Patent KR-100269261-B1 (KR)
Inventor: SO YUN SEOP
IPC: H04L12/28
Filed: 1997-07-14
Granted: 2000-10-16
Abstract: PURPOSE: A test device of an ATM exchange subscriber control module is provided to test whole path of various subscriber and switch network by being controlled by a call connection control device of the ATM exchange subscriber control module, to be mounted inside an ATM exchange by having the same shape as a board used at the ATM exchange, and to perform various tests by generating and analyzing a test cell through the control of the call connection control device. CONSTITUTION: A central control circuit part(210) generates a data signal line, an address signal line, and a control signal line by having a 32 bit processor, and buffers these signal lines, and supplies these lines to a local bus(235). An address decoding part(220) appoints an address about devices of a test device(200) and registers by combining the address signal and control signals. A memory part(230) stores programs and data. A cell transmission part(240) generates a test cell, and stores the test cell at transmission test cell FIFO parts(243,244) temporarily, and transmits the test cell to a TAXI transmission part(245). A cell receipt part(250) transmits the test cell to a test analysis part(254) or the central control circuit part(210). A TAXI selection part(260) selects serial data as a differential signal outputted by the TAXI transmission part(245) in the time of a loop back test, and selects serial data as a differential signal outputted by a cell multiplexing/demultiplexing device(100) in a normal state. A cell transmission control part(241) reports a current state of the test device(200), and controls a transmission of the control cell and the test cell. A test cell generating part(242) generates the test cell according to the control of the cell transmission control part(241), and transmits the test cell to the transmission test cell FIFO part(244). The transmission test cell FIFO part(243,244) transmit the test cells generated by the test cell generating part(242) and the central control circuit part(210) to the TAXI transmission part(245). The TAXI transmission part(245) converts the test cell into the serial data differential signal, and transmits the serial data differential signal to the cell multiplexing/demultiplexing device(100). A cell receipt control part(252) requests a state report of the test device(200), and controls the receipt of the control cell and the test cell. A test cell analysis part(254) analyzes the test cell, and transmits the analysis result to the central control circuit part(210). A receipt test cell FIFO part(253) transfers the test cell to the test cell analysis part(254) according to the control signal of the cell receipt control part(252). A receipt control cell FIFO part(255) transfers the control cell to the central control circuit part(210) according to the control signal of the cell receipt control part(252). A TAXI receipt part(251) converts the serial data differential signal into 8 bit parallel data, and outputs the 8 bit parallel data to the receipt test cell FIFO part(253) and the receipt control cell FIFO part(255).