Call back method

Call handling

Call queue handling

Call scheduling in a telephone network using a telephony...

Call scheduling on a telephone network using a telephony...

Call waiting deluxe feature

Call-back controllable exchange and call-back control method...

Call-back method for telecommunications and devices adapted...

Call-back number voice capture method and apparatus

Call-back number voice capture method and apparatus

Call-to-make reminder system

Communication control unit having a free dial and collect...

Communications system for establishing a communication channel o

Computer controlled call processor

Computer system with do not disturb system and method

Controller for a telephone system with code screening of incomin

Customer definable integrated voice/data call transfer technique

Customer defined call setup