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ACCULINK 317x E1 DSU/CSU
Glossary-2 December 1996 3170-A2-GB20-20
bit Binary digit. The smallest unit of information, representing a choice between a one
or a zero (sometimes called mark or space).
block allocation method A method of allocating DS0 channels as a group rather than individually.
BNC Bayonet-Neill-Concelman. A bayonet-type connector for coaxial cables.
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 small group of bits (usually 8) that is handled as a unit of data.
CCITT The International Consultative Committee for Telegraphy and Telephony
. A
committee established to recommend communication standards and policies.
CD Carrier Detect. The received line signal detector
. V
.24 circuit 109.
cell site
A facility that provides the equipment needed to establish wireless communication
links.
CEPT The European Conference of Postal and Telegraph Authorities. A European
standards or
ganization.
channel
An independent data path.
channel allocation
Assigning specific DS0 channels in the E1 DSU/CSU to specific interfaces
(Network, DTE Drop/Insert, etc.).
CHAP Challenge Authentication Protocol.
character A letter, figure, number, punctuation, or other symbol.
CID branch
Customer Identification branch or the E1 DSU/CSU menu tree.
client
A device that receives a specific service, such as database management, from a
server.
CLOCK IN interface
The external clock interface on the E1 DSU/CSU.
ClrReg branch Clear Performance Registers branch of the E1 DSU/CSU menu tree.
Cnfig branch Configuration branch of the E1 DSU/CSU menu tree.
coaxial cable
A transmission cable consisting of a conducting outer tube which encloses and is
insulated from an inner conducting core.
coding
A technique used to accommodate the ones density requirements of E1 lines.
COMCODE A code used when ordering parts.
COM port The communications port on the E1 DSU/CSU.
community name
An identification used by SNMP to grant an SNMP server access rights to a MIB.
configuration The arrangement of a system or network as defined by the characteristics of its
functional units.
configuration option Device firmware that establishes specific operating parameters for the device.
Sometimes referred to as straps.
CPU fail Central Processing Unit failure. A Self-T
est 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.
CRC4
CRC using four check bits.
CRC5
CRC using five check bits.