Abstract: The present invention discloses an access device for supporting a variable data layer including: a user access processing module unit for receiving and processing an input command of a user, providing externally-received voice data to the user, and processing access to a local area network; a central control processing module unit for processing the voice data processed in or inputted to the user access processing module unit, and controlling processing units of the respective modules; and a wide area network access processing module unit for receiving data from the central control processing module unit, and performing a matching operation for a physical layer access. As a result, the access device supports the variable data layer, minimizes hardware variations due to variations of a physical layer access medium, and utilizes system hardware according to environmental variations of the physical access unit.

Abstract: The present invention relates in general to an interface module of an asynchronous transfer mode(ATM) terminal using the ATM for transmitting information, particularly to an ATM interface module having an interfacing function required to ATM communication terminals which supports other services and capable of interfacing with the other upper layer service modules by changing an interface module software according to a respective service type.

Abstract: The WAN access system has: a user connection process module section for converting analog signals to digital signals so as to process information in a switching system and processing a corresponding request of a user; a WAN connection process module section for selecting TDM buses so as to enable a line switching of a packet switching and extracting data to be transferred to an AAL1-processing/UTOPIA-multiplexing section; and a central control process module section for controlling the WAN access system, the central control process module section being connected to the user connection process module section and the WAN connection process module section to perform switching between the TDM buses, so as to enable the line switching and the packet switching, the central control process module section performing an AAL5 SAR processing and an SAAL processing, and an AAL1 processing and a UTOPIA bus multiplexing.

Abstract: An Internet telephony gateway system includes a main controlling device that prepares a packet comprising compressed voice data and transmits the packet to the communication network, or extracts compressed voice data from the packet received from the communication network and transmits the extracted data to at least one specific function board in response to a signal form of the extracted data. The system also includes at least one specific function device connected to the main controlling device for processing one of analog signal protocol and digital signal protocol. The extracted data is provided to a digital specific function device to communicate with a communication device capable of processing digital data, and the extracted data is provided to an analog specific function device to communicate with a communication device capable of processing analog data.

Abstract: The present invention discloses an access device for supporting a variable data layer including: a user access processing module unit for receiving and processing an input command of a user, providing externally-received voice data to the user, and processing access to a local area network; a central control processing module unit for processing the voice data processed in or inputted to the user access processing module unit, and controlling processing units of the respective modules; and a wide area network access processing module unit for receiving data from the central control processing module unit, and performing a matching operation for a physical layer access. As a result, the access device supports the variable data layer, minimizes hardware variations due to variations of a physical layer access medium, and utilizes system hardware according to environmental variations of the physical access unit.