Triple DES or TDES; A block cipher formed from the DES cipher by using it three times.

Access Bridge Port; Ethernet port configured as access bridge port. Ethernet traffic is not VLAN tagged.

Authentication, Authorization, Accounting; Authentication refers to the process of establishing the digital identity of a client to a server. Authorization refers to the granting of specific types of privileges to a user. Accounting refers to the tracking of the consumption of network resources.

Control bits transported via the channel associated signaling (CAS).

Accessory; Extension of the short name describing the category of the short named item.

Attachment Circuit; The physical or virtual circuit attaching a CE to a PE. In case of a CEPI1 unit, the AC is an unstructured P12 signal connected to a physical circuit located on the same or another service unit inside a FOX61x.

Associated Channel Header

Access Control Lists

Application Definition File (xml formatted) that describes the data structure of the corresponding unit ESW.

Alarm Escalation

Advanced Encryption Standard; A block cipher adopted as an encryption standard.

Assured Forwarding

Authentication Header; Intended to guarantee connectionless integrity and data origin authentication of IP datagrams.

Alarm Indication Signal; An all ones signal sent down or up stream by a device when it detects an error condition or receives an error condition or receives an error notification from another unit in the transmission path.

Answer tone, amplitude modified

Access Point; Addressable part of a managed object, e.g. a port.

Angled Physical Contact

Application Programm Interface

Automatic Protection Switching; Protects section or trails/paths in the network by switching traffic to a protecting section/trail in case of failure of the active section/trail.

Address Resolution Protocol; IP protocol used to translate IP addresses into Ethernet addresses.

Acceleration Spectral Density

Application Service Data Unit

Autonomous System Number

Asynchronous Transfer Mode

Background Block Error

Broadcast

Best Effort

Bit Error Ratio; A measure of transmission quality. It is generally shown as a negative exponent, (e.g., 10-7 which means 1 out of 1E+7 bits are in error or 1 out of 10,000,000 bits are in error).

Bit Error Rate Test

Bidirectional Forwarding Detection

Border Gateway Protocol

Busy Hour Call Attempt; Conventionally, the capacity of a telephone switching system is measured by the maximum number of call attempts per hour (during busy hour of the day) that can be handled by the system. This measure is referred to as BHCA.

GOOSE Proxy Gateway for Teleprotection Commands, Packet Services, 4 Ports.

Background traffic

Business Logic Manager

Best Master Clock

Broadband Network Gateway

Basic Package

Bridge Protocol Data Units; A message type used by bridges to exchange management and control information.

The terms «bridging» and «switching» are used as synonyms.

Binary Signal

Bandwidth

Customer VLAN

Certificate Authority

Content Addressable Memory

Channel Associated Signaling; A form of circuit state signaling in which the circuit state is indicated by one or more bits of signaling status sent repetitively and associated with that specific circuit.

Category

Common Bonding Networks

Committed Burst Size

Hitachi Energy proprietary bus system for control, timing and powering

Continuity Check

Continuity Check Message

Coupling Decoupling Network

Customer Equipment / Customer Edge / Crypto Engine

Called terminal identification

Circuit Emulation Manager

E1 circuit emulation service unit of the FOX61x. 8 E1 ports, 8 P12 transport capacity over Ethernet.

Circuit Emulation Service

Core unit for the FOX61x, 5 Ethernet ports (2xSFP, 3xElectrical), 2 synchronization ports.

Core unit for the FOX61x. The CESM1-F is functionally identical to the CESM1 unit but can be operated in FOX61x subracks with passive cooling.

Core unit for the FOX61x, 5 Ethernet ports (4xSFP, 1xElectrical), 2 synchronization ports.

Core unit for the FOX61x. The CESM1-F is functionally identical to the CESM1 unit but can be operated in FOX61x subracks with passive cooling.

Core unit for the FOX61x, 5 Ethernet ports, 2 synchronization ports, external time reference ports.

Circuit Emulation Service over Ethernet

Circuit Emulation Service over Packet

Circuit Emulation Service over Packet Switched Network

Circuit Emulation Timing

Centralized Ethernet switching function within the FOX61x. Synonym to “FOX61x Switch”.

