A bit that is transferred from the source to the destination within the assigned time slot, but that, when delivered, is of a different value from that sent from the source. [After T1.503-1989] [After T1.507-1996]

Deprecated term. See bit error ratio.

A test performed on a digital facility/service which counts erroneous bits and divides them by the bits sent over a set period of time. Usually expressed as a power of 10 e. g. (1 x $ 10 sup -6 $).

1. The number of erroneous bits divided by the total number of bits transmitted, received, or processed over some stipulated period.
Note 1: Examples of bit error ratio are (a) transmission BER, i.e., the number of erroneous bits received divided by the total number of bits transmitted; and (b) information BER, i.e., the number of erroneous decoded (corrected) bits divided… (Read More →)

A testing device that compares a received data pattern with a known transmitted pattern to determine the level of transmission quality.

A method of error monitoring. If even parity is used, an N bit code is generated by the transmitting equipment over a specified portion of the signal in such a manner that the first bit of the code provides even parity over the first bit of all N-bit sequences in the covered portion of the signal, the second bit provides… (Read More →)

See bit, character interval, unit interval.

1. The changing of the state of a bit to the opposite state.
2. The changing of the state that represents a given bit, i.e., a 0 or a 1, to the opposite state.
Note: For example, if a 1 is represented by a given polarity or phase at one stage in a circuit, the 1 is represented by the… (Read More →)

In embedded ADPCM (adaptive differential pulse-code modulation), the process of discarding the enhancement bits. [T1.310-1991]

The practice of establishing, within a code set, a number of subsets that have an identical bit representation except for the state of a specified bit.
Note: An example of bit pairing occurs in the International Alphabet No.5 and the American Standard Code for Information Interchange (ASCII), where the upper case letters are related to their respective lower case letters… (Read More →)