User's Manual

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1.2 Abbreviations
The abbreviations that are used in this document are defined in Table 2.
Table 2 — Abbreviations.
Abbreviation
Description
CATV
Cable TV.
CE
CE marking is a certification mark that indicates conformity with health, safety, and
environmental protection standards for products sold within the European Economic Area.
CPE
Customer-Premises Equipment or Customer-Provided Equipment.
C-VLAN
Customer VLAN is the VLAN that the customer uses or sees (the inner tag). CVLAN is the VLAN
tag the customer is using on their own devices. (See QinQ.)
DHCP
Dynamic Host Configuration Protocol is an automatic configuration protocol used to
automatically assign IP addresses to devices on a TCP/IP network.
EMC
ElectroMagnetic Compatibility.
FCC
The Federal Communications Commission is an independent agency of the United States
government created by statute to regulate interstate communications by radio, television, wire,
satellite, and cable.
IGMP
Internet Group Management Protocol is a protocol used to establish multicast group
membership.
MAC Address
Media Access Control address is a unique identifier assigned to a Network Interface Controller
(NIC) for communications at the data link layer of a network segment. MAC addresses are used
as a network address for most IEEE 802 network technologies, including Ethernet, WiFi, and
Bluetooth.
MGT
Denotes the Management port on the Controller.
OFDM
Orthogonal Frequency-Division Multiplexing is a method of encoding digital data on multiple
carrier frequencies.
PHY
Physical bit rate.
PPPoE
Point-to-Point Protocol over Ethernet is a network protocol for encapsulating PPP frames inside
Ethernet frames.
QAM
Quadrature Amplitude Modulation is the name of a family of digital modulation methods and a
related family of analog modulation methods widely used in modern telecommunications to
transmit information.
QinQ
An Ethernet networking standard informally known as QinQ, was incorporated into the base
802.1Q standard in 2011. {b} The 802.1Q technology improves the utilization of VLANs by adding
another 802.1Q tag to tagged packets. (See C-VLAN and S-VLAN.)
QoS
Quality of Service is the ability to provide different priority to different applications, users, or
data flows, or to guarantee a certain level of performance to a data flow.
QPSK
Quadrature Phase-Shift Keying.
RoHS
Restriction of Hazardous Substances directive 2011/65/EU {c}. This short for Directive on the
restriction of the use of certain hazardous substances in electrical and electronic equipment, was
adopted in February 2003 by the European Union. It is required to be enforced and became a
law in each member state on 1 July 2006. The RoHS 2 directive (2011/65/EU) is an evolution of
the original directive and became law on 21 July 2011 and took effect on 2 January 2013. It
addresses the same substances as the original directive while improving regulatory conditions
and legal clarity.
SerDes
Serializer/Deserializer is a pair of functional blocks commonly used in high speed
communications to compensate for limited input/output.
SFP/SFP+
Small Form factor Pluggable transceiver. SFP ≤ 1 Gbps and SFP+/Enhanced ≤ 10 Gbps.
SOAP
Simple Object Access Protocol is a protocol for exchanging structured information.
S-VLAN
Service VLAN is the VLAN that the service provider network sees (the outer Q-tag). SVLAN is the
VLAN the service provider puts the entire customer traffic in. (See QinQ.)
TCP/IP
Transmission Control Protocol/Internet Protocol is the architecture for data communication over
networks.
TDD
Time Division Duplex is the topology adopted to make communication between two wireless
devices at one frequency but with two different time instants.