Calling party invoked held call monitoring

Carrier independent network services

Change of equal access carrier notification

Charger/detector for cordless telephones

Circuit for generating dual-tone multi-frequency signals and hig

Client-server architecture using internet and public switched ne

Client-server system for delivery of online information

Client/server electronic mail system for providng off-line clien

Collaborative working method and system for a telephone to inter

Communication apparatus with improved sub-address recall

Communication equipment in which data to be transmitted includes

Communication exchange apparatus with switching of communication

Communication service control system in an intelligent network p

Communication system and method with voice steering

Communication system user authentication method

Communications device to establish call in ISDN system

Computer system and method for storing medical histories using a

Computer system having power management processor for switching

Computer telephony system and method

Computer-telephone integration system