44066 000 MEF Terminolgy Database 2013-01-18 Fishburn

P a g e | 1

Terminology Database at Completion the Terminology Ad-Hoc

Terms and Descriptions for Review

Term + (Abbreviation) Description or expanded abbreviations Appears in1DM One-way Delay Measurement Message MEF 353GPP 3rd Generation Partnership Project MEF 22.1A See - Availability MEF 22.1AAL1 ATM Adaptation Layer 1 MEF 8Access EPL See - Access Ethernet Private Line MEF 33Access Ethernet Private Line (Access EPL)

Access EPL service uses a Point-to-Point OVC to associate one OVC End Point at a UNI and one OVC End Point at an ENNI. One UNI can support only a single instance of the Access EPL service

MEF 33

Access Ethernet Virtual Private Line (Access EVPL)

Access EVPL service uses a Point-to-Point OVC to associate one OVC End Point at a UNI and one OVC End Point at an ENNI. One UNI can support one or more Access EVPL instances

MEF 33

Access EVPL See - Access Ethernet Virtual Private Line MEF 33Access Link A link that represents connectivity to External Reference Points of the MEN MEF 2Access Provider (AP) An Operator MEN that offers the Ethernet Access Service type MEF 33ACR Adaptive Clock Recovery MEF 22.1ADM Add Drop Multiplexer MEF 2AF Adaptation Function MEF 12.1aGW Access Gateway in Wimax or LTE networks. Also referred to as Access Service Network (ASN)

Gateway in Wimax and S-GW/MME in LTE. In this IA aGW is one of the options for a RAN NCMEF 22.1

AIS Alarm Indication Signal MEF 3, 8, 20, 25, 30, 31, 38, 39

Alarm Status Indicates the occurrence of an abnormal condition. Values for alarm status include: critical, major, minor, indeterminate, warning, pending, and cleared

MEF 15

All to One Bundling A UNI attribute in which all CE-VLAN IDs are associated with a single EVC MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 29

ALNP Aggregated Line and Node Protection MEF 2ANSI American National Standards Institute MEF 3, 8AP See - Access Provider MEF 33APCP Application Protection Constraint Policy MEF 2API Application Programming Interface MEF 38, 39APP Application Services Layer MEF 4, 12.1, 17APS Automatic Protection Switching MEF 2, 3ASP Application Service Provider MEF 22.1ATM Asynchronous Transfer Mode MEF 4, 8

MEF Terminology Ad-hoc Agreed Terms for Review

P a g e | 2

Term + (Abbreviation) Description or expanded abbreviations Appears inATS Abstract Test Suite MEF 22.1Availability (A) Availability MEF 35Availability flr (Availability flr) Availability flr MEF 35Availability Indicator (Availability Indicator)

Availability Indicator MEF 35

Availability Performance A measure of the percentage of time that a service is useable MEF 6.1, 10.2, 36Availability Window (Availability Window)

Availability Window MEF 35

Backward OAM information sent from the Responder MEP to the Controller MEP. For LM it indicates the frame counts/loss from the Responder MEP to the Controller MEP. For DM is indicates the delay and delay variation from the Responder MEP to the Controller MEP

MEF 35, 36

Bandwidth Profile (BWP) A characterization of Service Frame arrival times and lengths at a reference point and a specification of the disposition of each Service Frame

MEF 6.1, 7, 9, 11, 14, 15, 19, 27, 29, 33

Bandwidth profile per CoS ID A Bandwidth Profile per-Class of Service Identifier MEF 6.1, 23.1, 33Bandwidth profile per EVC A Bandwidth Profile applied on a per-EVC basis MEF 6.1, 23.1Bandwidth Profile per OVC End Point

A Bandwidth Profile applied on a per-OVC End Point basis MEF 23.1

Bandwidth profile per OVC Endpoint

A Bandwidth Profile applied on a per-OVC End Point basis MEF 33

Bandwidth profile per UNI A Bandwidth Profile applied on a per-EVC basis MEF 6.1, 23.1, 33Bandwidth Profile per VUNI A Bandwidth Profile applied on a per-VUNI basis MEF 23.1BBER Background Block Error Ratio MEF 3BBF Broadband Forum MEF 30BER Bit Error Rate MEF 2, 3B-FP Branch Flow Point MEF 12.1BIR Burst Information Rate; rate in bits per second of service frames transmitted, back-to-back with

minimum inter-frame gap. It does not include the inter-frame gap, preamble nor start of frame delimiter. It is called “Burst information rate” because it is equal to the maximum information rate at which bursts can be sent

MEF 37

BLSR Bi-directional Line Switched Ring MEF 2, 3BPDU Bridge Protocol Data Unit MEF 2BR-FP Branch-Root Flow Point MEF 12.1Broadcast Service Frame A Service Frame that has the broadcast destination MAC address MEF 6.1, 7, 9, 10.2, 11, 14, 15,

19, 33BSC Base Station Controller MEF 22.1BSS Business Support System MEF 31, 36, 38, 39BTS Base Transceiver Station MEF 22.1


P a g e | 3

Term + (Abbreviation) Description or expanded abbreviations Appears inBundled OVC A non-Rooted Multipoint OVC that associates an OVC End Point that has more than one S-VLAN ID

value that maps to itMEF 26.1

Bundling A UNI attribute in which more than one CE-VLAN ID is associated with an EVC MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 29

BW Bandwidth MEF 20, 32BWP See - Bandwidth Profile MEF 12.1, 23.1, 37CAS Channel Associated Signaling MEF 3, 8CBS See - Committed Burst Size MEF 6.1, 7, 8, 10.2, 11, 13, 14,

15, 19, 22.1, 23.1, 27, 29, 33CCM Continuity Check Message MEF 20, 25, 30, 31, 36CCS Common Channel Signaling MEF 3, 8CDMA Common Channel Signaling MEF 22.1CE Customer Edge (Equipment on the Subscriber side of the UNI.) MEF 2, 3, 4, 6.1, 7, 8, 9, 10.2, 11,

