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 organization.
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-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.
CRC4
CRC using four check bits.
CRC5
CRC using five check bits.
