ACCULINK 336x E1 NTU
Glossary-2
June 1996
3360-A2-GB20-10
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.
CAS
Channel-Associated Signaling. Time-slot 16 is reserved for signaling in a 16-frame
multiframe system. With the exception of time-slot 16, the other time slots do not
need to be directly connected as they are in Common-Channel Signaling (CCS).
CCITT
The International Consultative Committee for Telegraphy and Telephony. (It is now
renamed as the ITU.)
CCS
Common-Channel Signaling. Time-slot 16 is reserved for signaling in a 2-frame
multiframe system. The time slots must be directly connected so that the G.703
DS0 channels are connected to the corresponding network DS0 channels (e.g., D1
to N1, D2 to N2, etc.).
CD
Carrier Detect. The received line signal detector. V.24 circuit 109.
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 NTU to specific interfaces (HDSL
Network, G.703 DTE, etc.).
CHAP
Challenge Authentication Protocol.
character
A letter, figure, number, punctuation, or other symbol.
CID branch
Customer Identification branch or the E1 NTU 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 NTU.
ClrReg branch
Clear Performance Registers branch of the E1 NTU menu tree.
Cnfig branch
Configuration branch of the E1 NTU 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 NTU.
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.
control unit
A unit that exerts control over another unit.
CPU fail
Central Processing Unit failure. A Self-Test Health message indicating a failure in
the device’s central processing unit.
