System for transmitting a change in call queued/hold state...

System for updating network topology based on configuration obta

System for validating phone numbers to prevent affiliate fraud

System for validating phone numbers to prevent affiliate fraud

System having fixedly priorized and grouped by positions I/O lin

System of dedicated elementary data processing machines organize

System with call forward profile

System with call forward profile

System, apparatus and method for processing calls based on...

System, method and apparatus for court-ordered surveillance...

System, method and computer program product for conveying...

System, method and user interface for data announced call transf

System, method and user interface for data announced call...

Systems and methods for an operator system service

Systems and methods for arranging a call

Systems and methods for arranging a call

Systems and methods for call screening

Systems and methods for call screening

Systems and methods for collect call processing

Systems and methods for facilitating provisioning of...