Cell transceiver in asynchronous transfer mode with cell transmit / receive path test

摘要

The present invention relates to an ATM cell transceiver having a function capable of self-testing a path for transmitting and receiving an asynchronous transfer mode (ATM) cell. The present invention relates to a SARA-S for decomposing a message into the asynchronous transfer mode cell. ; A SARA-S control memory for buffering and transmitting a predetermined message to the SARA-S to support synchronous access of the SARA-S; SARA-R for assembling the received asynchronous delivery mode cell in the form of a predetermined message; A SARA-R control memory for buffering and transmitting a predetermined message output from the SARA-R to support synchronous access of the SARA-R; A switch for forming a loopback path between SARA-S and SARA-R during a test of a transmit / receive path of an asynchronous transfer mode cell; During the test, the operation of the switch is controlled, a predetermined message for the test is sent to the SARA-R control memory, and a message received from the SARA-R control memory is compared with the predetermined message to send the abnormality of the loopback path. It characterized in that it comprises a microprocessor for determining.