Patent ID: 6501750
Filing Date: 2002-12-31
Classification: H04M

Abstract:
A notification method of exchanging call signals between communication devices via a data network comprising steps of:initiating a call from a calling communication device to a called communication device; in response to a determination that said called communication device is in an unavailable condition for receiving said call, initiating a camp-on capability that is executable by said called communication device, including transmitting a first notification signal directly from said calling communication device to said called communication device, said first notification signal being configured to automatically trigger a second notification signal that is transmitted directly from said called communication device to said calling communication device when said called communication device is in an available condition to receive said call, said first notification signal including a network address of said calling communication device; formatting said first notification signal such that said first notification signal is stored In memory of said called communication device for access when said called communication device switches from said unavailable condition to said available condition; and after receiving said second notification signal from said called communication device, reinitiating said call from said calling communication device to said called communication device; thereby providing said camp-on capability using direct device-to device signal exchanges.