Billing in the internet
Billing method and system, and billing server
Billing method for telecommunication service based on fixed fee
Billing scheme for a telecommunications network
Billing system
Billing system
Billing system
Billing system
Billing system and method for database-queried...
Billing systems and methods for communication networks...
Broadcasting of different tariff periods in a telephone system
Call authorization and billing message routing capability
Call billing and measurement methods for redirected calls
Call center management system
Call charge control and notification
Call charge management device in private branch exchange system
Call charge transferring method in PBX system
Call charging method and related network elements
Call charging method in radio telephone system and radio telepho
Call charging notification