12.1, 14, 15, 16, 19, 20, 22.1, 23.1, 24, 26.1, 27, 29, 32, 33, 37

CEN Carrier Ethernet Network (used interchangeably with Metro Ethernet Network, MEN). Also referred to as MEN Operator or MEN Service Provider. The entity providing the backhaul service for a Mobile Operator

MEF 12.1, 22.1

CES Circuit Emulation Service(s) MEF 2, 3, 7, 8, 15, 22.1CESoETH Circuit Emulation Services over Ethernet MEF 8CE-VLAN CoS See - Customer Edge VLAN CoS MEF 6.1, 7, 9, 10.2, 11, 13, 14,

15, 19, 23.1, 27, 29CE-VLAN CoS ID Customer Edge VLAN CoS. Also C-tag PCP MEF 33CE-VLAN CoS ID Value Preservation (OVC)

CE-VLAN CoS ID Value Preservation describes a relationship between the format and certain field values of the frame at one External Interface and of the corresponding frame at another External Interface

MEF 33

CE-VLAN CoS Preservation (CE-VLAN CoS Preservation)

CE-VLAN CoS Preservation MEF 6.1

CE-VLAN ID See - Customer Edge VLAN ID MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 27, 29, 33, 34

CE-VLAN ID / EVC Map (CE-VLAN ID / EVC Map)

CE-VLAN ID / EVC Map MEF 6.1

CE-VLAN ID Preservation An EVC attribute in which the CE-VLAN ID of an egress Service Frame is identical in value to the CE-VLAN ID of the corresponding ingress Service Frame

MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 29

CE-VLAN ID Preservation (OVC) CE-VLAN ID Preservation describes a relationship between the format and certain field values of the frame at one External Interface and of the corresponding frame at another External Interface

MEF 33


P a g e | 4

Term + (Abbreviation) Description or expanded abbreviations Appears inCE-VLAN ID/EVC Map An association of CE-VLAN IDs with EVCs at a UNI MEF 7, 9, 10.2, 11, 14, 15, 19, 27

CE-VLAN Tag See - Customer Edge VLAN Tag MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33

CF See - Coupling Flag MEF 6.1, 8, 10.2, 14, 15, 19, 22.1, 23.1, 29, 33

CFM Connectivity Fault Management MEF 20, 30, 31, 36, 38, 39Child Document A MEF Specification that uses the Ethernet Service Constructs model (defined in this specification)

to specify a particular type of EI or ESNMEF 29

CHLI See - Consecutive High Loss Interval MEF 10.21, 22.1, 26.1, 35, 36CI Characteristic Information MEF 4, 12.1CIR See - Committed Information Rate MEF 2, 6.1, 7, 8, 10.2, 11, 13, 14,

15, 19, 22.1, 23.1, 27, 29, 33CIR-compliant Service frames that are compliant with the CIR of the bandwidth profile. CIR-compliant service

frames are colored greenMEF 7, 15

Circuit Emulation Service A service that transports TDM-based traffic over a Metro Ethernet Network MEF 7, 15Class of Service (CoS) A set of Service Frames that have a commitment from the Service Provider to receive a particular

level of performanceMEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 27, 29, 30

Class of Service ("CoS") Label A Class of Service Name. Each CoS Label identifies four Performance Tiers where each Performance Tier contains a set of performance objectives and associated parameters

MEF 34

Class of Service Frame Set (CoS FS)

A set of Service or ENNI Frames that have a commitment from the Operator or Service Provider subject to a particular set of performance objectives

MEF 23.1, 33, 33

Class of Service Identifier (CoS ID) The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given EI

MEF 6.1, 9, 10.2, 14, 19, 29

Class of Service Identifier CoSID Information derivable from a) the EVC to which the Service Frame is mapped or b) the combination of the EVC to which the Service Frame is mapped and a set of one or more CE-VLAN CoS values

MEF 27

Class of Service Identifier for EFO The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to an OVC End Point

MEF 23.1

Class of Service Identifier for EFV The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to a VUNI End Point

MEF 23.1

Class of Service Identifier for ENNI Frames (ENNI)

The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to an OVC End Point

MEF 33

Class of Service Identifier for Service Frames

The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given UNI

MEF 23.1


P a g e | 5

Term + (Abbreviation) Description or expanded abbreviations Appears inClass of Service Identifier for Service Frames (UNI)

The mechanism and/or values of the mechanism to be used to identify the Class of Service Name that applies to the frame at a given UNI

MEF 33

Class of Service Label A CoS Name. Each Class of Service Label identifies four Performance Tiers where each Performance Tier contains a set of performance objectives and associated parameters

MEF 23.1, 33

Class of Service Name A designation given to one or more sets of performance objectives and associated parameters by the Service Provider or Operator

MEF 23.1, 33

Class of Service Performance Objective

An objective for a given performance metric MEF 23.1

CLE Customer Located Equipment MEF 17CLI Command Line Interface MEF 15CM See - Color Mode MEF 6.1, 10.2, 14, 15, 19, 22.1,

23.1, 29, 33Color Forwarding An OVC attribute defining the relationship between the Color of an egress ENNI Frame and the Color

of the corresponding ingress ENNI Frame or Service FrameMEF 26.1, 34, 37

Color ID The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given external interface

MEF 22.1, 23.1

Color Identifier for EFO The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given ENNI that maps to an OVC End Point

MEF 23.1

Color Identifier for EFV The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given ENNI that maps to a VUNI End Point

MEF 23.1

Color Identifier for ENNI Frames (ENNI)

