Patent ID: 9219843
Filing Date: 2015-12-22
Classification: H04N

Abstract:
1. A communication terminal comprising: a first communication unit that is coupled to an IP (Internet Protocol) network and conducts a facsimile transmission through the IP network; a second communication unit that is coupled to a public telephone network and conducts a facsimile transmission through the public telephone network; a communication error detection unit that detects a communication error of the first communication unit; a reception unit that receives, via a user input, either of address information that the first communication unit uses for calling to the IP network and a telephone number, having a different format than the address information, that the second communication unit uses for calling to the public telephone network as information to specify a destination for the facsimile transmission and receives a selection of a communication unit used for a facsimile transmission from the first communication unit and the second communication unit; a storage unit that stores conversion information for converting a received telephone number into address information that the first communication unit uses for calling to the IP network, in a case that the first communication unit is selected as the communication unit used for a facsimile transmission and the reception unit receives an input of a telephone number as the information to specify the destination; and a control unit that controls the first communication unit to call to the IP network by using the address information that the reception unit receives in a case that the communication unit selected through the reception unit is the first communication unit and the reception unit receives the address information, and to call to the IP network by using the address information corresponding to the destination which is converted from the telephone number received by the reception unit by referring to the storage unit in a case that the communication unit selected through the reception unit is the first communication unit and the reception unit receives the telephone number, wherein the control unit controls the second communication unit to re-call to the public telephone network by using the telephone number in a case that the communication error detection unit detects the communication error when the first communication unit calls to the IP network and that the address information used for calling to the IP network is the address information corresponding to the destination which is converted from the telephone number received by the reception unit, and wherein the control unit controls the second communication unit not to re-call to the public telephone network in a case that the communication error detection unit detects the communication error when the first communication unit calls to the IP network and the address information used for calling to the IP network is the address information received by the reception unit via the user input.