227568 ⎘
Automatic or semi-automatic exchanges; Arrangements for supervision, monitoring or testing with provision for checking the normal operation for metering arrangements or prepayment telephone systems
Testing toll-free data service campaigns
#2Methods and apparatus to determine a telecommunications account status
#3System and method for individual sequential campaign
#4Method For Securing The Communication Links And The Associated Charges In A Redundant Communication Network
#5System and method for verifying subscriber data records in a telephone system
#6Method and testing device for verifying the charge invoicing for a communications connection according to time-unit intervals
#7System and method for monitoring time-related connection data detected by a network node