Appendix D. GlossaryD-2 T3SU 300 User Manual 61200217L1-1baud rateA measure of transmission speed over an analog phone line. Baud rate measuresthe shortest signaling elements per second in the analog signal that a modemsends over an analog phone line. Does not necessarily equal the bit rate.BERTbit 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).blue alarm (AIS)An alarm used in T1/T3 transmission. In a T3 circuit, blue alarms occur whenthere is a transmission fault located either at or upstream from the transmittingterminal. A blue alarm is when consecutive 1010s are received in the informationbits.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.
