| 摘要 |
Processing voice data in a packet communication network with encryption for efficient use of a bandwidth in a Virtual Private Network (VPN) includes: confirming, by a terminal at a transmitting side, a destination address of a call connection packet; when the destination address is directed to a private network, storing call connection information within the call connection packet and registering the call connection information with an address translation table; encrypting, by the terminal at the transmitting side, the call connection packet and transmitting the encrypted call connection packet to a receiving side; storing, by a terminal at the receiving side receiving the call connection packet, the call connection information within the call connection packet therein; encrypting, by the terminal at the receiving side, a call connection response packet responsive to the call connection packet and transmitting the encrypted response packet to the terminal at the transmitting side to establish a communication path between the terminal at the transmitting side and the terminal at the receiving side; and transmitting, by the terminal at the transmitting side and the terminal at the receiving side, non-encrypted voice media data using the call connection information via the communication path.
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