What are the three connection options?

SIP Trunking, WebSocket, and WebRTC. Together they cover integration with existing phone systems, fast proofs of concept, and coordination between AI agents and human operators.

Does NTT CPaaS Voice provide the AI agent itself?

No. NTT CPaaS Voice handles the communications and API infrastructure, while the AI agent is supplied separately. The BYO Agent approach lets companies combine voice AI technologies such as ElevenLabs as needed.

How much does the service cost?

Pricing details are available on the dedicated special page for Voice AI Connect, which also covers the features and use cases of each connection technology.

Large Language ModelsAudio & SpeechPR TIMES (AI)13h agoNov 11, 2026, 13:01 JST

NTT CPaaS Voice adds SIP Trunking to link calls to AI

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3 Key Points

What happened
NTT Docomo Business X began offering SIP Trunking on October 14, 2026 for NTT CPaaS Voice, completing three connection options with WebSocket and WebRTC under its Voice AI Connect offering.
Why it matters
Companies can embed voice AI into existing phone systems or run quick proofs of concept without locking into one generative AI vendor, which may lower the barrier for contact-center automation.

WHO IT HITSContact-center operators and enterprise IT teams that run phone-based customer support are the main audience, since the service is positioned for automating first-line call handling and easing staffing and cost pressures.

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Context & Analysis

The launch fits a broader push to bring generative AI into phone-based customer contact, where the release notes that labor shortages and rising costs are driving demand to automate and streamline contact centers. By offering SIP Trunking alongside WebSocket and WebRTC, NTT Docomo Business X is covering different starting points: integrating with an existing phone environment, running a rapid proof of concept, or linking AI agents with human operators.

The vendor-neutral BYO Agent design is the distinguishing piece. NTT CPaaS Voice supplies the communications and API layer but does not provide the AI agent itself, so customers can combine voice AI technologies from partners such as ElevenLabs. That separation is presented as a way for companies to start small and expand voice AI use in stages rather than committing to a single generative AI vendor.

The partnership with ElevenLabs Japan extends beyond technology into market education. A free online seminar on December 10, 2026, will address staffing shortages and the limits of multi-level IVR systems, then present the Voice AI Connect approach and the NTT CPaaS Voice lineup, with an ElevenLabs service introduction and demo planned. ElevenLabs, founded in 2022, describes a current company valuation of $22 billion and says its platform is used by thousands of companies, including more than 80% of Fortune 500 firms.

FAQ

What are the three connection options?: SIP Trunking, WebSocket, and WebRTC. Together they cover integration with existing phone systems, fast proofs of concept, and coordination between AI agents and human operators.
Does NTT CPaaS Voice provide the AI agent itself?: No. NTT CPaaS Voice handles the communications and API infrastructure, while the AI agent is supplied separately. The BYO Agent approach lets companies combine voice AI technologies such as ElevenLabs as needed.
How much does the service cost?: Pricing details are available on the dedicated special page for Voice AI Connect, which also covers the features and use cases of each connection technology.

PR TIMES (AI)Read Original Article

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