Call appearance reservation arrangement

Call coverage arrangement in an ISDN switching system

Call monitoring system for intelligent call processing

Call processor for a computer telephone integration system

Call screening apparatus and method

Call screening apparatus and method

Call transfer system and electronic mail transfer system

Called subscriber selecting system

Caller directed routing of toll free calls using variable prefix

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