Committed Information Rate

Common and Internal Spanning Tree

Controlled Load

Command Line Interface

Comfort Noise Generation; Complementary to the transmit-side VAD, a comfort noise generator (CNG) is a receive-side device. A CNG generates a local noise signal that it presents to the listener during silent periods.

Complex Node Representation; A collection of nodal state parameters that provide detailed state information associated with a logical node.

Common Object Request Broker Architecture

Class of Service; Tagging system on Ethernet frames which allows to differentiate class of services. IEEE 802.1p

SIP gateway functional unit of the FOX61x with a capacity of up to 1216 user ports.

Customer Premises Equipment; General term for equipment at the customer site, including xDSL modems or home gateways.

Custom Parameter Set

Central Processing Unit

Cyclic Redundancy Check; A mathematical algorithm that computes a numerical value based on the bits in a block of data. This number is transmitted with the data and the receiver uses this information and the same algorithm to insure the accurate delivery of data.

Class Selector

Carrier Sense Multiple Access/Collision Detection

Configuration Software Tool

Class Type

Connection Termination Point

Core Unit (CESM1, CESM2 or CESM3)

Continuity Verification

Customer VLAN Port

Control Word

Coarse Wave Division Multiplexing; Coarse Wave Division Multiplexing combines up to 16 wavelengths onto a single fiber. CWDM technology uses an ITU standard 20nm spacing between the wavelengths, from 1310 nm to 1610 nm.

Direct Attached Cable

Doubly Attached Node

Doubly Attached Node implementing PRP

TDM SHDSL service unit of the FOX61x, 8 ports. Remote powering of DTEs.

Database

Data Communication Channel

Data Circuit-terminating Equipment

Data Communication Network

Digital Diagnostics Mode; This allows the user to monitor real-time parameters of the SFP modules.

EFM SHDSL service unit of the FOX61x, 24 ports.

EFM SHDSL service unit of the FOX61x, 24 ports. DEFM1-F is functionally identical to the DEFM1 unit, but can be deployed in FOX61x subracks with passive cooling.

Drop Eligibility Indicator

Data Encryption Standard; A method for encrypting information (also called a cipher)

German Institute for Standardization

Centralized key management system responsible for the generation and distribution of the Master Keys used by Crypto Engines.

DIRAC Key Manager

Delay Measurement

DIRAC Network Management System

Domain Name System

The direction from the trunk port (of the core unit) towards the subscriber, or towards a subtending node.

Digital Signature Algorithm; A Federal Information Processing Standard (FIPS) for digital signatures

Differentiated Services Code Point

Digital Subscriber Line; Digital Subscriber Line, may stand for ADSL, ADSL2, ADSL2+, SHDSL, or VDSL2.

Digital Subscriber Signaling System No. 2; B-ISDN UNI Signaling

Data Terminal Equipment

Desktop Modular

Desktop Modular Metal housing

Dual Tone Multi-Frequency

Dense Wave Division Multiplexing

Digital Cross Connect

Secured point-to-multipoint service based on rooted-multipoint EVC, enabling sites with hub and spoke multipoint connectivity

E&M signaling interface number 1

E&M signaling interface number 2

64 kbit/s physical signal according to ITU-T G.703

2048 kbit/s signal interface according to ITU-T G.703

Element Agent; Part of the EM communicates with the individual NEs on one side and with the active GUIs and CLIs on the other side.

Extensible Authentication Protocol over Local Area Network

Engineering Bulletin

Errored Block; A block of data with one or more bit errors.

Excess Burst Size

Echo Canceler

Elliptic Curve Cryptography; Embedded Communication Channel, System integrated data channel for the management communication of the FOX61x.

Extended Depth Cover for FOX61x subracks; An extended depth front cover is required for the operation of units with electrical or optical Ethernet ports.

Excellent Effort

Ethernet Equipment Clock

Expedited Forwarding

Extra High Voltage

Excess Information Rate

Enhanced Internal Sublayer Service; (see ISS), used by VLAN-aware nodes. This is the normal case in networks where FOX61x is operated.

Ethernet switching service unit of the FOX61x, 24 electrical ports.

Ethernet Local Management Interface

Element Manager

Electromagnetic Compatibility

Electro Magnetic Interference

European Norm

Ethernet Networking Package

Ethernet OAM

Ethernet over SDH

Ethernet WAN port extension unit of the FOX61x, 4x 1 or 10 GbE SFP+ ports, 1x 40 GbE QSFP1 port.

