Lumen

Lumen Technologies, headquartered in Monroe, Louisiana and traded on the NYSE as LUMN, is one of the world's largest telecommunications companies — operating a global fiber network that spans more than 450,000 route miles, a heritage built through the transformative acquisitions of Level 3 Communications (2017) and CenturyLink.

UCaaS on a Carrier Network

Lumen's UCaaS offering is built on Microsoft Teams Direct Routing, enabling large enterprises and government organizations to operate Microsoft Teams as their full communications platform while Lumen provides the carrier-grade PSTN connectivity layer. This is not a software-only UCaaS proposition — it is a deep infrastructure solution backed by Lumen's own global fiber backbone and 99.999% uptime SLA.

Single-Carrier Consolidation

For organizations already purchasing connectivity from Lumen — and many Fortune 1000 companies do — the ability to consolidate UCaaS onto the same carrier agreement eliminates multi-vendor complexity, simplifies billing, and provides a single escalation path for network and voice issues. Lumen's SD-WAN managed services, cloud connectivity (AWS, Azure, Google), and MPLS offerings can all be bundled under the same enterprise agreement.

Government and Compliance

Lumen holds significant federal government contract vehicles (GSA Schedule, EIS) and supports HIPAA-eligible configurations, CPNI compliance, and FedRAMP-eligible infrastructure components — making it one of a small number of UCaaS providers with genuine credibility at the federal agency level.

Scale and Global Reach

With international PSTN coverage in 60+ countries, Lumen serves the UCaaS needs of multinational enterprises that need a unified communications platform with genuinely global carrier presence — not just a domestic SaaS product with bolt-on international coverage.