Abstract: Provided are an apparatus and method for testing call processing performance and conformance of a media gateway controller and a media gateway with respect to a media gateway control (MEGACO) protocol. The method includes generating a predetermined scenario regarding a test of call processing performance of a media gateway controller or a media gateway; selecting a function of the media gateway controller or the media gateway and emulating virtual analog lines between the media gateway controller and the media gateway according to the scenario; and testing the call processing performance of the media gateway controller or the media gateway using the virtual analog lines and the selected media gateway controller or the media gateway. Accordingly, it is possible to effectively test the call processing performance of the media gateway controller or a media gateway without test equipment.

Abstract: The present invention provides a method of providing Differentiated Service (DiffServ) based Quality of Service (QoS) to Voice over Internet Protocol (VoIP) packets through a router. In the QoS providing method, VoIP call session information including source and destination IP addresses, source and destination user datagram protocol (UDP) port numbers, and requested QoS information is provided to the QoS control server by the VoIP call control device. Source and destination routers are found using the VoIP call session information and the VoIP call session information requiring provision of QoS is sent to the source and destination routers by the QoS control server. The present invention can recognize VoIP packets, provide QoS to the VoIP packets, and transmit voice packets of high quality.

Abstract: The present invention provides a Session Initiation Protocol (SIP)-based load balancing apparatus and method. The apparatus receives a message transmitted from a user at a position in front of a plurality of proxy servers each connected in parallel and decodes the received message. The apparatus selectively performs addition, renewal and deletion of user information according to an expiration field of a header and transmits the decoded message to a proxy server, if the decoded message is a REGISTER message, searches for a proxy server that will handle a destination address, increases a load of the proxy server and transmits the decoded message to the proxy server, if the decoded message is a INVITE message, and examines a proxy server of the destination address and transmits the decoded message to the proxy server, if the decoded message is a BYE message.

Abstract: An apparatus for providing quality of service (QoS) of voice over IP (VoIP) traffic on IP routers and a forwarding method therefor are provided. The VoIP quality of QoS providing apparatus in an Internet protocol (IP) network containing data traffic and providing VoIP service includes: a softswitch which performs a VoIP call coordination function in the IP network and transmits VoIP call connection information in a multicast transmission method; and a router which provides QoS in forwarding a VoIP packet, by using the information received from the softswitch. With the VoIP QoS service providing apparatus, reliable multicast transmission method is enabled in providing VoIP connection information to each router, and when a softswitch additionally processes related functions, the load to the system is reduced. Since in the router, VoIP QoS flow and QoS information are added to a flow table for performing packet forwarding, VoIP packet recognition and QoS providing are enabled.

Abstract: A telephone number domain name system is provided for managing a telephone number system using an existing domain name system thereby allowing a telephone number to be unique worldwide. The system includes a telephone number domain name system client and telephone number domain name server. The telephone domain name client includes a telephone number input section for receiving a telephone number, a domain name conversion section for converting the telephone number into a domain name, and an address request section for requesting an Internet protocol (IP) address corresponding to the converted domain name. The telephone number domain name server includes an address search section for searching an Internet protocol (IP) address corresponding to the request, and an address response section for transmitting a searched Internet protocol address to the address request section.

Abstract: An asynchronous transfer mode (ATM) host adapting apparatus comprising: a storage block for storing packet information, received cells, and parameters; an ATM network interface handling block for performing direct memory access of ATM cells and parameter stored therein, segmenting transmit packet information, reassembling received cells, transmitting and receiving the ATM cells to physical media cell received, and arbitrating in the direct memory access; and a secondary interface block for connecting the storage block to the ATM network interface handling block.

Abstract: In an apparatus and method for dispersively processing an IP packet forwarding for supporting a quality of service(QoS), an IP forwarding information base gotten by processing and extracting a routing protocol is dispersed to all input ports of a router on the basis of the QoS in a private network processor for performing a routing protocol process function, so as to dispersively process the IP packet forwarding.

Abstract: A direct memory read and cell transmission apparatus for an ATM cell segmentation system having a host CPU is disclosed. The segmentation circuit of the apparatus transfers the address and size for the start of the DMA by the byte unit. When a predetermined information is provided, and a DMA read is requested, the data is transferred through the bus of the word unit such as the PCI interface, and then necessary bytes are obtained for thereby forming a 32 bit word stream, so that the ATM cell of a 32 bit×12 word form and transfers to the lower circuit. Therefore, when the segmentation circuit processes the buffer, all data are computed by the byte unit, and in an application program, the data are not obtained for transmitting the data to the ATM cell, so that it is possible to enhance the processing capability.

Abstract: The present invention relates to a broadband terminal equipment for congestion control in the ring structure and its control method, and the object of the invention is to prevent ATM traffic congestion which can be produced in the ring in order to realize the ATM subscriber premises network having a ring structure.

Abstract: A floating cell removing device using a generic flow control includes a processor having a generic flow control processing logic for transmitting/receiving a signal cell, checking a generic flow control field of an operation and maintenance cell and removing a floating cell; a pair of cell relay and add/drop function units respectively connected to a subscriber and a network of the processor, for supporting an internal communication between subscriber terminals, temporarily storing the signal cell and transmitting it to a network device; a pair of asynchronous transfer mode hierarchical function processors for converting a cell header, inserting and extracting an operation and maintenance cell, and transmitting it to the processor and the cell relay and add/drop function units; and a plurality of buffers formed between the processor and the cell relay and add/drop function units and between the cell relay and add/drop function units, for temporarily storing data inputted therefrom.