Ethernet Private Line

Ethernet Switching Unit with 12 electrical ports supporting PoE

Ethernet routing and switching unit of the FOX61x, Ethernet transport over PDH.

Equipment Protection; Feature that allows a HW redundancy by using two units of the same type.

Explicit Route Order

Ethernet routing service unit of the FOX61x, 12 electrical/optical Ethernet ports, 4 virtual router instances and up to 256 virtual router interfaces.

Ethernet routing service unit of the FOX61x. EROP1-F is functionally identical to the EROP1 unit, but can be deployed in FOX61x subracks with passive cooling.

Ethernet Ring Protection

Ethernet Ring Protection Switching

Errored Second; Second with one or more Errored Blocks.

Electrostatic Discharge

Electrical Synchronization Input

Ethernet Synchronization Messaging Channel

Electrical Synchronization Output

Ethernet stand-alone switching service unit of the FOX61x, 12 electrical/optical ports.

Ethernet stand-alone switching service unit of the FOX61x. ETOP1-F is functionally identical to the ETOP1 unit, but can be deployed in FOX61x subracks with passive cooling.

Encapsulating Security Payload; Provides origin authenticity, integrity, and confidentiality protection of IP datagrams.

Ethernet stand-alone switching service unit of the FOX61x, 12 electrical ports supporting PoE.

Embedded Software; Application software that is downloaded and runs on FOX61x core units or service units.

Ethernet

Ethernet switching service unit of the FOX61x, 12 electrical/optical ports.

Ethernet switching service unit of the FOX61x. ETOP1-F is functionally identical to the ETOP1 unit, but can be deployed in FOX61x subracks with passive cooling.

External Time Reference

European Telecommunications Standards Institute

Ethernet Virtual Connection; As defined in the Metro Ethernet Forum specification 10.1.

Ethernet Virtual Private LAN

Ethernet Virtual Private Tree

Ethernet Virtual Private Line

Experimental bits in the MPLS header

Fan unit for the FOX615 R2 and FOX615 subrack.

Alarm unit for the FOX615 R2 and FOX615 subrack.

Fan unit for the FOX612 subrack.

Alarm unit for the FOX612 subrack.

Fan unit for the FOX611 subrack.

Alarm unit for the FOX611 subrack.

Frame Check Sequence; Any mathematical formula which derives a numeric value based on the bit pattern of a transmitted block of information and uses that value at the receiving end to determine the existence of any transmission errors.

Filtering Database

Forwarding Database

Fast Ethernet

Far End Cross Talk

First In First Out; Memory type

Federal Information Processing Standard

Foreign Object

Universal Multiplexer family, multi-service access node of Hitachi Energy

Universal Multiplexer, multi-service access node of Hitachi Energy

Compact Ethernet / MPLS-TP Multiplexer

Subrack of the FOX61x platform with 4 slots capacity.

Subrack of the FOX61x platform with 8 slots capacity.

Subrack of the FOX61x platform with 21 slots capacity.

Subrack of the FOX61x platform with 21 slots capacity.

FOX61x is the name of the full hybrid multi-service access and transport platform for the mission critical market.

FOX61x Local Craft Terminal (GUI).

FOX Network Manager

Functional Protective Earth

Field Programmable Gate Array

Fully Qualified Domain Name

Frequency Shift Keying; FSK is a modulation technique used by modems in which two different frequencies in the carrier signal are used to represent the binary states of 0 and 1.

File Transfer Protocol

Function Unit; Extension of the short name describing the category of the short named item.

Software Full Version; Extension of the short name describing the category of the short named item.

Firewall; Forward

Foreign Exchange Office; Analog voice interface pointing to the office (e.g. local exchange).

Foreign Exchange Subscriber; Analog voice interface pointing to the subscriber (e.g. telephone set).

Generic associated Channel

G-Ach Label

Generic Attribute Registration Protocol

Gigabit Ethernet

Galois Counter Mode

Generic Framing Procedure

GARP Multicast Registration Protocol

Ground

Generic Object Oriented Substation Events

Gigabit-capable Passive Optical Network

Global Positioning System

Google Remote Procedure Calls

Graphical User interface

Gateway

Hierarchical Virtual Private LAN Service (mesh / spoke)

High-Level Data Link Control; An ITU-T link layer protocol standard for point-to-point and multi-point communications.

