Callback Platform for Global Telecommunications

Project Overview

A telecommunications company from Hong Kong developed an innovative platform enabling call completion services with comprehensive callback functionality. SweetSoft provided outstaffing support to build a system that allows users to remain connected even with insufficient account balances—a critical feature for business continuity and customer satisfaction.

Challenges

• Balance Detection: Detecting insufficient account balances and failed call attempts in real-time
• Authentic Notifications: Generating genuine missed call notifications that appear identical to standard calls
• Zero-Balance Connectivity: Enabling users to initiate contact even with zero account balance
• User Experience: Creating automatic functionality requiring minimal setup and configuration
• Network Integration: Integrating with multiple global telecommunications networks
• Offline Capability: Maintaining functionality even when users are offline or unreachable
• Call Presentation: Ensuring callback calls present as standard phone communications

Our Solution

We engineered a comprehensive callback platform that seamlessly integrates with global telecommunications networks, providing users with uninterrupted connectivity regardless of account status.

Key Features

• Authentic Missed Calls: Real missed call notifications appearing on-screen exactly like genuine calls
• Caller Identification: Complete display of caller identification and phone numbers
• Standard Call Presentation: Calls present as regular phone communications to recipients
• Automatic Operation: Minimal setup required with automatic functionality
• Offline Capability: System works even when users are offline or unreachable
• Balance Monitoring: Real-time detection of insufficient account balances
• Failed Call Recovery: Automatic handling of failed call attempts with callback initiation
• Global Network Integration: Seamless integration with 30+ telecommunications networks worldwide

Technical Highlights

• .NET Core backend for high-performance call processing
• Multi-database architecture: MySQL, MongoDB, and PostgreSQL for optimized data management
• JavaScript frontend for responsive user interface
• Entity Framework for efficient data access and manipulation
• FastCGI caching for rapid response times
• Redis for high-speed session management and caching
• Real-time notification system matching genuine call behavior
• Scalable architecture supporting multiple network integrations
• Robust error handling and automatic retry mechanisms

Project Metrics

• Partnership Duration: 2020–2022
• Development Hours: 44,000+
• Platform: Web
• Services Delivered: Web Development, Quality Assurance, Support & Maintenance
• Global Network Integration: 30+ telecommunications networks

Results

• Global Connectivity: Successfully integrated with 30 global telecommunications networks
• Continuous Service: Subscribers remain connected regardless of account balance status
• Authentic Experience: Notification system perfectly matches genuine call behavior
• Immediate Response: Users can initiate callback responses instantly
• Natural UX: Maintained natural user experience throughout the callback process
• Business Continuity: Ensured uninterrupted communication for critical business needs
• High Reliability: Robust system handling failed calls and balance issues automatically

Client Impact

The callback platform has revolutionized how the telecommunications company serves customers with low or zero account balances. By enabling authentic missed call notifications and seamless callback functionality, the platform ensures business continuity and customer satisfaction even when accounts are depleted. The integration with 30 global networks has expanded the client’s service reach while maintaining a natural, user-friendly experience that requires minimal configuration from end users.