Huawei OptiX OSN 550 Configuration Manual page 448

A Glossary and Acronyms
DiffServ
Digital Distribution
Frame
digital signal
Distributed Link
Aggregation Group
DLAG
DM
DNI
domain
DSCP
DSL
DSLAM
DSR
DTE
DTR
Dual Node
Interconnection
DVB-ASI
DVMRP
DWDM
A.6 E
E-AGGR
Ear bracket
ECC
EFM
A-10
A service architecture that provides the end-to-end QoS function. It consists of a series
of functional units implemented at the network nodes, including a small group of per-
hop forwarding behaviors, packet classification functions, and traffic conditioning
functions such as metering, marking, shaping and policing.
A type of equipment used between the transmission equipment and the exchange with
transmission rate of 2 to 155 Mbit/s to provide the functions such as cables connection,
cable patching, and test of loops that transmitting digital signals.
A signal in which information is represented by a limited number of discrete states
number of discrete states (for example, high and low voltages) rather than by fluctuating
levels in a continuous stream, as in an analog signal. In the pulse code modulation (PCM)
technology, the 8 kHz sampling frequency is used and a byte contains 8 bits in length.
Therefore, a digital signal is also referred to as a byte-based code stream. Digital signals,
with simple structures and broad bandwidth, are easy to shape or regenerate, and are not
easily affected by external interference.
A board-level port protection technology used to detect unidirectional fiber cuts and to
negotiate with the opposite end. Once a link down failure occurs on a port or a hardware
failure occurs on a board, the services can automatically be switched to the slave board,
achieving 1+1 protection for the inter-board ports.
See Distributed Link Aggregation Group
See Delay Measurement
See Dual Node Interconnection
A logical subscriber group based on which the subscriber rights are controlled.
See Differentiated Services Code Point
Digital Subscriber Line
Digital Subscriber Line Access Multiplexer
Data Set Ready
Data Terminal Equipments
Data Terminal Ready
DNI provides an alternative physical interconnection point, between the rings, in case
of an interconnection failure scenario.
Digital Video Broadcast- Asynchronous Serial Interface
Distance Vector Multicast Routing Protocol
Dense Wavelength Division Multiplexing
See Ethernet aggregation
A piece of angle plate with holes in it on a rack. It is used to fix network elements or
components.
See Embedded Control Channel
Ethernet in the First Mile
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
Issue 02 (2011-06-30)