CBTS

CBTS — a subsidiary of Cincinnati Bell — brings enterprise-scale UCaaS infrastructure to large organizations requiring 500+ seats, with the technical depth of a 2,300-person company behind every deployment. Headquartered in Cincinnati, Ohio, CBTS has demonstrated its ability to execute at serious scale, with the company's largest referenced deployment reaching 60,000 seats — placing it among the most proven providers in this comparison for organizations approaching the upper range of enterprise communications complexity.

Cisco Ecosystem Depth

CBTS delivers UCaaS through Cisco's ecosystem (Cisco Call Manager, Webex Calling), Microsoft Teams Direct Routing, and a multi-platform architecture powered by Ribbon connectivity. This Ribbon-powered infrastructure enables diverse SIP configurations and supports organizations transitioning from multi-year on-premises investments to cloud communications — a critical differentiator for enterprises with legacy Cisco telephony deployments that want a trusted migration partner rather than a forced cutover.

Open CCaaS Integration

The platform's interoperability extends to contact center infrastructure: CBTS UCaaS integrates with Genesys, Twilio, and any third-party contact center solution, making it the right choice for organizations that want to separate their UCaaS and CCaaS decisions rather than being forced into a single-vendor contact center bundle. This architectural openness is rare at the enterprise tier and valuable for organizations with existing CCaaS investments they want to preserve.

Global Infrastructure

Data centers span APAC (Australia, India, Japan, Singapore), Canada (Toronto, Vancouver), EMEA (Amsterdam, Frankfurt), LATAM (Brazil), UK (London), and major U.S. markets (Chicago, Dallas, Los Angeles, New York City). The 500-seat minimum and 99.99% uptime SLA reflect CBTS's positioning as an enterprise-first provider.

Ideal for On-Premises Migration

For regulated industries — particularly banking, financial services, insurance, healthcare, and manufacturing — CBTS's depth of enterprise experience, its proven 60,000-seat deployments, and its ability to integrate with existing on-premises Cisco infrastructure while preserving existing CCaaS investments make it one of the most credible large-enterprise UCaaS options in this analysis.