4. The method of claim 1 , where the first module is included in a voice mail server and the second module is included in a gateway device, the method further comprising: providing a voice mail service based on receiving the first call event information.
4. The method of claim 1 , where the first module is included in a voice mail server and the second module is included in a gateway device, the method further comprising: providing a voice mail service based on receiving the first call event information. 6. The method of claim 4 , where the SIP server and the voice mail server are included in a local area network (LAN).