Arcstar UCaaS

Arcstar UCaaS ended sales on September 30, 2023.
The service will end on August 31, 2024.

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Global Site : NTT Ltd.
Unified Communications
Reduce TCO
Improve Flexibility
Advanced Services

Arcstar UCaaS gives you global access to a hosted Unified Communications solution built on our world-class, Arcstar Universal One VPN. Arcstar UCaaS is a cloud-based solution that lets you connect and collaborate from anywhere on any device, wired or wireless.

Arcstar UCaaS includes:

  • Telephony
  • Messaging
  • Mail and Calendar
  • Video Conferencing
  • Web Conferencing
  • Audio Conferencing
  • Instant Messaging (IM) and Presence
  • File Sharing

Cloud-based Arcstar UCaaS eliminates common capital and operational expenses associated with on-premises Unified Communications, including: hardware acquisition costs, integration costs, administration and management costs and costs associated with managing local communications carriers. In addition, pay-as-you-go service gives you the flexibility to scale Arcstar UCaaS services up or down as needed.

Add Arcstar IP Voice (SIP Trunk) to Lower Costs Even Further

Combine Arcstar UCaaS with the Arcstar IP Voice (SIP Trunk) for cost-effective global communications. Arcstar IP Voice (SIP Trunk) offers highly competitive calling charges to significantly lower fixed-line calling costs.


Arcstar IP Voice (SIP Trunk) on-premise CPE model: Manage your own telephony infrastructure.


Arcstar IP Voice (SIP Trunk) hosted IP-PBX (UCaaS) model: Outsource your IP telephony and Unified Communications (UC) infrastructure.

Arcstar UCaaS works with any device, wired or wireless, and securely connects remote workers through the Arcstar Universal One VPN or the Internet. This gives workers at remote offices the same communication and collaboration tools, no matter where in the world they are located without relying on local communications carriers.

Arcstar UCaaS reduces lead time, letting you setup quickly by allocating only the functionality needed to suit each users work style. You can use the web-based portal to make changes, any time.


Desk workers: Mostly planners and designers, these are people who work at their desks.
Office mobile workers: People who constantly walk around the office and are often away from their desks at meetings, etc.
Mobile workers: People primarily out of the office visiting clients or plants. They incur high cell phone costs.

Enhance the cost-efficiencies and convenience of communication and collaboration by combining Arcsar UCaaS and our other advanced networking services.

Arcstar IP Voice
Arcstar IP Voice (SIP Trunking Service) simplifies external communications and lowers costs to provide a comprehensive cloud-based communications and collaboration platform.

Arcstar Universal One
Arcstar Universal One offers next-generation VPN services and a high-quality, highly-reliable network.

Global Management One
Global Management One™ Service provides one-stop, global, seamless management services for your entire IT environment.


Arcstar UCaaS Cisco Type

A unified communications environment with feature rich IP-telephony, usability and an emphasis on voice quality.


Sophisticated voice IP-telephony and UC functions and a dedicated portal.


NTT Communications has achieved Cisco Powered Service designations in the following categories:


Cisco Powered Cloud Services

  • UC as a Service based on HCS

Cisco Powered Managed Services


Arcstar UCaaS supports Cisco Jabber, a set of capabilities running on multiple devices and delivered in a variety of ways, including Presence, Instant Messaging, Click to Call, Group Chat, Softphone, Call history, Voicemail integration, Desktop sharing and Video. These capabilities are provided on multiple OS devices, including iOS, Android and Windows.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries.

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