Patent ID: 6526057
Filing Date: 2003-02-25
Classification: H04L,H04Q

Abstract:
A terminal adapter for BISDN, comprising:an ATM AAL3/4, 5 layer to convert variable bit rate (VBR) data to an ATM cell; a plurality of constant bit rate (CBR) interfaces, each one to convert CBR data to an ATM cell; a physical layer to convert physical layer data to ATM cells; and a multiplexer/demultiplexer, which receives CBR ATM cells and VBR ATM cells, and performs one of a multiplexing and demultiplexing operation, wherein when transmitting data from R point to SB point the multiplexer/demultiplexer determines a priority of the received ATM cells based on the type of bit rate of the received ATM cells, and selects and outputs the received ATM cells to the physical layer according to the determined priority, and when transmitting data from SB point to R point, determines the type of ATM cell and outputs VBR ATM cells to the ATM AAL3/4, 5 layer and CBR ATM cells to one of the plurality of CBR interfaces.