High Frequency

Higher-Layer Manager

Horizontal Pitch; = 5.08 mm

Hierarchical Quality of Service

High-availability Seamless Redundancy (IEC 62439-3)

Hyper-Text Transfer Protocol

Hyper-Text Transfer Protocol Secure

Height Unit; Corresponds to 44.45 mm. Basic measure used with the 19-inch construction practice.

In E-Tree toppologies, a VPLS node used to transport the service traffic from Leaf nodes to the Root(s). A Hub node shall not have any UNI ports connected to the bridge. If such ports are present, the user must manage them individually (logic to set all rate limiters for Leafs and Roots will not be applied here).

Hardware; In the Letter of Limitations tables the “embedded software” (ESW) and the “hardware” (HW) items are specified in the same column. For the clear distinctions from ESW the hardware is specified in brackets [HW].

Internal Communication

Internet Control Message Protocol; Integrated part of the IP suite, used to announce network errors or network congestion and for some network management commands e.g. “ping”.

Internal Communication Network

Identifier

Information Element; Used in the V5 context for the standardized description of V5 features.

International Electrotechnical Commission

Intelligent Electronic Device

Institute of Electrical and Electronic Engineers; A worldwide engineering publishing and standards-making body for the electronics industry.

Interface

Internet Facsimile Protocol; Fax data format (control and image) according to ITU-T, T.38.

Internet Group Management Protocol

Internet Key Exchange

Impulse Noise Protection

Internet Protocol

Internet Protocol Control Protocol

IP over Ethernet

IP Security

Internet Protocol based Television; Stands for TV programs that are distributed over the Internet using the IP protocol.

Internet Protocol version 4 or 6

ISDN Basic rate Access

International Telecommunication Union

Independent VLAN Learning; In a bridged VLAN, MAC address learning is performed individually for each VLAN.

Jitter Buffer

Live conductor

(Ethernet) Layer 2

L2 Virtual Private Network

Link Aggregation Control Protocol according to IEEE 802.3ad, used to bundle several physical ports together to form one logical port.

Link Aggregation Group

Local Area Network

Link Access Procedure on the D channel; A layer 2 protocol defined by ITU-T Q.920. This protocol reliably transfers blocks of information across a single Layer 1 link and supports multiplexing of different connections at Layer 2. LAPD according to ITU-T, Q.921 is e.g. used with ISDN BA (D-channel).

Local Connector, a fiber optical connector type. Link Connection.

Link Capacity Adjustment Scheme; Protocol that allows bandwidth to be added or removed to a Virtual Concatenated Group (VCG) from the management system. ITU-T G.7042.

Link Control Protocol

Local Call Routing

Local Craft Terminal

Local Exchange; The local exchange provides the analog telephone and ISDN services.

In E-Tree toppologies, a VPLS node to which edge devices are connected. Usually source of SCADA measurements (substation), CCTV signal or receiver of the PTP signal. A Leaf node has UNI ports connected to the bridge.

G.703 E0 (64 kbit/s) co-directional interface service unit of the FOX61x, 8 ports (with leco1 ESW). G.703 E0 (64 kbit/s) contra-directional interface service unit of the FOX61x, 2 ports (with leca1 ESW).

Light Emitting Diode

E&M voice frequency interface service unit of the FOX61x, 8 ports 2-wire or 4-wire. Voice conference.

G.703 E1 (2048 kbit/s) interface service unit of the FOX61x, 8 ports.

TDM service unit of the FOX61x with 4 multi-protocol serial interfaces: X.24/V.11, V.24/V.28; V.35; RS485 4-wire, RS485 2-wire - configurable, point-to-point and (multi-) point-to-multipoint operation, one 10/100 Base-T Ethernet interface. Data conference.

Label Edge Router

POTS Foreign Exchange Subscriber (FXS) interface service unit of the FOX61x, 16 ports 2-wire analog.

POTS Foreign Exchange Office (FXO) interface service unit of the FOX61x, 12 ports 2-wire analog.

Link Layer Discovery Protocol

Link Loss Forwarding

Loss Of Continuity

Letter of Limitations; Description of the known limitations of functions and features.

