Recommendation ITU-T G.826
Recommendation G.826 defines error performance parameters for networks supporting paths which are independent of the physical layer.
Performance Measurement results are divided into Events and Parameters:
Events:
• Errored Block (EB),
• Errored Second (ES),
• Severely Errored Second (SES),
• Background Block Error (BBE),
• Unavailable Time (UT).
Parameters:
• Errored Second Ratio (ESR),
• Severely Errored Second Ratio (SESR),
• Background Block Error Ratio (BBER).