Charging method for use in service providing system,...

Charging of subscribers with localized service areas in a...

Charging systems for services in communications

Circuit configuration for metering pulse recognition

Client-based context-based billing for wireless networks

Communication and proximity authorization systems

Communication and proximity authorization systems

Communication apparatus

Communication billing system

Communication control apparatus, method of controlling...

Communication control device, location-dependent charge...

Communication control method

Communication method, system, and device for reducing...

Communication reward

Communication system

Communication system and related supervision method

Communication system including debiting provisions for communica

Community networking using networked audio devices

Community networking using networked audio devices

Company telephone network