The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given ENNI that maps to an OVC End Point. A particular Color ID value may indicate Color instance of Green or Yellow for an ENNI Frame. PCP may indicate both Class of Service Name and Color. Information derivable from a) a set of one or more S-Tag PCP values or b) DEI value

MEF 33

Color Identifier for Service Frame The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given UNI

MEF 23.1

Color Identifier for Service Frame (UNI)

The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given UNI. A particular Color ID value may indicate Color instance of Green or Yellow for a Service Frame. PCP and DSCP may indicate both Class of Service Name and Color. Information derivable from a) a set of one or more C-Tag PCP values or b) a set of one or more DSCP values

MEF 33


P a g e | 6

Term + (Abbreviation) Description or expanded abbreviations Appears inColor Mode (CM) CM is a Bandwidth Profile parameter. The Color Mode parameter indicates whether the color-aware

or color-blind property is employed by the Bandwidth Profile. It takes a value of “color-blind” or “color-aware” only

MEF 6.1, 10.2, 14, 19, 23.1, 27, 29, 33

Color-aware A Bandwidth Profile property where a pre-determined level of Bandwidth Profile compliance for each Service Frame is taken into account when determining the level of compliance for each Service Frame

MEF 6.1, 7, 10.2, 14, 15, 19, 22.1, 23.1, 29, 33

Color-blind A Bandwidth Profile property where a pre-determined level of Bandwidth Profile compliance for each frame, if present, is ignored when determining the level of compliance by the CEN

MEF 6.1, 7, 10.2, 14, 15, 19, 23.1, 29, 33

Committed Burst Size (CBS) CBS is a Bandwidth Profile parameter. It limits the maximum number of bytes available for a burst of frames sent at the EI speed to remain CIR-conformant

MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33

Committed Information Rate (CIR)

CIR is a Bandwidth Profile parameter. It defines the average rate in bits/s of frames at an EI up to which the network delivers those frames, and is committed to meeting the performance objectives defined by the CoS Service Attribute

MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33

Connected Sub-Network (CSN) A Sub-Network that is connected by physical External Interfaces to the Ethernet Sub-Network under examination (see Figure 4)

MEF 29

Consecutive High Loss Interval (CHLI)

A sequence of small time intervals contained in T, each with a high frame loss ratio MEF 10.21, 26.1

Controller MEP The Controller MEP initiates SOAM PM PDUs, and in a single-ended session receives responses from the Responder MEP

MEF 35, 36

CoS See - Class of Service MEF 6.1, 7, 8, 10.2, 12.1, 15, 17, 20, 23.1, 25, 30, 31, 32, 33, 35, 36, 38, 39

CoS Frame Set Class of Service Frame Set: A set of frames that have a commitment from the Operator or Service Provider subject to a particular set of performance objectives

MEF 22.1, 34, 35

CoS FS See - Class of Service Frame Set MEF 23.1, 35CoS ID See - Class of Service Identifier MEF 12.1, 20, 22.1, 23.1, 35CoS ID for SOAM PM frames Class of Service Identifier for SOAM PM frames. The mechanism and/or values of the parameters in

the mechanism to be used to identify the Class of Service Name (H, M, L) that applies to a given SOAM frame

MEF 35

CoS Identifier for EFO The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to an OVC End Point

MEF 34

CoS Identifier for Service Frames The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given UNI

MEF 34


P a g e | 7

Term + (Abbreviation) Description or expanded abbreviations Appears inCoS Label A Class of Service Name. Each CoS Label identifies four Performance Tiers where each Performance

Tier contains a set of performance objectives and associated parametersMEF 22.1

CoS Name Class of Service Name: A designation given to one or more sets of performance objectives and associated parameters by the Service Provider or Operator

MEF 22.1, 34, 35

Coupling Flag (CF) The choice between two modes of operation of the bandwidth profile algorithm. It takes a value of 0 or 1 only

MEF 6.1, 10.2, 14, 15, 19, 23.1, 29, 33

CoV Coefficient of Variation MEF 35CPE Customer Premise Equipment MEF 17CPO CoS Performance Objective MEF 22.1, 23.1, 34CR Clock Recovery MEF 3CRC Cyclic Redundancy Check MEF 2, 3, 8CSN See - Connected Sub-Network MEF 29CSP Communication Service Provider MEF 22.1CSPF Constriant-based Shortest Path First MEF 2C-Tag Subscriber VLAN Tag MEF 23.1, 26.1, 31, 34, 37C-Tag frames IEEE 802.1ad Ethernet frames with one tag: C-Tag. The values of the C-VLAN IDs are in the range

between 1 and 4094MEF 37

CUET Customer Unit Edge Terminal MEF 3Current Problem List Identifies the current existing problems (probable cause), with severity for an entity MEF 15

Customer The organization purchasing and/or using Ethernet Services. Alternate term: Subscriber MEF 7, 15

Customer Edge Equipment on the Subscriber side of the UNI MEF 6.1, 7, 7, 9, 10.2, 11, 14, 15, 15, 19, 23.1, 27, 29, 33

Customer Edge VLAN CoS (CE-VLAN CoS)

The Priority Code Point bits in the IEEE 802.1Q Customer VLAN Tag in a Service Frame that is either tagged or priority tagged

MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33

Customer Edge VLAN ID (CE-VLAN ID)

The identifier derivable from the content of a Service Frame that allows the Service Frame to be associated with an EVC at the UNI

MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 27, 29, 33

Customer Edge VLAN Tag (CE-VLAN Tag)

0 MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 27, 29

C-VLAN Customer VLAN MEF 12.1DA Destination Address MEF 20Data Service Frame A Service Frame that is Unicast, Multicast, or Broadcast MEF 10.2DCE Data Circuit-terminating Equipment MEF 2DEI Drop Eligible Indicator MEF 12.1, 23.1, 31, 35DI Data Instance MEF 16, 24DM Delay Measurement MEF 35, 36


