Patent ID: 8988737
Filing Date: 2015-03-24
Classification: H04N

Abstract:
1. A communication system comprising: a client device that does not include facsimile transmission functions; and a relay device that is communicably connected to the client device via a private network while also being communicably connected to an external device via a public network, includes facsimile transceiving functions that transmit and receive facsimiles via a public network line associated with the client device, wherein the client device requests the relay device for information on the public network line, the relay device transmits the information on the public network line to the client device in response to the request from the client device, the client device receives the information on the public network line from the relay device, adds the information on the public network line to image information, and issues facsimile transmission instructions to the relay device, and in response to the facsimile transmission instructions received from the client device via the private network, the relay device transmits to the external device a facsimile of the image information with added information on the public network line associated with the private network.