| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a session initiation protocol (SIP) apparatus capable of accurately excluding an illegal access from a WAN with a simple constitution and through a simple procedure. <P>SOLUTION: A SIP apparatus includes: a SIP processing part for processing a SIP request; a WAN communication part for transferring a SIP request message coming from a WAN side to the SIP processing part by adding information indicating an effect that the message is received from the WAN side; and a LAN communication part for transferring a SIP request message coming from a LAN side to the SIP processing part. When an INVITE request message is the message from a station which is registered by the previous transmission of a REGISTER request message from the SIP apparatus, the SIP processing part receives the INVITE request. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