Loss of Signal; A condition at the receiver or a maintenance signal transmitted in the PHY overhead indicating that the receiving equipment has lost the received signal. This is used to monitor the performance of the PHY layer.

Linear Protection Switching

Link State Advertisement; Packet containing information about each of the links to its neighbors to every other router.

Label Switched Path

Label Switched Path Ping

Label Switch Router

Line Termination

Linear trail protection

Maintenance Association

Media Access Control

Maximum Allocation Model

Media Attachment Unit

Matrix Connection

Mercury Channel Associated Signaling

Management Communication Channel

Modified Coded Mark Inversion

Management Communication Network

Message-Digest Algorithm 5

Main Distribution Frame

Medium Dependent Interface

MDI-Crossed

In E-Tree topologies: Mesh Split Horizon role

Maintenance Entity

Metro Ethernet Forum; A non-profit organization chartered with the mission of accelerating Worldwide Adoption of Carrier class Ethernet Networks and Services.

Maintenance Entity Group; comprises one or several MEs.

Media Gateway Control protocol

Maintenance Entity Level; Mercury Exchange Limited

MEG End Point; An end point of a single MA, and an end point of a separate ME for each of the other MEPs in the same MA. It is an actively managed CFM entity, associated with a specific SAP of a service instance.

Management Function; Predefined category of management operations, e.g. configuration, status, etc

Multi-Frame

Management Information Base

MEG Intermediate Point

Multi-Link PPP (Point-to-Point Protocol)

Multiple MAC Registration Protocol

Manufacturing Messaging Specification

Managed Object; Management view of a resource of the NE.

Managed Object Model

Multipoint-to-multipoint application

Multi Protocol Label Switching

MPLS Transport Profile

Multiple Registration Protocol

Multi Source Agreement

Multiple Subscriber Numbers

Multiplex Section Protection

Multiple Spanning Tree Instance

Multiple Spanning Tree Protocol

Mean Time Between Failures

Maximum Time Interval Error

Mean Time To Failure

Maximum Transmission Unit; Maximum size of a data packet (number of octets) that is allowed for the medium (network).

Neutral conductor

Not applicable (or not available)

Network Address Translation

Northbound Interface; An interface of a management system to a higher level management system.

Network Control

Non CRC4 Interworking

Network Element; Generic term for managed elements in a network. Example: FOX615

Network Element Clock

Network Element Manager

Network Element Timing Generator

Next Generation Network; The NGN architecture separates the control, media and transport mechanism in the networks. Media Gateway Controller (MGC) and Media Gateways (MG) are two important elements in providing voice delivery in NGN.

Nodal Interworking Function

National Institute of Standards and Technology

Non-Linear Processor

Network management system; Common term which refers to the management platform to control and manage complete networks. Communication with the NE is based on telnet or SSH.

Networking Package

No Request

Network Termination; Network Termination represents the termination point of a Virtual Channel, Virtual Path, or Virtual Path/Virtual Channel at the UNI.

Network Termination 1

Network Time Protocol

Network Termination Unit

Operation, Administration, and Maintenance; A group of network management functions that provide network fault indication, performance information, and data and diagnosis functions.

Optical teleprotection interface unit for distance protection, packet transport.

Optical Distribution Network

Outage Intensity

(SNMP) Object Identifier; Object identifiers uniquely identify managed objects in an MIB hierarchy. An address used to identify devices and their status.

Optical Line Termination

Optical Network Termination

Optical Network Unit

Optical teleprotection interface unit for differential protection, TDM transport.

Optical teleprotection interface unit for differential protection, packet transport.

Operating System; Operating system (and version) required to run the specified application software. The application software is released for the specified OS only.

Open Shortest Path First; A link-state routing algorithm that is used to calculate routes based on the number of routers, transmission speed, delays and route cost.

Operation Support System

Optical Transport Network

Organizationally Unique Identifier

In the oversampling transmission mode, the DCE signal is sampled with a fixed timing signal. The fixed timing signal should have a frequency at least three times higher than the user data rate.

Logical layer of the 64 kbit/s traffic signal

n concatenated P0 time slots preserving time slot sequence integrity

Logical layer of the 2048 kbit/s traffic signal with or without a structure according to ITU-T G.704

Point-to-multipoint application with one master DTE and several slave DTEs

Point-to-point application

Private Automatic Branch Exchange; A subscriber-owned telecommunications exchange that usually includes access to the PSTN.

