Advertising system for callers to busy numbers

Apparatus and method for scheduling a telephone call

Automated booking of telecommunications calls

Automatic call back under control of a telephone terminal

Automatic call generator within a telecommunications system

Automatic call-back system and method using data indicating best

Automatic international reattempt method and apparatus

Automatic redial method for telephone switching system

Call back service for a regulatory restrictive area

Call completion services for hybrid public/private...

Call queuing notification

Callback imitation as incoming calls

Callback telecommunication system and method

Callback when not engaged by means of automated redialling...

Caller ID call-back device

Camp-on communication managing method and apparatus

Computer telephony integration

Coordinated voice and data display having temporary storage of t

Exchanging apparatus and control method for exchanging and conne

Intelligent call connection service