| 摘要 |
<p>The server detects whether a terminal (T) e.g. mobile telephone, is located behind an network address translation device (NAT). The server determines an approximate expiration delay for a temporary association of a public address to a private address of the terminal, in case of a detection that the terminal is located behind the device (NAT), by successive sending of test messages after a rising wait delay till the detection of the termination of the association. The server transmits the approximate expiration delay as a validity duration to the terminal. An independent claim is also included for a method for connecting a signaling server with a client through a network address translation device.</p> |
