WAN access system capable of performing a line switching and a packet switching

A WAN access system capable of performing a line switching and a packet switching, the WAN access system comprising:

• a user connection process module section for processing a corresponding request of users;
• a WAN connection process module section for performing transfer, extraction, and transformation of data;
• and
• a central control process module section for controlling the WAN access system, wherein
• the central control process module section comprises:
• a TDM switching section for performing switching between the TDM buses so as to enable the line switching and the packet switching;
• a voice processing section for performing compression/restoration for voice data transmitted/received;
• and
• a processor module section for performing an AAL5 SAR processing and an SAAL processing and controlling a switching path for the TDM switching section, and
• the WAN connection process module section comprises:
• a physical medium connection section for performing a physical medium connection;
• a frame conversion section for converting a frame available in a physical layer into an electric signal and converting an electric signal received through the physical medium connection section into frame data;
• a TDM selection section for selecting and processing a predetermined TDM bus according to a control of the processor module section;
• an AAL1-processing/UTOPIA-multiplexing section for performing an AAL1 SAR processing and a UTOPIA bus multiplexing processing;
• and
• a PLCP processing section for transforming data received through a second UTOPIA bus into a frame available in the physical layer and transferring the frame to the frame conversion section through the TDM selection section, the PLCP processing section extracting data to be transferred through the second UTOPIA bus to the AAL1-processing/UTOPIA-multiplexing section from the frame in the physical layer received through the frame conversion section.