Glossary definition of Bit Error Ratio

Also known as: BER, Bit Error Rate

Bit Error Rate or Bit Error Ratio (BER) is a measure of the accuracy of transmission for digital information in a telecommunications system.

The BER is calculated as the number of bits that were in error, as a proportion of the total number of bits transmitted, or received, or processed over a given period of time. This figure can be used to indicate the Quality of Service for a service provider, and is typically of the order of one error bit in a billion (or 1 in 10 to the power minus 9).