Phase Amplitude Modulation

Provider Backbone Bridge

Provider Backbone Bridge Traffic Engineering

PDH bus in FOX61x

Private Branch Exchange; The term given to a device which provides private local voice switching and voice-related services within the private network.

Printed Circuit Board

Pulse Code Modulation; An audio encoding algorithm which encodes the amplitude of a repetitive series of audio samples. This encoding algorithm converts analog voice samples into a digital bit stream.

Priority Code Point

Plesiochronous Digital Hierarchy; Developed to carry digitized voice over twisted pair cabling more efficiently. This evolved in Digital Hierarchies with only a discrete set of fixed rates available, namely, nxDS0 (DS0 is a 64 kbit/s rate) and the next levels in the multiplex hierarchies.

Protocol Data Unit; Structured information that is delivered as a unit between peer entities of a network.

Provider Edge, a device that provides PWE3 to a CE. Protective Earth.

Product Engineering Code; The Hitachi Energy Product Engineering Code technically identifies and describes the product, its state and evolution. The PEC cannot be used for ordering or other commercial purposes.

Plesiochronous Equipment Timing Source; Timing system for PDH traffic signals and equipment. In the FOX61x the PETS also handles the SyncE timing and the PTP timing.

Per Hop Behavior

Physical Layer

Public Key Infrastructure

Packet Loss Concealment

Phase Locked Loop; Phase Lock Loop is a mechanism whereby timing information is transferred within a data stream and the receiver derives the signal element timing by locking its local clock source to the received timing information.

Performance Management

Performance Monitoring Time Slot

AC/DC power module for the FOX611 subrack

Power over Ethernet; Provisioning of power for (remote) units via electrical Ethernet interfaces (IEEE 802.3af).

Plain Old Telephone System

Point-to-Point Protocol

Pulse Per Second

Primary Rate Access

Pseudo Random Binary Sequence

Primary Reference Clock

One of the IEEE 802.1p priorities: (0) Best Effort, (1) Background, (2) Spare, (3) Excellent Effort, (4) Controlled Load, (5) Video, (6) Voice, (7) Network Control

Parallel Redundancy Protocol (IEC 62439-3)

PHB Scheduling Class

Protection State Coordination; Protocol used for protection switching with MPLS-TP.

Packet Switched Network; Within the context of PWE3, this is a network using IP or MPLS as the mechanism for packet forwarding.

Public Switched Telephone Network

Precision Time Protocol (IEEE 1588)

Port VLAN Identifier

Pseudo Wire; A mechanism that carries the essential elements of an emulated service from one Provider Edge to one or more other Provider Edges over a Packet Switched Network.

Pseudo Wire Attachment Circuit

Pseudo Wire Emulation Edge to Edge; A mechanism that emulates the essential attributes of service (such as a T1 leased line or Frame Relay) over a PSN.

Queue in Queue; VLAN Tag stacking, 802.1Q that allows providing extra information (Protocol/type, VLAN priority/tag, etc.) into the frame header.

Quality Level; 4-bit code (SSM) indicating the “quality level” of the signal provided for synchronization use.

Quality of Service

QoS & TE (Quality of Service and Traffic Engineering)

Quantum Random Number Generator

Quad Small Form Factor; QSFP is a compact hot-pluggable transceiver used for data communications applications.

Ring Automated Protection Switching

Reverse Layer 2 Gateway Protocol

Remote Authentication Dial In User Service; RADIUS is an AAA protocol for controlling access to network resources

Remote Administration Tool

RPL Blocked

Role-based access control

Remote Defect Indication

Russian Doll Model

Direction from the DCE interface towards the DTE.

Reference; Normally a reference to a FOX61x system release or to a document.

Repetitive Electrical Impulse Noise

Release; Release (version).

REpresentational State Transfer

Request For Comment

Radio Frequency Interference

Routing Information Protocol

Remote Monitoring

Random Number Generator

Restriction of the use of Hazardous Substances

In E-Tree topologies, a parent VPLS node, i.e., a node usually connected to the Operating Center (SCADA) or clock source (for PTP clock distribution). A Root node has UNI ports connected to the bridge.

