Legacy ISP Billing to Cloud OSS/BSS Migration Guide
A step-by-step technical blueprint for ISP CTOs and migration leads on exporting subscriber data, preserving RADIUS passwords, and transitioning core operations without service disruption.
1. 4-Phase Zero-Downtime Migration Framework
Migrating an operational ISP from legacy billing platforms (such as Splynx, Sonar, or custom MySQL databases) requires careful coordination between subscriber database extraction, RADIUS credential hash mapping, payment gateway tokenization, and BNG router cutover.
Kashtrix Telecom Architecture Team
Verified AuthorDirector of Enterprise Telecom Migrations
Over 50 successful ISP database migrations completed across North America, Middle East, and Asia-Pacific.
[Verified Operator Case Study - Name Confidential]
Legacy billing software caused high dunning churn, database deadlocks during bill run peak hours, and lacked automated CGNAT subpoena log retrieval.
Deployed Kashtrix Unified OSS/BSS with integrated FreeRADIUS AAA clusters, automated WhatsApp invoice dunning, and 100k EPS Syslog CGNAT collector.
Measured Technical Outcomes
2. Frequently Asked Questions
How are subscriber active RADIUS sessions maintained during database migration?
Kashtrix runs parallel accounting sync scripts. Active PPPoE sessions remain connected to existing BNG routers while authentication requests switch seamlessly via IP Anycast cutover.
How are historical subscriber invoices and payment ledgers preserved?
Automated ETL pipelines extract historical PDF invoices, transaction ledgers, and credit notes into Kashtrix immutable accounting storage.
What downtime should subscribers expect during software cutover?
Subscriber internet traffic experiences zero downtime. Control plane cutover takes under 15 minutes during scheduled off-peak maintenance windows.