Method and apparatus for restricting dialing authorization in co

Method and apparatus for selectively blocking incoming telephone

Method and apparatus for telephone call fraud detection and...

Method and apparatus for telephone routing between PTN and PSTN

Method and apparatus in a communications system for dynamic...

Method and arrangement for connection of a computer to a...

Method and system for call screening

Method and system for connecting subscribers of a...

Method and system for detecting fraudulent collect calls

Method and system for determining independent authorization...

Method and system for providing password protection

Method and system to bypass alternate routing plans applied to d

Method for avoiding call blocking

Method for controlling fraudulent telephone calls

Method for controlling long distance calling using a multi-frequ

Method for deciding on the acceptance or non-acceptance of a cal

Method for detecting and reducing fraudulent telephone calls

Method for processing forwarded telephone calls

Method for processing incoming call

Method for the legitimacy check of call numbers of calls incomin