P a g e | 8

Term + (Abbreviation) Description or expanded abbreviations Appears inDMM Delay Measurement Message MEF 35DMR Delay Measurement Response MEF 35DNU Do not use MEF 22.1Double-tagged frames IEEE 802.1ad Ethernet frames with two tags. The outer tag is an S-Tag, the inner tag is a C-Tag MEF 37

Down MEP A MEP residing in a Bridge that receives SOAM PDUs from, and transmits them towards, the direction of the LAN. See also Up MEP

MEF 20, 25, 30

DSCP Differentiated Services Code Point MEF 22.1, 23.1, 26.1, 29, 37DSL Digital Subscriber Line MEF 2DSTM Derived System Timing Mode. The IWF system clock is derived from the incoming Ethernet frames MEF 3

DTE Data Terminal Equipment MEF 21DTM Derived Timing Mode. The recovered service clock is derived from the incoming Ethernet frames MEF 3

Dual Rate Bandwidth Profile A bandwidth profile that specifies both a CIR/CBS and EIR/EBS MEF 7, 15Dual-Ended A type of process where a MEP sends measurement information to a peer MEP that will perform the

calculationsMEF 35, 36

Duplicate Link Aggregation Group MEF 2DUT Device Under Test MEF 18E-Access Service Type Ethernet services that use an OVC with at least one UNI OVC End Point and one ENNI OVC End Point MEF 33

EAF ETH Adaptation Function MEF 12.1EBS See - Excess Burst Size MEF 6.1, 7, 8, 10.2, 11, 13, 14,

15, 19, 22.1, 23.1, 27, 29, 33E-BWP Egress Bandwidth Profile. A service attribute that specifies the length and arrival time characteristics

of egress Service Frames at the egress UNIMEF 22.1

EC ETH Connection MEF 12.1, 22.1ECDX Emulated Circuit De/Multiplexing Function MEF 3, 8ECF ETH Connection Function MEF 2, 12.1ECID Emulated Circuit Identifier MEF 3, 8ECS EC Segment MEF 12.1ECT Ethernet Connectionless Trail/Ethernet Connection-oriented Trail MEF 12.1EEAF Ethernet ECS Adaptation Function MEF 35EEC Ethernet Equipment Clock MEF 22.1EEIF Eth EC Interconnect Function MEF 35EEPP End-to-End Path Protection MEF 2EETF ETH EVC Termination Function MEF 12.1EFCF ETH Flow Conditioning Function MEF 12.1


P a g e | 9

Term + (Abbreviation) Description or expanded abbreviations Appears inEFD ETH Flow Domain MEF 12.1EFM Ethernet First Mile MEF 2EFO ENNI Frame that maps to OVC End Point MEF 23.1, 34EFT Eth Flow Termination MEF 3EFTF ETH Flow Termination Function MEF 8, 12.1EFV ENNI Frame that maps to a VUNI End Point MEF 23.1Egress Bandwidth Profile A service attribute that specifies the length and arrival time characteristics of egress Frames at the

egress EIMEF 6.1, 10.2, 23.1, 29, 33

Egress EI Frame An Ethernet Frame transmitted across the EI from the ESN toward the CSN MEF 29Egress Frame A Service Frame sent from the Service Provider network to the CE MEF 7, 11Egress Service Frame A Service Frame sent from the Service Provider network to the CE MEF 6.1, 9, 10.2, 14, 15, 19, 27,

29, 33EI See - External Interface MEF 12.1, 22.1, 23.1, 29, 32, 33,

35EI Frame An Ethernet frame transmitted across the EI toward the ESN or an Ethernet frame transmitted

across the EI toward the CSNMEF 29

EIR See - Excess Information Rate MEF 2, 6.1, 7, 8, 10.2, 11, 13, 14, 15, 19, 22.1, 23.1, 27, 29, 33

EIR-compliant Service frames that are compliant with the EIR of the bandwidth profile. EIR-compliant service frames may be colored green or yellow depending upon whether they are CIR-compliant or not, respectively

MEF 7, 15

E-LAN An Ethernet service type that is based on a Multipoint-to-Multipoint EVC MEF 2, 6.1, 9, 10.2, 14, 19, 20, 23.1, 27, 30, 33, 35

E-Line An Ethernet service type that is based on a Point-to-Point EVC MEF 2, 3, 6.1, 8, 9, 10.2, 14, 19, 20, 23.1, 27, 30, 33

E-LMI Ethernet Local Management Interface MEF 15, 17, 20, 24, 30EMS Element Management System MEF 17, 25, 30, 31, 35, 36, 38,

39eNB Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B is the Radio Base Station in

LTE. Also referred to as eNodeB or eNB. In this IA an eNodeB is one of the options for a RAN BSMEF 22.1

End Point Map A mapping of specified S-Tag VLAN ID values to specified OVC End Point Identifiers MEF 26.1, 37

End Point Map Bundling When multiple S-VLAN ID values map to a single OVC End Point in the End Point Map, and the OVC associating that OVC End Point is not a Rooted-Multipoint OVC

MEF 26.1

End Point Type A parameter in the End Point Map (In this specification the End Point Type is always OVC End Point.) MEF 26.1, 37


P a g e | 10

Term + (Abbreviation) Description or expanded abbreviations Appears inENNI External Network Network Interface MEF 12.1, 12.1, 15, 15, 17, 23.1,

26.1, 30, 31, 32, 33, 34, 35, 37, 38, 39

ENNI Frame The first bit of the Destination Address to the last bit of the Frame Check Sequence of the Ethernet Frame transmitted across the ENNI

