Patent ID: 8135422

Claim:
A missing-call short message notification device, comprising: a main control module capable of controlling and scheduling other modules in the device; a relay signaling processing module capable of receiving, from a switching device, a call information of a calling user when a called user is not available, sending the call information of the calling user to the main control module, and sending information to the switching device based on an instruction of the main control module, wherein the call information of the calling user comprises a calling number and a time of call, wherein the call information is received based on a call forward number, and wherein the call forward number is allocated by the missing-call short message notification device and set as an unfinished-call short message notification number; a short message constructing module capable of constructing a missing-call short message based on an instruction of the main control module, and sending the missing-call short message to a short message sending module through the main control module; the short message sending module capable of sending the missing-call short message constructed by the short message constructing module to a called user; wherein the relay signaling processing module, the short message constructing module and the short message sending module directly communicate with the main control module, respectively.