Patent ID: 8693338

Claim:
A quality measuring system comprising: a first device to transmit Ethernet frames; and a second device to receive said Ethernet frames; wherein said first device transmits a to-be-monitored frame including information indicating a number of total transmitted Ethernet frames addressed to said second device, wherein said second device includes: a receiving unit to receive said to-be-monitored frame from said first device; an extracting unit to extract said information indicating said number of total transmitted Ethernet frames from said to-be-monitored frame; a received frame number measuring unit to measure a number of total received Ethernet frames that said second device receives; a lost frame number operating unit to calculate a number of lost frames based on said number of total transmitted Ethernet frames and said number of total received Ethernet frames; a transmitted bit number measuring unit to measure a number of total transmitted bits of said total transmitted Ethernet frames addressed to said second device; and a bit error ratio operating unit to calculate a bit error ratio based on said number of lost frames and said number of total transmitted numbers.