Looking for Sinch Engage? You’re now on Sinch’s main site. Go back to Sinch Engage
Exploring an alternative to your Lumen voice service? Learn how Sinch helps you migrate smoothly when you’re ready.

VOICE FOR UCAAS

Simplify enterprise calling across Teams, Zoom & more

Voice for UCaaS from Sinch is a Bring Your Own Carrier (BYOC) solution that adds enterprise calling to Microsoft Teams, Zoom, Webex, and leading contact centers over a Tier-1 network. Consolidate carriers to improve voice quality, lower costs, and maintain platform optionality.

Talk to an expert
Image for Simplify enterprise calling across Teams, Zoom & more
Join over 200,000 businesses, including 8 of the 10 largest tech companies in the world.

WHAT MAKES IT GREAT

Three reasons enterprises trust Voice for UCaaS worldwide

When you work with us, you can replace multiple carriers with a single partner that owns the network and lets you expand voice services at a lower cost.

Streamline vendors

One partner for voice, messaging, and emergency services removes administrative overhead and simplifies your communications stack.

Deliver call quality

All calls travel through our privately owned Tier-1 IP network, delivering reliable, enterprise-grade performance.

Scale without pain

Extend full PSTN replacement, local numbers, and emergency services across the US and Canada for connector platforms while reducing total cost of ownership.

SIMPLIFY YOUR COMMUNICATIONS STACK

One partner for all UCaaS and CPaaS needs

Juggling a bunch of voice providers drains time and budget. With Voice for UCaaS, Sinch unifies UCaaS, CCaaS, and programmable voice so IT teams handle a single vendor, contract, and support model.

  • Consolidate carriers for UCaaS and CCaaS

  • Manage voice, email, and messaging through one vendor

  • Reduce administrative overhead company-wide

Image for One partner for all UCaaS and CPaaS needs

DELIVER EXCEPTIONAL VOICE QUALITY

Get reliability with Tier-1 network ownership

Every call rides our privately owned IP backbone, the largest of its kind in the US. End-to-end control means consistent quality for a distributed workforce.

  • Tier-1 network ownership

  • Enterprise-grade performance worldwide

  • Reliable connectivity backed by 99.99% uptime

  • Our native, public safety-grade emergency services platform ensures reliable, always-on emergency call routing from anywhere.

Image for Get reliability with Tier-1 network ownership

ACHIEVE SCALE AT A LOWER COST

Expand reach while protecting the bottom line

Voice for UCaaS delivers full PSTN replacement, local numbers, and emergency services. The BYOC model offers broader coverage, greater flexibility, and significant savings compared to first-party plans. Plus, easily migrate between UCaaS platforms and avoid vendor lock-in. Because your voice network and numbers are hosted on the Voyant by Sinch platform, you can seamlessly transition between leading UCaaS providers (like moving from Zoom to Teams) without disrupting your voice services.

  • Local numbers and emergency access

  • Flexible, competitive pricing

  • Lower total cost of ownership

Image for Expand reach while protecting the bottom line

REAL-LIFE USES

Where Voice for UCaaS adds instant value

Add PSTN calling to Microsoft Teams

Replace Microsoft Calling Plans with Operator Connect to give your users high-quality external calling backed by Sinch’s network.

Become a voice provider for Zoom

Connect the Sinch network to Zoom Phone via the Zoom Provider Exchange to get distributed reach, predictable pricing, and reliable call quality.

Power a cloud contact center

Supply Genesys Cloud CX or Five9 with SIP trunking so every agent benefits from reliable connectivity.

Carrier consolidation

Migrate all UCaaS and CCaaS voice traffic to a single Sinch contract, simplifying management and strengthening service consistency worldwide.

WHAT’S INCLUDED

Enterprise-grade capabilities you can rely on

Multi-platform support

Certified integrations for Microsoft Teams (Operator Connect), Zoom (Provider Exchange), Genesys, and Five9 keep your preferred UCaaS or CCaaS platform connected.

Tier-1 network ownership

Calls go through our privately owned IP network for maximum quality, reliability, and end-to-end control.

Voice & numbering

Get full PSTN replacement plus local DIDs and emergency services (available across the US and Canada for connector products).

Built-in fraud protection

Proactive monitoring detects and stops fraudulent call activity before it impacts your business.

Unified vendor for CPaaS & UCaaS

Manage voice, messaging, email, and APIs with Sinch as your only partner to streamline procurement and support.

Operator Connect for Teams

Use a simpler, operator-managed setup directly from the Teams Admin Center.

Zoom Provider Exchange

Activate certified connectivity for Teams, Zoom, and more.

Reliable, always ready, dynamic 911

It’s designed to help you meet regulations like Kari’s Law and the RAY BAUM Act, and make sure your people can reach emergency services when they need them.

FAQS

Frequently asked questions about Voice for UCaaS

Voice for UCaaS is a BYOC solution that connects platforms like Microsoft Teams, Zoom, and leading contact centers to the Sinch global voice network. Choose your platform, activate the certified integration, then port or provision numbers to start making high-quality calls.

Yes. We can be your single voice provider for platforms like Microsoft Teams and Zoom, as well as contact center platforms, simplifying your architecture and vendor management.

By choosing Sinch’s BYOC model, you benefit from our owned Tier-1 network for higher quality, broader global coverage, greater flexibility, and often significant cost savings compared to first-party calling plans.

We provide local numbers, full PSTN replacement and emergency services in 90+ countries. Availability varies by market; our team will confirm coverage for your locations.

You need a subscription to a supported platform such as Microsoft 365 E5, Zoom Phone, or Genesys Cloud CX. Some integrations, like Teams Direct Routing, also require a certified Session Border Controller (SBC).

Select your UCaaS or CCaaS provider, activate the certified integration to connect to Sinch, then port or provision numbers and start making high-quality calls.

The service includes proactive fraud detection and mitigation and inherits core compliance certifications like SOC 2 Type II and HIPAA from the Sinch Voice network.