| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a line monitoring device capable of discriminating a receiving order between receiving frames on T side and R side at high speed when analysis and screen display are performed in real time by an upper layer protocol. SOLUTION: A T line 5 is monitored by a line monitoring circuit 2a on the T side of a line processing part 2, an R line 6 is monitored by a line monitoring circuit 2b on the R side and the monitored lines are converted into a PDU(protocol data unit) frame format. The line monitoring circuit 2a at the T side and the line monitoring circuit 2b at the R side are independently transferred to a space which is divided into the T side and the R side of shared memory 3a of a common processing part 3 by DMA(direct memory access) transfer and written in the space. The written PDU frame data is read by a CPU 3b for analysis in the common processing part 3, analyzed in real time and the a protocol of the PDU frame data is analyzed in real time by a main body part CPU 4a of a main body part 4.</p> |
