Overview

Calling plans to meet your organization’s needs

Integrate your on-premises private branch exchange (PBX) or take a hybrid approach to optimize the value of your previous investments while moving to the cloud. Our Cloud Voice solution provides the connection between your modern workplace and important business services.

We provide simple, flexible calling plans tailored to meet your global voice needs, adhering to all global regulatory compliance requirements.

Read the data sheet
Collaboration & CX
If you’re questioning how to modernize your communications, Cloud Voice is always the answer 
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Key outcomes

Key outcomes

Universal and interoperable

Our Cloud Voice services remain the same, regardless of the communications systems used.

Simplified management

Scalable services to support your growth. Reduce the complexity of managing multiple carriers by consolidating contracts, billing, infrastructure and support.

Global

Calling plans are available in 39 countries with data centers in the Americas, Asia and Europe.

Cost-effective

With competitive pricing and low entry costs in all covered geographies, we offer four calling plans to suit your calling needs. 

Quality and reliability

Our ultra-fast, resilient, wholly-owned network backbone is ranked as a Top 5 Global IP Backbone.

Operator Connect by NTT

Enable user numbers and call plans in Microsoft Teams with carrier-grade telephony and support services. 
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Success stories
See the connection: NTT, Microsoft and University College London

Connecting educators to deliver better learning outcomes

Partnering with Microsoft, we enabled UCL, with 13,000 staff and over 40,000 students, to consolidate their communication and collaboration platform into a simpler yet more powerful and cost-effective solution.
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See the connection: NTT and Jensen Hughes

Using Microsoft Teams and Cloud Voice led to 50% cost savings

Discover how engineering and consulting firm Jensen Hughes expanded their footprint, improved their offering and saved 50% on their communication costs.

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See the connection: NTT and Paradigm

Adding calls to Microsoft Teams to replace legacy phone systems

As a global building industry technology provider, Paradigm needed help to leverage their existing Teams license, simplify their telephony and enable significant cost savings.

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See the connection: NTT and Florida Crystals

Enabling effortless collaboration with Microsoft Teams

US-based Florida Crystals sought an experienced technology partner to help them improve employee collaboration and connect disparate communication tools. We enabled the transformation to a complete unified communications solution. 
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Related service
Partners

Partners

Cisco DNA
Microsoft

NTT Why

39

Countries with access to full PSTN replacement 

39

Countries with access to full PSTN replacement 

Top 5 

Global IP backbone (ranked by CAIDA’s ASRank)

Top 5 

Global IP backbone (ranked by CAIDA’s ASRank)

190+ 

Countries leverage our network services 

190+ 

Countries leverage our network services 

99.99% 

Guaranteed service availability

99.99% 

Guaranteed service availability
Insights

Related insights and resources

A beginners guide to Cloud Voice
What is Cloud Voice Part 1
What is Cloud Voice Part 2
Global Voice Design Workshop
Read the data sheet
Microsoft Teams Calling Workshop
Read the data sheet
Collaboration & CX
Why choose NTT for Operator Connect?
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Collaboration & CX
Telephony in Microsoft Teams: Operator Connect vs. Direct Routing
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