Method and testing device for verifying the charge invoicing...

Method for achieving third-number call billing

Method for acquiring statistics in a telephone network employing

Method for allowing a called party to allocate call payment...

Method for automatically replenishing pre-paid calling units...

Method for backing up call charge data of a telephone...

Method for billing and controlling fraud in providing pay inform

Method for billing and controlling fraud in providing pay inform

Method for billing local communication services provided by an i

Method for billing multiple services on a single account

Method for calculating advice of charge

Method for call forwarding without hairpinning and with...

Method for call forwarding without hairpinning and with...

Method for call set-up and a telecommunication system

Method for charging in one number links you service

Method for controlling a credit customer call

Method for controlling overload of distributed processors of ful

Method for controlling subscriber access to a fee-based service

Method for controlling the statutory monitoring of...

Method for converting a three-party telecommunications...