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SIP Trunking Services

Simplify your global external communications on the cloud

Next-generation cost-effective communications platform

SIP Trunking is a global service that provides IP connectivity to the PSTN. It provides Call Collection with Service Number (e.g. Toll-Free Number, UIFN) for contact centers/conferencing bridges, and enterprise SIP full PSTN replacement with User Number (DID/DDI) for on-premises/cloud PBX, UC Platform. SIP Trunking Service also supports emergency calling, number portability, and many of the standard telephony features.

Why choose NTT?

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High interoperability and integration

MPLS and internet access with major on-premises or Cloud Unified Communication and contact center solutions.

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Improved service availability

End-to-end SLA with platform and access redundancy.

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Service elasticity

Global services provided under single MSA with automatic scale up/down of channels. 

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Enhance your business

Significantly reduce your total cost of ownership with fast service activation.