Purchase of Billing System Software "Billing System ready-made package Software" for automatic management of Internet and communication services and calculation of payments must be provided with software in the form of a ready-made package according to the detailed technical design based on the existing infrastructure. Billing main system license (one-time permanent license). Billing and payment automation module. Reporting module. RADIUS (AAA) module. IPv4 Management module. Equipment and PON monitoring module. PPPoE / IPoE DHCP module. CRM module. SMS integration. TR-069 module. HelpDesk/Ticketing module. Inventory Management module. Planning module. Netflow Collector module. Telegram Bot integration. IPTV module. VOICE (VOIP) service support and integration (SoftSwitch and vIMS). Preparation of the system environment.Billing installation and initial configuration. Integration with network equipment. Existing payment systems (terminal, web, app, etc.) and SMS/Telegram integration. Integration with IPTV platform. Data migration (if applicable). Conducting functional tests. Performance and load tests (128,000 subscribers). Pilot operation phase. Backup and DR scenario development. Full commissioning. System architecture and deployment documentation. Installation and configuration guide. User (Admin, NOC, HelpDesk, CRM, Finance) manuals. Integration and API documentation. Technical and functional adoption plan. Training for admin and system engineers. Training for NOC/Network Engineers. Training for HelpDesk and CRM users. Training for financial and reporting users. Delivery of the billing system (software) as an intangible asset of the enterprise on the basis of a license. Full technical support during the warranty period. Enterprise's financial and economic (ERP) software, Billing Organization of mutual integration between system support Integration of ETSI LI (Lawful Interception) module Training program Migration plan and execution Software update (Update/Upgrade)