Reference Publication Format; The RPF notification for NSAP addresses is specified in the ITU-T standard X.213 and represents the NSAP addresses in the format IDP + DSP.

Ring Protection Link

Recommended Standard 232

Named after the three developers Rivest, Shamir, Adleman. An algorithm for public-key cryptography, suitable for signing as well as encryption

Rapid Spanning Tree Protocol

Real-time Transport Control Protocol

Real-Time Protocol

Logical layer of the VC-12 traffic signal. A VC-12 has a transport capacity of 2’176 kbit/s.

Logical layer of the VC-3 traffic signal. A VC-3 has a transport capacity of 48’384 kbit/s.

Logical layer of the VC-4 traffic signal. A VC-4 has a transport capacity of 149’760 kbit/s.

State in Alarm Case

STM-4 SDH transport unit of the FOX61x for TDM and Ethernet traffic. 4 SDH ports and 4 Ethernet ports.

STM-16 SDH transport unit for TDM and Ethernet traffic of the FOX61x. 4 SDH ports and 4 Ethernet ports.

STM-16 SDH transport unit for TDM and Ethernet traffic of the FOX61x. SAMO2-F is functionally identical to the SAMO2 unit, but can be deployed in FOX61x subracks with passive cooling.

STM-16 SDH transport unit for TDM and Ethernet traffic of the FOX61x. 4 SDH ports, 48 E1 ports and 4 Ethernet ports.

STM-4 SDH transport unit for TDM and Ethernet traffic of the FOX61x. 4 SDH ports and 4 Ethernet ports.

STM-4 SDH transport unit for TDM and Ethernet traffic of the FOX61x. SAMO5-F is functionally identical to the SAMO5 unit, but can be deployed in FOX61x subracks with passive cooling.

Singly Attached Node

Structure-Agnostic Time Division Multiplexing (TDM) over Packet

Structure Agnostic TDM over Packet Switched Network

Sub Unit

Signaling Communication Channel

Substation Configuration Language

Signal Degrade

Standard Depth Cover, Standard Depth Cover for FOX61x subrack

Synchronous Digital Hierarchy; The ITU-T International standard for transmitting information over optical fiber.

Session Description Protocol

Set; Extension of the short name describing the category of the short named item.

SDH Equipment Clock

Single Ended Line Test

Safety Extra Low Voltage

Ethernet traffic encryption unit of the FOX61x. The term SENC1 is used to name the SENC1-4, SENC1F4, SENC1-8 or SENC1F8 unit.

Ethernet traffic encryption unit of the FOX61x, 4 ports: 2 encrypted, 2 unencrypted.

Ethernet traffic encryption unit of the FOX61x, 8 ports: 4 encrypted, 4 unencrypted.

Ethernet traffic encryption unit of the FOX61x. SENC1F4 is functionally identical to the SENC1-4 unit, but can be deployed in FOX61x subracks with passive cooling.

Ethernet traffic encryption unit of the FOX61x. SENC1F8 is functionally identical to the SENC1-8 unit, but can be deployed in FOX61x subracks with passive cooling.

Severely Errored Seconds

Synchronous Equipment Timing Generator

Synchronous Equipment Timing Source

Signal Fail

Safety Frame Concept

Small Form Factor

Small Form factor Pluggable

Single-pair High-speed Digital Subscriber Line

Single High Impulse Noise Event

Silence Insertion Descriptor

Signaling Transport

Session Initiation Protocol

Service Level Agreement

Structure of Managed Information; Represents the notation by which an SNMP MIB must be written, i.e. the grammar to write SNMP MIBs.

Sub Network Connection

SNC Protection

Service to Node Interface

Simple Network Management Protocol

Signal to Noise Ratio

Simple Network Time Protocol

In E-Tree topologies, Spoke Split Horizon role

Strict Priority (QoS)

Split-horizon route advertisement is a method of preventing routing loops in distance-vector routing protocols by prohibiting a router from advertising a route back onto the interface from which it was learned.

VPLS node role to define the Leafs in the generic H-VPLS service. This role is not available for E-Tree topologies. During the service "upgrade" Spoke nodes are migrated to Leafs if applicable.

Strict Priority Queuing

Shared Protection Ring

System Release; Used in tables for the specification of FOX61x system releases. In the LoL tables the items “FOXCST” and “system release” (SR) are specified in the same column. For the clear distinction from FOXCST the system release is quoted in square brackets [SR].

