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

Method of and system for password protection in a telecommunicat

Method of arbitrating type II/type III CPE's during SCWID

Method of controlling telecommunications signalling

Method of restricting telephone calls in a private branch exchan

Method of screening and prioritizing an incoming call

Method, apparatus, and system for filtering incoming...

Method, system, and database for providing a...

Methods and apparatus for authenticating and authorizing...

Minimization of distortion due to a voice coil displacement in a

Multi-user telephone line

Organization chart based call information routing

Outgoing call screening

Party selecting circuit arrangement