Abstract: A network address translation device for processing session initiation protocol (SIP) packet is provided. The network address translation device receives a first SIP packet and a second SIP packet. The first SIP packet at least includes a former part of a message and the second SIP packet includes a latter part of the message. The network address translation device further obtains the former part of the message from the first SIP packet, reassembles the second SIP packet by combining the latter part with the obtained former part of the message from the first SIP packet, and translates and sends out the first SIP packet and the reassembled second SIP packet.

Abstract: A network address translation device for processing session initiation protocol (SIP) packet is provided. The network address translation device receives a first SIP packet and a second SIP packet. The first SIP packet at least includes a former part of a message and the second SIP packet includes a latter part of the message. The network address translation device further obtains the former part of the message from the first SIP packet, reassembles the second SIP packet by combining the latter part with the obtained former part of the message from the first SIP packet, and translates and sends out the first SIP packet and the reassembled second SIP packet.

Abstract: A network device including a receiving module, a packet determining module, a conversion module, a storage module and a processing module is provided. The receiving module is for receiving fragmented packets. The packet determining module is for determining packet types of the fragmented packets, the packet types comprising a special fragmented packet and a normal fragmented packet, and the special fragmented packet comprising a header field. The conversion module is for converting network parameters of the special fragmented packet. The storage module is for storing buffering information of the normal fragmented packet, along with connection information and fragmentation information of the special fragmented packet. The processing module is for processing the normal fragmented packet and the special fragmented packet according to the buffering information, the connection information and the fragmentation information. A method for processing the fragmented packets is also provided.