Title:
【発明の名称】ISDNインタ―フェ―スの回線試験装置
Document Type and Number:
Japanese Patent JP2540186
Kind Code:
B2
Abstract:
PURPOSE:To test the adequacy of a communication protocol or the like by providing the 1st system sending a data to a terminal equipment while being multiplexed on a D channel and the 2nd system applying processing to the D-channel and sending the data to a network device. CONSTITUTION:A digital signal from a network device 2 to a terminal equipment 3 is separated into a D channel signal D1 and B channel signals B11, B12 by the 1st frame reception circuit 39 while talking frame synchronization for a timing signal CLK1. Then the 1st processing circuit 40 applies processing with respect to an LAPD frame to the signal D1 and the result is written in a memory 41. The data read from the memory 41 applies the processing relating to the LAPD and the signal is multiplied based on the signals B11, B12 and the signal CLK1 in the 1st frame transmission circuit 44 and the result is sent to the equipment 3. The digital signal from the equipment 3 to the equipment 2 is subjected to processing similarly via a 2nd frame reception circuit 47, a 2nd processing circuit 43 and the memory 41 and a 2nd frame transmission circuit 48, and sent to the equipment 2.
Inventors:
YOKOTA KAZUYUKI
Application Number:
JP9414188A
Publication Date:
October 02, 1996
Filing Date:
April 15, 1988
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04M3/22; H04L12/26; (IPC1-7): H04M3/22; H04L12/26
Attorney, Agent or Firm:
Yoshihiro Morimoto