Testing device for a local area network with carrier sense access and collision detection (CSMA/CD)

摘要

Testing device (TESTI) for a local network (RLE, RLS) of the type with carrier test access and collision detection (CSMA/CD) and with bus-architecture transmission system (BUS), the network (RLE-RLS) comprising at least one elementary segment (SE1, ... SEp) comprising a plurality of stations (S1, S2, ..., Si, ..., Sn). …??According to the invention, the testing device is characterised in that it comprises a transmission and reception circuit (CERI) similar to those of the stations, including in addition a device for generating collisions (GENCOLI) which transmits one information frame once it has received, from the encoding and decoding circuit (ENCDECI) associated with the transmission and reception circuit, a signal CRS1- CRS2 indicating the presence of a transmission of a frame by any station other than itself, and a transmission command REM from the transmission control circuit, the latter frame being received by the encoding and decoding circuit (ENCDECI). …??Usable in local networks. …IMAGE…