Communication status confirmation system using user data

DETAILED DESCRIPTION What is claimed is: 1.
A communication status confirmation system employing user data on a communication network transmission path employing a logical multiplexing method; and a plurality of data communication devices connected to the transmission path each of the plurality of data communication devices having; first means for reading logical path information in a passing user data frame; second means for setting a flag indicating the presence of the user data frame, for each logical path information; and third means for confirming data flowing in each communication path according to a status of the flag set by the second means.
2.
The communication status confirmation system according to claim 1, wherein the flag set by the second means is cleared periodically in a predetermined period.
3.
The communication status confirmation system according to claim 1, wherein said second means includes a counter per said logical path information and increments a value of an appropriate counter on passing the user data, a counter value of said appropriate counter is read from said first means, and a traffic amount actually communicated in each communication path is obtained according to the contents of the appropriate counter to be read.
4.
A communication status confirmation system using user data on a communication network comprising: a transmission path employing a logical multiplexing method; and a plurality of data communication devices connected to the transmission path each of the plurality of data communication devices having; means for reading information of sender and destination addresses in a passing user data frame; means for storing passing data for each information of said sender and destination addresses read by the means for reading information; and means for reading passing data for each information of said sender and destination addresses from said storing means, and confirming data flowing in each communication path according to the passing data for each information of said sender and destination addresses