GTT Expands Global SIP Trunking Reach to Japan

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8:00 AM on Thursday, January 22

The Associated Press

ARLINGTON, Va.--(BUSINESS WIRE)--Jan 22, 2026--

GTT Communications Inc., a leading networking and security as a service provider for multinational organizations, today announced the expanded availability of its global enterprise voice services to include Japan. The global SIP Trunking infrastructure embedded in the GTT Envision platform supports enterprises by connecting voice infrastructure over SIP and enabling migration to cloud-based telephony with global, secure, scalable and cost-efficient services.

“Global SIP trunking for voice is an essential solution for enterprises expanding their operations across multiple continents,” said Brent Kelly, Principal Analyst, Digital Workplace, Omdia. “GTT’s announcement solidifies its position as one of the few service providers capable of supporting multinational enterprises in extending SIP-based voice capabilities to their Japanese locations.”

GTT provides global telephone numbers and termination, and its services are interoperable with leading Cloud Phone vendors, including CCP for Cisco Webex Calling, Operator Connect for Microsoft Teams, Google SIP Link and Zoom Phone Provider Exchange. GTT processes over 200 million calls a month, and its global network can support over 1.2 million channels.

“From manufacturing to life sciences to energy, Japan is a key geography for many innovative industries, and effective collaboration is crucial for their operations,” said Tom Major, Senior Vice President Product Management and Technology, GTT. “By expanding our voice coverage to include Japan, we’re responding to customer demand for voice services that enhance the collaboration platforms they already use with superior call quality.”

GTT offers free office-to-office calls and a single, global pricing model to simplify enterprise communications management. Full redundancy is delivered through SIP trunk groups that use GTT’s global geographically diverse Session Border Controllers. The service is underpinned by GTT’s global Tier 1 IP network, ensuring premium call quality.

About GTT

GTT is a leading networking and security as a service provider for multinational organizations, simply and securely connecting people and machines to data and applications — anywhere in the world. We serve thousands of organizations, bringing together the right people, partners and technology to reduce the burden on IT teams and solve the most pressing networking and security challenges. Built on our top-ranked global Tier 1 network, GTT Envision is a single global technology platform to connect, orchestrate, virtualize and automate enterprise networks, enabling customers with consumable solutions to achieve business missions and meet ongoing demand when, where and how needed. Our portfolio includes SASE, SD-WAN, security, internet, voice and other connectivity options, complemented by a suite of professional services and exceptional sales and support teams in local markets around the globe. We partner with our customers to deliver Greater Technology Together. For more information, visit gtt.net.

Press releases can be downloaded from gtt.net.

View source version on businesswire.com:https://www.businesswire.com/news/home/20260122699402/en/

CONTACT: GTT Media Inquiries:

Americas:

Mary Lynn Heath, GTT

+1-646-214-4078

[email protected]

Europe:

Siria Nielsen, GTT

+31-6-2835-4259

[email protected]

GTT Investor Relations: