61204659L1-1A E-1A PPENDIX E, G LOSSARYAPPENDIX EGlossary10Base-T Ethernet connector which implements the IEEE standard on 24-gauge, unshieldedtwisted -pair wiring.AAMI Alternate mark inversion. A bipolar line-coding format in T1 transmissionsystems whereby successive ones are alternately inverted.ANSI American National Standards Institute. A non-profit organization that coordinatesvoluntary standards activities in the United States.asynchronous A method of data transmission which allows characters to be sent at irregularintervals by preceding each character with a start bit, followed by a stop bit.Bbandwidth The bandwidth determines the rate at which information can be sent through achannel (the greater the bandwidth, the more information that can be sent in agiven amount of time).baud rate A measure of transmission speed over an analog phone line. Baud rate measuresthe shortest signaling elements per second in the analog signal that a modem sendsover 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 STS-1,T3, T1, FT1, and DDS circuits.bipolar A signal containing both positive and negative amplitude components.bipolar violation See BPV.bit A binary digit representing a signal, wave, or state as either a one or a zero. A bitis 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.bit rate The speed at which bits are transmitted, usually expressed in bits per second (bps).bps Bits per second. The number of bits passing a specific point per second. Examplesof common rates are kbps (one thousand bits per second) and Mbps (one millionbits per second). T3 operates at 44.736 Mbps. STS-1 operates at 51.84 Mbps.
