A fast-growing regional CLEC found itself at a crossroads. Their legacy, home-grown voice switching platform had become the bottleneck to growth, a tangle of scripts, manual steps, and fragile integrations that barely held together. Voice quality fluctuated, provisioning took hours, and billing accuracy was an ongoing nightmare. The system lacked telemetry, automation, and scalability.
With over 30,000 lines of active service and more being added each month, the existing architecture was not only straining under its own weight but also holding the business back. Every new customer added technical debt, every provisioning task required manual touchpoints, and every repair consumed engineering time that should’ve been spent innovating. It was time for a carrier-grade session border controller (SBC) solution that could restore stability, scale seamlessly, and tie into modern OSS/BSS workflows.
December 2015
Telecommunications
Operational Excellence
We started by assessing multiple SBC vendors for performance, reliability, and automation potential. GENBAND’s S3 Session Border Controller quickly emerged as the optimal choice for its high availability, carrier-grade routing capabilities, and robust APIs that enabled end-to-end automation.
We built a proof-of-concept environment to validate performance under load and test integration with upstream carriers and internal OSS/BSS systems.
The design was focused not just on migration, but on future growth and zero-touch provisioning, positioning the CLEC for automated scalability.
The entire project, design, implementation, and automation was executed in just four months, racing against a legacy system that was failing fast.
Our engineering team meticulously planned a phased migration strategy. Each customer premise equipment (CPE) was pre-configured with redundant trunks connecting to both the old and new infrastructures. This approach enabled live validation and ensured that cut-overs were seamless.
Once all trunks were validated, we performed a staged cut-over, soft-porting thousands of telephone numbers from the old infrastructure to the new GENBAND S3 SBC environment. Throughout the process, active monitoring validated call paths, latency, and SIP signaling in real time.
The transition was smooth, precise, and completely transparent to end-users, not a single customer experienced downtime.
When the migration was complete, the CLEC had a fully automated, carrier-grade SBC platform capable of scaling to hundreds of thousands of lines with zero human intervention. The results were immediate and measurable:
Over 30,000 telephone numbers and hundreds of customer SIP trunks successfully migrated.
Zero downtime reported during cut-over events.
Fully automated provisioning, billing, and repair processes integrated into their OSS/BSS ecosystem.
Improved call quality and telemetry providing real-time visibility into network health.
$200,000 in additional billable revenue recovered through automation and accuracy improvements.
The project delivered a solid, future-proof foundation for voice service delivery, enabling the CLEC to focus on expanding their footprint and introducing new managed voice products, without operational chaos.
Extremely Complex
API, BSS, Genband, Microsoft SQL, OSS, S3, Session Border Controller
