Appendix D. GlossaryD-2 MX2800 STS-1 User Manual 61200659L1-1BERTBit error rate test. A test that uses any of a number of stress patterns to test T3,T1, FT1, and DDS circuits.bipolarA signal containing both positive and negative amplitude components.bipolar violationSee BPV.bitA 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 errorThe receipt of an encoded bit that differs from what was sent by the transmitter.bit rateThe speed at which bits are transmitted, usually expressed in bits per second(bps).bpsBits per second. The number of bits passing a specific point per second. Exam-ples of common rates are kbps (one thousand bits per second) and Mbps (onemillion bits per second). T3 operates at 44.736 Mbps.BPVBipolar violation. A violation in the alternate mark inversion (AMI) line code forwhich consecutive 1s are represented by pulses of opposite polarity. BPVs thatare not intentional (B8ZS) are counted as errors. Could also be the presence oftwo consecutive 1 bits of the same polarity on the T-carrier line.bridgeA data communications device that connects two or more networks and forwardspackets between them.