Service

Silence Suppression

Signaling System No. 7; A family of signaling protocols originating from narrow-band telephony. They are used to set-up, manage and tear down connections as well as to exchange non-connection associated information.

Secure Shell

Synchronization Status Indication; Indicates whether the data stream can be used as timing source for synchronization or not.

Synchronization Status Message

Synchronization Supply Unit

Synchronous Transport Module

155’520 kbit/s data signal with a structure according to ITU-T G.707

2'488'320 kbit/s data signal with a structure according to ITU-T G.707

622’080 kbit/s data signal with a structure according to ITU-T G.707

Spanning Tree Protocol

Service Unit; Category of FOX61x units that provides traffic services.

Sampled Values

Switch Virtual Interface

Software

The terms «bridging» and «switching» are used as synonyms.

Synchronous Ethernet

Trunk Bridge Port; Ethernet port configured as trunk bridge port. Ethernet traffic is VLAN tagged.

Terminal Adapter

International Atomic Time

TE Alert Signal

Topology Change. Traffic Class

Trellis-Coded Pulse-Amplitude Modulation

Topology Change Notification

Transmission Control Protocol

Temperature Compensated Crystal Oscillator

Time Division Multiplex

Traffic Engineering; Transport Entity; Terminal Equipment

Optical teleprotection interface unit, IEC 61850 GOOSE gateway function, packet transport.

Electrical teleprotection interface unit for distance protection, TDM transport.

Electrical teleprotection interface unit for distance protection, packet transport.

Transport Layer Security

Type Length Value

Telephone Network Voltage hazard level 1

Telephone Network Voltage hazard level 2

Telephone Network Voltage hazard level 3

Time of Day

Type of Service

Termination Point

Teleprotection Equipment

Direction from the DTE towards the DCE interface.

Time Slot

Trail Trace Identifier; Unique identifier assigned to a trail and carried by the traffic signal.

Time To Live

Trail Termination Point

Unavailable Time

Unicast

FOX51x Configuration Software Tool, PC/computer based Element Manager (EM) to manage the FOX51x NEs of Hitachi Energy.

User Datagram Protocol; Part of the TCP/IP protocol suite. Provides a means for applications to access the connectionless features of IP. Operates at layer 4 of the OSI reference model and provides for the exchange of datagrams without acknowledgments or guaranteed delivery.

UDP Transport Layer; Facsimile UDP Transport Layer according to ITU-T, T.38.

User Interface (application interface)

User Network Interface; An interface point between ATM end users and a private ATM switch, or between a private ATM switch and the public carrier ATM network; defined by physical and protocol specifications per ATM Forum UNI documents.

The direction from the subscriber, or from a subtending node towards the trunk port (of the core unit) and further towards the backbone network.

Uniform Resource Identifier

Unavailable Second

Universal Serial Bus

User-based Security Model

Coordinated Universal Time, Universal Time Coordinated

Power Supply Voltage Filtered

Unshielded twisted pair

V5CAS is a proprietary CAS signaling code which is an extension of MCAS (Mercury CAS) and carries out of band PSTN signaling.

Voice Activity Detection; VAD allows a data network carrying voice traffic over a packet network to detect the absence of audio and conserve bandwidth by preventing the transmission of “silent packets” over the network.

Voice Band Data

Voice conferencing

Version; Mainly used to describe the version of hardware components.

Voice frequency processing unit of the FOX61x with up to 2 x 208 echo cancelers for PSTN subscribers.

Video traffic

VLAN ID; A Virtual LAN identifier

Virtual LAN; Virtual Local Area Network

VLAN IDentifier

Voice over IP; Stands for voice services that are delivered using the IP protocol.

Virtual Private LAN Service

Virtual Private Network

Virtual Private Wire Service

Virtual Router Redundancy Protocol

Virtual Switch Interface

Wide Area Network

Watchdog

Wavelength Division Multiplexing

Waste Electrical and Electronic Equipment

Weighted Fair Queuing

Weighted Round Robin

Wait To Restore

All forms of DSL technology, e.g. ADSL, SDSL, SHDSL or VDSL

Extensible Mark-up Language

Zero Message Queuing, communication protocol between DIRAC server and SENC1 Functional Units