Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 334)

A-2 Access Manager 2000 Manual
AMI See Alternate Mark Inversion.
ANSI American National Standards Institute.
ASCII American National Standard Code for Information Exchange.
Asynchronous A type of transmission that is not related to a specific frequency, or to
the timing of the transmission equipment. Messages are controlled with
start and stop bits from which the receiver calculates the necessary
timing.
Auto-configure Automatic configuration of the serial communication port to match the
device connected to it. Term used to describe either when Access
Manager configures its COM ports or when a node configures its
network management port.
Available Second Any second that is not a failed or unavailable second (UAS).
B
B8ZS See Bipolar Eight-Zero Substitution.
Baud Rate In data transmission, the reciprocal of the length in seconds of the
shortest pulse used; for instance, a system whose shortest pulses are
1/300 second is operating at 300 baud.
BER See Bit Error Rate.
BERS See Bit Error Rate Alarm Seconds.
BES See Bursty Errored Seconds.
Bit A binary digit, either zero or one.
Bit Error Rate The ratio of bits received in error to the total number of bits
transmitted. The time over which this rate is calculated is not inherent
to the definition and can be separately specified. For low error rates, the
Cyclic Redundancy Check (CRC) can be used to estimate the BER,
assuming that not more than one error will occur per ESF.
Bit Error Rate Alarm
Seconds A count of one-second intervals during which a bit error rate alarm
existed.
Term Definition