Paradyne ACCULINK 3150, Руководство оператора, Страница: 220 / 234

Glossary
GL-2
March 2001 3150-A2-GB24-10
bandwidth The range of frequencies that can be passed by a transmission medium, or the range of
electrical frequencies a device is capable of handling.
BES Bursty Error Seconds. A second in which more than one but less than 320 CRC6 error
events have occurred.
bipolar signal A signal in which successive ones (marks, pulses) are of alternating positive and negative
polarity, and in which a zero (space, no pulse) is of zero amplitude.
bit
Binary digit. The smallest unit of information, representing a choice between a one or a zero
(sometimes called mark or space).
bps
Bits per second. Indicates the speed at which bits are transmitted across a data connection.
BPV
Bipolar Violation. In a bipolar signal, a one (mark, pulse) which has the same polarity as its
predecessor.
byte A sequence of successive bits (usually eight) handled as a unit in data transmission.
CCITT Consultative Committee on International Telegraphy and Telephony. An advisory committee
established by the United Nations to recommend communications standards and policies. It
was renamed ITU in March 1993.
CD
Carrier Detect. The received line signal detector. V.24 circuit 109.
channel
A bidirectional DS0, voice, or data path, for electrical transmission between two or more
points. Also called a circuit, line, link, path, or facility.
CHAP
Challenge Handshake Authentication Protocol. A security technique that allows a user
password to be encrypted for transmission.
character A letter, figure, number, punctuation, or other symbol.
CID branch Customer Identification branch or the CSU menu tree.
client A device that receives a specific service, such as database management, from a server.
ClrReg branch
Clear Performance Registers branch of the CSU menu tree.
Cnfig branch Configuration branch of the CSU menu tree.
coding A technique used to accommodate the ones density requirements of E1 lines.
community name An identification used by an SNMP manager to grant an SNMP server access rights to a
MIB.
COMSPHERE A proprietary product family name and a registered trademark of Paradyne.
configuration The arrangement of a system or network as defined by the characteristics of its functional
units.
configuration option
Device software that sets specific operating parameters for the device. Sometimes referred
to as straps.
CPU fail Central Processing Unit failure. A Self-Test Health message indicating a failure in the
device’s central processing unit.
CRC
Cyclic Redundancy Check. A mathematical method of confirming the integrity of received
digital data.
CRC6 CRC using six check bits.
CSA
Canadian Standards Association.
CSU
Channel Service Unit. A device that connects service user equipment such as a DSU to the
local digital telephone loop, protects the line from damage, and regenerates the signal.