| 摘要 |
<p>When a CPU (201,401) receives, from a source IP telephone apparatus (101), a request "Register (Unregister)" for deleting a NAPTR record (S616), or when the reception of the request "Register" for registering the NAPTR record that is regularly received from the source IP telephone apparatus is suspended, the CPU refers to the user data stored in a user database (403), and transmits, to an ENUM server (103), a request for deleting the NAPTR record of the source IP telephone apparatus. Further, when a request for the NAPTR record of the source IP telephone apparatus is regularly received from a destination IP telephone apparatus via a network interface and when the deletion process of the NAPTR record is completed (S512), the CPU returns, to the destination IP telephone apparatus, a response indicating that the NAPTR record of the source IP telephone apparatus is deleted (S801).</p> |
