Refers to the error occurring 2 or more bits 2 bit up because interference occurs, there may be periods of time. So it can cause errors of more than 1 bit that .
Represents the error that occurs more than 2 2-bit size or bit more due to the interference that occurs, there may be powerful over time, which for a long time. Therefore it can be causes error of data on more than 1 bit exerted .
Indicates that an error has occurred, a 2-bit or more than 2-bit, as the signal to noise at occur there may be a long period, so it can be make an error of more than 1-bit information. It was