Patent ID: 8284919

Claim:
A network system, comprising: a first communication device; a second communication device composed separately from the first communication device; and a server composed separate from the first communication device, wherein the first communication device comprises: a first access device capable of accessing a network address, and an address sending device that sends a combination of the network address accessed by the first access device and communication device identification information of the first communication device to the server; wherein the server comprises: an address database that stores the combination of the network address and the communication device identification information sent from the address sending device, an identification information database that stores a combination of the communication device identification information and telephone identification information of a source, and an identification information identifying device; wherein the second communication device comprises: a telephone device that receives the telephone identification information, an address acquisition device that acquires the network address from the address database when the telephone device receives an incoming call, and a second access device capable of accessing the network address acquired by the address acquisition device; wherein the identification information identifying device identifies, from the identification information database, the communication device identification information combined with the telephone identification information received by the telephone device; and wherein the address acquisition device acquires, from the address database, the network address combined with the communication device identification information identified by the identification information identifying device.