MEF 23.1, 26.1, 33, 34, 37

ENNI MEG External Network-to-Network Interface Maintenance Entity Group MEF 30ENNI MTU MTU of an ENNI frame at the ENNI MEF 26.1, 33, 37ENNI-Ni The functional element administered by the Operator of the ith Operator MEN that supports the

protocols and procedures required in MEF 26.1MEF 12.1, 26.1, 30, 37

ENS See - Ethernet Network Section MEF 23.1EoS Ethernet over SONET MEF 2EoSONET Ethernet over SONET MEF 17EPCF ETH Provider Conditioning Function MEF 12.1, 35EPL Ethernet Private Line Service MEF 6.1, 8, 22.1, 23.1, 32, 33EP-LAN Ethernet Private LAN Service MEF 22.1, 32EP-Tree Ethernet Private Tree Service MEF 22.1, 32ES Errored Second MEF 3, 8ESC See - Ethernet Service Construct MEF 29ESCF ETH Subscriber Conditioning Function MEF 12.1, 17, 35ESD Ethernet Services Definition MEF 4ESF Extended Super Frame MEF 3, 8ESM Ethernet Services Model MEF 4ESMC Ethernet Synchronization Message Channel MEF 22.1ESMC Frame A Frame exchanged between a MEN and the RAN CE when UNI PHY is in synchronous operation

modeMEF 22.1

ESN See - Ethernet Sub-Network MEF 29ESNC See - Ethernet Sub-Network Connection MEF 29ESNC End Point A logical reference point located at a physical External Interface (EI) MEF 29ESR Errored Second Ratio MEF 3, 8ESRG ETH-layer SRG MEF 22.1ETF ETH Termination Function MEF 12.1ETH Ethernet Services Layer MEF 2, 4, 12.1, 17ETH FPP An Ethernet Flow Point Pool that represents an Ethernet UNI or E-NNI MEF 15ETH-AIS Ethernet Alarm Indication Signal function MEF 25, 30, 31, 38, 39ETH-CC Ethernet Continuity Check function MEF 30, 31, 38, 39ETH-DM Ethernet Delay Measurement function MEF 35, 36Ethernet Access Provider Operator of the MEN providing the OVC-based Ethernet service between a UNI and an ENNI MEF 33


P a g e | 11

Term + (Abbreviation) Description or expanded abbreviations Appears inEthernet Frame A data packet on a wire from preamble to FCS MEF 35Ethernet LAN Service Type An Ethernet Service Type distinguished by its use of a Multipoint-to-Multipoint EVC MEF 9, 10.2, 14, 19

Ethernet Line Service Type An Ethernet Service Type distinguished by its use of a Point-to-Point EVC MEF 9, 10.2, 14, 19Ethernet Network Section (ENS) A set of one or more MENs, each under a single or collaborative jurisdictional responsibility, for the

purpose of managing CPOsMEF 23.1

Ethernet Service Construct (ESC) An abstract entity used to facilitate describing the externally visible behavior of an Ethernet Sub-Network (ESN) as seen by looking into the physical demarcation points of this ESN. The four basic types of Ethernet Service Constructs introduced in this document are EIs, ESNCs, ESNC End Points, and TEs. Each of these entities represents a collection of defined attributes that are used to describe this behavior

MEF 29

Ethernet Sub-Network (ESN) The Sub-Network that is under examination by the Ethernet Service Constructs model (see Figure 4) MEF 29

Ethernet Sub-Network Connection (ESNC)

An association of two or more ESNC End Points that limits the exchange of EI frames to EIs in the ESNC

MEF 29

Ethernet Virtual Connection (EVC) An association of two or more UNIs that limits the exchange of Service Frames to UNIs in the Ethernet Virtual Connection

MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 29, 33

EtherType Ethernet Length/Type MEF 12.1ETH-LB Ethernet Loopback function MEF 30, 31, 38, 39ETH-LCK Ethernet Lock signal function MEF 31, 38, 39ETH-LM Ethernet Loss Measurement function MEF 35, 36ETH-LT Ethernet Linktrace function MEF 30, 31, 38, 39ETH-RDI Ethernet Remote Defect Indication function MEF 31, 38, 39ETH-SLM Ethernet Synthetic Loss Measurement Function MEF 35, 36ETH-Test Ethernet Test function MEF 31, 38, 39ETH-trail An ETH-trail is an “ETH-layer entity” responsible for the transfer of information from the input of a

trail termination source to the output of a trail termination sinkMEF 2

E-Tree An Ethernet service type that is based on a Rooted-Multipoint EVC MEF 6.1, 23.1, 27, 30, 33ETY Ethernet Physical Layer MEF 7, 15EVC See - Ethernet Virtual Connection MEF 2, 3, 4, 6.1, 7, 8, 9, 10.2, 11,

12.1, 13, 14, 15, 16, 17, 19, 20, 22.1, 23.1, 24, 25, 26.1, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39

EVC ID The Identifier for an EVC MEF 20EVC Maximum Transmission Unit Size

The maximum sized Service Frame allowed for an EVC MEF 10.2


P a g e | 12

Term + (Abbreviation) Description or expanded abbreviations Appears inEVC MEG Ethernet Virtual Connection Maintenance Entity Group MEF 30EVC MTU Size The maximum sized Service Frame allowed for an EVC MEF 6.1, 33EVC-MA Ethernet Virtual Connection Maintenance Association MEF 25EVPL Ethernet Virtual Private Line Service MEF 6.1, 8, 22.1, 23.1, 32, 33EVP-LAN Ethernet Virtual Private LAN Service MEF 22.1, 23.1, 32EVP-Tree Ethernet Virtual Private Tree Service MEF 22.1, 32E-WAN An MEF defined ETH services aware network that provides connectivity between two or more MENs

via ENNIsMEF 26.1

Excess Burst Size (EBS) EBS is a Bandwidth Profile parameter. It limits the maximum number of bytes available for a burst of Service or ENNI Frames sent at the EI speed to remain EIR-conformant

MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 29, 33

Excess Information Rate (EIR) EIR is a Bandwidth Profile parameter. It defines the average rate in bits/s of Service or ENNI Frames up to which the network may deliver Service or Network Frames but without any performance objectives

MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 29, 33

External Interface (EI) External Interface. These can be one of those defined in MEF 4, 12.1 MEF 23.1, 26.1, 29, 33, 34, 37FCS Frame Check Sequence MEF 8, 12.1, 35FD See - Frame Delay MEF 6.1, 10.2, 14, 15, 19, 22.1,

23.1, 30, 32, 33, 34, 35, 36

FDL Facility Data Link MEF 3, 8FDR See - Frame Delay Range MEF 22.1, 23.1, 33, 34, 35, 36FDV See - Frame Delay Variation MEF 6.1, 14, 17, 19, 22.1, 30, 32

FDX Full Duplex MEF 6.1, 7, 15FE Functional Element MEF 4FER Frame Error Ratio MEF 3, 8FLR See - Frame Loss Ratio MEF 6.1, 10.2, 14, 17, 19, 22.1,

23.1, 30, 32, 33, 34, 35, 36FM Fault Management MEF 22.1, 25, 30, 31, 36, 38, 39Forward OAM information sent from the Controller MEP to the Responder MEP. For LM it indicates the

frame counts/loss from the Controller MEP to the Responder MEP. For DM is indicates the delay and delay variation from the Controller MEP to the Responder MEP

MEF 35, 36

FP/FPP Flow Point/Flow Point Pool MEF 12.1Frame Short for Ethernet Frame MEF 6.1, 7, 9, 10.2, 11, 13, 14,

15, 19, 23.1, 29, 33Frame Delay (FD) The time required to transmit a frame from ingress EI to egress EI MEF 6.1, 10.2, 11, 14, 15, 19,

23.1, 33


P a g e | 13

Term + (Abbreviation) Description or expanded abbreviations Appears inFrame Delay Performance A characterization of the delays experienced by different frames belonging to the same CoS Frame

SetMEF 6.1, 10.2, 14, 15, 19, 23.1, 33

Frame Delay Range (FDR) The difference between the observed percentile of delay at a target percentile and the observed minimum delay for the set of frames in time interval T

MEF 10.2, 23.1, 33

Frame Delay Range Performance A measure of the extent of delay variability experienced by different frames belonging to the same CoS Frame Set

MEF 10.2, 23.1, 33

Frame Delay Variation (FDV) The difference in delay of two frames of the same CoS Frame Set MEF 6.1, 14, 15, 19Frame Delay Variation Performance

A characterization, based on Inter-Frame Delay Variation, of the variation in the delays experienced by different frames belonging to the same CoS Frame Set

MEF 6.1, 14, 15, 19

Frame Loss A performance attribute of an EVC MEF 11Frame Loss Ratio (FLR) Frame Loss Ratio is a characterization of the number of lost Frames between the ingress External

Interface (EI) and the egress External Interface (EI). Frame Loss Ratio is expressed as a percentageMEF 6.1, 10.2, 14, 15, 19, 23.1, 33

GARP Generic Attribute Registration Protocol MEF 2, 20GbE Gigabit Ethernet MEF 4GIWF Generic Inter-working Function MEF 22.1GRE Generic Routing Encapsulation MEF 2GSM Global System for Mobile communication MEF 22.1HDX Half Duplex MEF 7, 15H-FP Hairpin Flow Point MEF 12.1High Loss Interval (HLI) A small time interval contained in T with a high frame loss ratio MEF 10.21, 26.1HLI See - High Loss Interval MEF 10.21, 22.1, 26.1, 35, 36H-NID Hybrid NID MEF 12.1HNS Hybrid NID Service MEF 12.1HOVC Higher Order Virtual Container MEF 3IA Implementation Agreement MEF 3, 8, 20, 22.1, 23.1, 30, 35

I-BWP Ingress Bandwidth Profile. A characterization of ingress Service Frame arrival times and lengths at the ingress UNI and a specification of disposition of each Service Frame based on its level of compliance with the characterization

MEF 22.1

IE Information Element MEF 15IEEE Institute of Electrical and Electronics Engineers MEF 4, 8, 30, 31, 35, 36, 38, 39

IETF Internet Engineering Task Force MEF 2, 3, 8, 16, 30, 31, 36, 38, 39

IFDV See - Inter-Frame Delay Variation MEF 10.2, 22.1, 23.1, 33, 34, 35, 36

IGP Interior Gateway Protocol MEF 2II Internal Interface MEF 12.1


P a g e | 14

Term + (Abbreviation) Description or expanded abbreviations Appears inIngress The direction from the CE into the Service Provider network MEF 13Ingress Bandwidth Profile A characterization of frame arrival times and lengths at the ingress EI and a specification of

disposition of each frame based on its level of compliance with the characterizationMEF 6.1, 10.2, 23.1, 29, 33

Ingress Frame A frame transmitted across the EI toward the CEN MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 29, 29, 33

I-NNI Internal NNI MEF 17Inter-Frame Delay Variation (IFDV)

The difference in delay of two frames of the same CoS Frame Set MEF 10.2, 23.1, 33

Inter-Frame Delay Variation Performance

A characterization, based on Inter-Frame Delay Variation, of the variation in the delays experienced by different frames belonging to the same CoS Frame Set

MEF 10.2, 23.1, 33

IP Internet Protocol. IPv4 is for version 4 (RFC 791) and IPv6 is for version 6 (RFC 2460) MEF 22.1

IPSec Internet Protocol Security MEF 22.1ITU International Telecommunication Union MEF 2, 4, 16ITU-T ITU Telecommunication Standardization Sector MEF 3, 8, 30, 31, 35, 36, 38, 39IWF Interworking Function MEF 3, 4, 8L1 Layer One MEF 4L2 Layer Two MEF 4L2+ Layer(s) above L2 MEF 4L2CP Layer 2 Control Protocol MEF 12.1, 20, 22.1, 23.1, 29L2CP Frame See - Layer 2 Control Protocol Service Frame MEF 33L2CP Tunneling The process by which a frame containing a Layer 2 Control Protocol is transferred between External

