ADTRAN MX2800 M13 Manual de usuario descargar pdf (Pagina 181)

61200290L1-1H E-1

Appendix E

Glossary

10Base-T Ethernet connector which implements the IEEE standard on 24-

gauge, unshielded twisted-pair wiring.

AMI Alternate Mark Inversion. A bipolar line-coding format in T1 trans-

mission systems whereby successive ones are alternately inverted.

ANSI American National Standards Institute. A nonprofit organization

that coordinates voluntary standards activities in the United

States.

asynchronous A method of data transmission which allows characters to be sent

at irregular intervals by preceding each character with a start bit

followed by a stop bit.

bandwidth The bandwidth determines the rate at which information can be

sent through a channel (the greater the bandwidth, the more infor-

mation that can be sent in a given amount of time).

baud rate A measure of transmission speed over an analog phone line. Baud

rate measures the shortest signaling elements per second in the

analog signal that a modem sends over an analog phone line. Does

not necessarily equal the bit rate.

BERT Bit error rate test. A test that uses any of a number of stress

patterns to test T3, T1, FT1, and DDS circuits.

bipolar A signal containing both positive and negative amplitude compo-

nents.

bipolar violation See “BPV”.

bit A binary digit representing a signal, wave, or state as either a one

or a zero. A bit is the smallest unit of information a computer can

process.

bit error The receipt of an encoded bit that differs from what was sent by the

transmitter.

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ADTRAN MX2800 M13 Manual de usuario Pagina 181