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Network facsimile apparatus and network facsimile system

  • US 20070291748A1
  • Filed: 05/16/2007
  • Published: 12/20/2007
  • Est. Priority Date: 06/16/2006
  • Status: Active Grant
First Claim
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1. A network facsimile apparatus, serving as a caller that establishes a session based on a Session Initiation Protocol to conduct image data communicating operations with other apparatuses serving as callees including a first callee and a second callee, comprising:

  • a control section to suspend an operation for transmitting image data to the first callee when the first callee sends a communication incapable signal back to the caller in response to a session establishment request directed to the first callee and originally issued by the caller;

    a storage section to store a first IP address of the first callee;

    a network interface control section that receives a session establishment request sent from the second callee after the first IP address of the first callee is stored in the storage section, and then, sends a session establishment response back to the second callee; and

    a comparing section to compare the first IP address of the first callee, stored in the storage section, with a second IP address of the second callee, when image data are not transmitted to the caller from the second callee within a predetermined time interval after the session establishment response is sent back to the second callee;

    wherein, when the control section determines that the first IP address and the second IP address coincide with each other, based on a comparison result of the comparing section, the control section conducts controlling operations so as to transmit the image data, transmission of which is currently suspended, to the second callee.

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