InterfacesMEF 26.1

L2DP Layer Two Data Plane MEF 12.1LACP Link Aggregation Control Protocol MEF 2, 20LAG Link Aggregation Group MEF 2, 20, 29LAN Local Area Network MEF 2, 4, 12.1, 30, 31, 35, 36,

38, 39LANE ATM LAN Emulation MEF 17Layer 2 Control Protocol Service Frame (L2CP Frame)

A frame that is used for Layer 2 control, e.g., Spanning Tree Protocol MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33

Layer 2 Control Protocol Tunneling

The process by which a frame carrying a Layer 2 Control Protocol Service data unit is passed through the Service Provider or Operator network without being processed and is delivered to the proper EI(s)

MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 29, 33

LB Loop Back MEF 20LBM Loopback Message MEF 20, 25, 30, 31, 38, 39LBR Loopback Reply MEF 20, 25, 30, 31, 38, 39


P a g e | 15

Term + (Abbreviation) Description or expanded abbreviations Appears inLCK Locked, used in reference to LCK PDUs MEF 31, 38, 39Leaf OVC End Point An OVC End Point that has the role of Leaf MEF 26.1Link An ETH link or TRAN link MEF 2Link OAM OAM specific to a single link as per clause 57 of [IEEE 802.3] MEF 20Link Protection Mechanism (LPM) Any mechanism (e.g. LAG) used to protect traffic in the event of link failure across an EI with

multiple linksMEF 29

LLC Logical Link Control MEF 12.1LM Loss Measurement MEF 35, 36LMM Loss Measurement Message MEF 35LMR Loss Measurement Reply MEF 35LOF Loss of Frame MEF 2LOFA Loss of Frame Alignment MEF 8LOFS Loss of Frames State MEF 8LOH Line OverHead MEF 3LOPS Loss Of Packet Synchronization MEF 3LOS Loss of Signal MEF 2, 3, 8LOVC Lower Order Virtual Container MEF 3LPM See - Link Protection Mechanism MEF 29LSP Label Switched Path MEF 2LSR Label Switched Router MEF 2LTE Long Term Evolution MEF 22.1LTE. Line Termination Equipment MEF 3LTM Linktrace Message MEF 30, 31, 38, 39LTR Linktrace Reply MEF 30, 31, 38, 39MA Maintenance Association (equivalent to a MEG) MEF 25, 30, 31, 35, 36, 38, 39MAC Media Access Control MEF 2, 4, 8, 12.1, 16, 17, 24, 25,

30, 31, 35, 36, 38, 39MAID Maintenance Association Identifier (equivalent to a MEG ID) MEF 25, 30, 31, 35, 38, 39Maintenance Interval A Maintenance Interval is a time interval agreed to by the Service Provider and Subscriber during

which the service may not perform well or at allMEF 35

Mapper A device or logic that implements a mapping function MEF 3Mapping The process of associating each bit transmitted by the service into the SDH/SONET payload structure

that carries the service. For example, mapping a DS1 service into SONET VT-1.5 / SDH VC-11 associate each bit of the DS1 with a location in the VT-1.5/VC-11

MEF 3


P a g e | 16

Term + (Abbreviation) Description or expanded abbreviations Appears inMaximum Number of CE-VLAN IDs per OVC

An integer that indicates the quantity of CE-VLANs that can be mapped to a single OVC at that UNI. A value = 1 indicates that UNI can only map single CE-VLANs to an OVC. A value > 1 indicates that up to that limit can be mapped to a single OVC

MEF 33

Maximum Number of EVCs The maximum number of EVCs that may be on a UNI MEF 6.1Maximum Number of OVCs per UNI

The maximum number of OVCs that may be on a UNI MEF 33

Maximum number of UNIs (MNU) The maximum number of UNIs that may be in an EVC MEF 6.1, 10.2Maximum Transmission Unit (MTU)

The maximum sized Service Frame allowed for an Ethernet service MEF 33

MBSFN Multimedia Broadcast Multicast Service (MBMS) Single Frequency Network support MEF 22.1

MCF MAC Convergence Function MEF 12.1MD Maintenance Domain MEF 20, 25, 30, 31, 35, 36, 38,

39MD Level Maintenance Domain Level (equivalent to a MEG level) MEF 25, 31, 35, 36, 38, 39ME Maintenance Entity. A point-to-point relationship between two MEPs within a single MEG MEF 17, 20, 25, 30, 31, 35, 36,

38, 39Mean Frame Delay Performance The arithmetic mean, or average of delays experienced by frames belonging to the same CoS Frame

SetMEF 10.2, 23.1, 33

Mean time to restore The mean time from when a service is unavailable to the time it becomes available again MEF 2

Measurement Bin A Measurement Bin is a counter that stores the number of delay measurements falling within a specified range, during a Measurement Interval

MEF 35, 36

Measurement Interval A period of time during which measurements are taken. Measurements initiated during one Measurement Interval are kept separate from measurements taken during other Measurement Intervals. It is important to note that this is different from T

MEF 35, 36

Measurement Interval Data Set The collection of completed measurements that were initiated during a Measurement Interval MEF 35

MEF Metro Ethernet Forum MEF 2, 4, 16, 30, 31, 35, 36, 38, 39

MEG Maintenance Entity Group (equivalent to a MA) MEF 12.1, 17, 20, 22.1, 25, 30, 31, 35, 36, 38, 39

MEG ID Maintenance Entity Group Identifier. Equivalent to Maintenance Association Identifier (MAID) MEF 30, 31, 38, 39

