DIDs and global termination capabilities.

The Benefits of VIRTUAL VOICE NETWORK

Bring your own 3rd party carrier and control your call routing – all with access to the global PSTN

BYO Carrier

Customers can connect to a third-party carrier for specific local national voice features or simply take advantage of this option to keep an existing partner.

Third party carrier integration could include functionality based services like emergency contact center or contact center features.

Free On-net Calling

VVN connected sites can use a local carrier for their calls and can still connect to other connected GTT sites on-net, benefitting from free inter-office calling.

GTT ENVISIONDX - GTT’s Digital Gateway

GTT’s user-friendly GTT EnvisionDX portal provides businesses access to their own routing engine, allowing them to design a dedicated dial plan and change egress routing trunks, in real-time, as needed.

Routing control

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Customers can block unwanted calls

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Customize inter-site routing allowing SIP traffic to be moved to another site

Insight Control
Global SIP Trunking footprint

SBC replacement

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Removes any need for a customer to own or manage their own Session Border Controller (SBC)

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Access to GTTs inter-continental fully redundant geographically diverse spread of global SBCs

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Eliminates the requirement for a customer-owned switch, reducing capital expenses.

HOW VIRTUAL VOICE NETWORK WORKS

Virtual Voice Network & SIP Trunking Diagram

Related Services

SIP Trunking

Integrating diverse communication capabilities onto a single global platform.

Cloud Phone Direct

Global, scalable & High-Performing Enterprise Voice Services

Teams logo

Microsoft Teams

We can deliver dedicated SIP trunks to Microsoft Teams services residing in Office 365. As a Tier 1 ISP, GTT peers directly with Microsoft, ensuring the lowest latency connectivity between our voice network and Microsoft Office 365.
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Zoom Phone

With Zoom’s BYOC feature, you can use GTT SIP Trunking together with the Zoom Phone cloud. You can enjoy all of the benefits and features of Zoom Phone while benefiting from our global voice solution for outbound calling, as well as new and ported DIDs.
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Cisco Webex Calling

Our SIP Trunking service can provide Cloud Connected PSTN (CCP) capabilities for Cisco Webex Calling clients. You can make inbound and outbound telephone calls using telephone numbers assigned by or ported to GTT.
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AnywhereNow

Easily incorporate GTT Voice with AnywhereNow cloud-based contact center, natively integrated with Microsoft Teams. You can activate a GTT SIP Trunk group to Microsoft Teams Direct routing and AnywhereNow.

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Our Gartner rating

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Global WAN Services

4

 
 

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As of 13 May, 2026

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