Automatic call-back "camp-on" service for communication systems

A method of establishing a second call between a calling and a called communication device once a first call is initially not completed in a communication system having centralized automatic redialing equipment, the method comprising the steps of:

• (a) transmitting a first predetermined coded signal from the calling communication device to the centralized automatic redialing equipment for invoking an accessing of the centralized automatic redialing equipment in response to the first call not being completed;
• (b) determining at the calling communication device if a message concerning the not completed first call is to be stored upon finding the called communication device busy or unanswered, and transmitting (i) a second predetermined coded signal to the centralized automatic redialing equipment when a message is to be stored and (ii) a third predetermined coded signal to the centralized automatic redialing equipment when a message is not to be stored;
• (c) selectively storing the message which is provided at the calling communication device concerning the not completed first call in a predetermined memory section of the centralized automatic redialing equipment;
• and
• (d) the centralized automatic redialing equipment invoking a subsequent redialing of a number of the called communication device previously found busy or unanswered;
• by determining if a message was stored in step (c), and playing the message back to the calling communication device prior to redialing the number of the called communication device in order to attempt to complete the second call.

A method of establishing a second call between a calling and a called communication device once a first call is initially not completed in a communication system where the calling communication device is a local intelligent communication device that has redial and memory capability, the method comprising the steps of:

• (a) determining at the calling communication device if a message concerning the not completed first call is to be stored in the memory when the called communication device is found busy or unanswered;
• (b) selectively storing the message which is provided at the calling communication device concerning the not completed first call in a predetermined section of the memory;
• and
• (c) invoking a redialing of a called communication device's number previously found busy or unanswered at the redialing equipment by depressing a predetermined button at the calling communication device, and
• depressing the button, determining if a message was stored in step (b), and playing the message back to a receiver of the calling communication device prior to redialing the number of the called communication device in order to attempt to establish the second call.