MEG Level Maintenance Entity Group Level (equivalent to MD Level) MEF 20, 30, 31, 35, 36, 38, 39MEL Maintenance Entity Level MEF 12.1


P a g e | 17

Term + (Abbreviation) Description or expanded abbreviations Appears inMEN Metro Ethernet Network. Synonymous with CEN (Carrier Ethernet Network) MEF 2, 3, 4, 6.1, 7, 8, 9, 12.1, 15,

16, 17, 23.1, 26.1, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39

MEN-bound IWF The IWF receiving TDM data from the customer’s TDM-based equipment, and forwarding this data in the form of Ethernet frames into the MEN

MEF 8

ME-NE See - Metro Ethernet Network Element MEF 15MEP Maintenance Association End Point (IEEE) or MEG End Point (ITU) MEF 17, 20, 22.1, 25, 30, 31, 35,

36, 38, 39MEP ID Maintenance Entity End Point Identification MEF 20Metro Ethernet Network The Operator’s or Service Provider’s network providing Ethernet services. Synonymous with Carrier

Ethernet Network (CEN)MEF 6.1, 7, 15, 23.1, 33

Metro Ethernet Network Element (ME-NE)

The Operator’s or Service Provider’s network providing Ethernet services. Synonymous with Carrier Ethernet Network (CEN)

MEF 15

MFD Mean Frame Delay MEF 22.1, 23.1, 33, 34, 35, 36MGT EC Management EC MEF 12.1MHF MIP Half Function MEF 30, 38MIB Management Information Base MEF 3, 8, 31, 36, 38, 39Minimum Inter-Frame Gap Defined as 96 Bit Times [section 4.4.2 in IEEE Std 802.3-2005] MEF 37MIP Maintenance domain Intermediate Point(IEEE) or MEG Intermediate Point (ITU) MEF 17, 20, 30, 31, 35, 36, 38,

39MME Mobility Management Entity is an LTE function and located in the Network Controller site. In this IA

MME is included when referring to a RAN NCMEF 22.1

MNU See - Maximum Number of UNIs MEF 6.1, 10.2Mobile Operator The entity obtaining the Backhaul service from a SP or MEN Operator. Also referred to as Subscriber

in this IAMEF 22.1

MP Maintenance Point. One of either a MEP or a MIP MEF 25, 30, 35, 36, 38, 39MPLS Multi Protocol Label Switching MEF 2, 4, 17MRTIE Maximum Relative Time Interval Error MEF 18MTP Multipoint MEF 12.1MTU See - Maximum Transmission Unit MEF 6.1, 20, 22.1, 25, 26.1, 30,

31, 33, 34, 35, 37, 38, 39MTU size The maximum sized Service Frame allowed for an Ethernet service MEF 6.1Multicast Service Frame A Service Frame that has a multicast destination MAC address MEF 6.1, 7, 9, 10.2, 11, 13, 14,

15, 19, 33Multiplex Transmit one or more channels over a single channel MEF 3Multipoint-to-Multipoint EVC An EVC with two or more UNIs MEF 6.1, 7, 9, 10.2, 11, 13, 14,

15, 19, 23.1, 29, 33Multipoint-to-Multipoint OVC An OVC that can associate two or more Root OVC End Points MEF 26.1


P a g e | 18

Term + (Abbreviation) Description or expanded abbreviations Appears inN/A Not Applicable MEF 6.1, 23.1, 33N/S Not Specified MEF 6.1, 7, 15, 22.1, 23.1, 33NDD Network Demarcation Device MEF 17NE Network Element MEF 2, 3, 4, 12.1, 17, 20, 22.1,

25, 30, 31, 32, 35, 36, 38, 39NETCONF The Network Configuration Protocol MEF 38, 39NETCONF Client A NETCONF entity that nvokes protocol operations on a NETCONF server. In addition, a client can

subscribe to receive notifications from a serverMEF 38, 39

NETCONF Server A NETCONF entity that executes protocol operations invoked by a NETCONF client. In addition, a server can send notifications to a client

MEF 38, 39

NG Smallest compliant value of WG for a given bandwidth profile MEF 37, 37NI- Network Interworking (e.g., NI-NNI) MEF 4NID Network Interface Device MEF 12.1NI-NNI Network Interworking NNI MEF 17NMI NID-MEN Interface MEF 12.1NMI-C NMI - Client (Functional Element) MEF 12.1NMI-N NMI - Network (Functional Element) MEF 12.1NMS Network Management System MEF 17, 25, 30, 31, 35, 36, 38,

39NNI Network Network Interface MEF 3, 4, 12.1, 17, 30, 31, 38, 39

Node A Provider owned network element MEF 2, 4, 12.1, 17, 30, 31, 38, 39

NodeB WCDMA Radio Base Station. In this IA a NodeB is one of the options for a RAN BS MEF 22.1NSP Network Service Provider MEF 22.1NT Network Termination MEF 4NTP Network Time Protocol MEF 22.1NUNI NID UNI MEF 12.1NY Smallest compliant value of WY for a given bandwidth profile MEF 37OAM Operations, Administration and Maintenance MEF 2, 16, 17, 20, 21, 22.1, 24,

25, 30, 31, 35, 36, 38, 39OAM Domain The part of a network for which faults in connectivity can be managed and performance can be

monitored. (equivalent to a "Maintenance Domain")MEF 25, 30, 35

OAM Flow Space The portions of an end-to-end flow where SOAM frames are seen as SOAM frames (as opposed to being seen as data frames when double tagged)

MEF 30, 30, 35

OAMPDU Operation Administration and maintenance protocol data unit MEF 21O-EC Operator EC MEF 12.1


P a g e | 19

Term + (Abbreviation) Description or expanded abbreviations Appears inOn-Demand OAM actions that are initiated via manual intervention for a limited time to carry out diagnostics.

On-Demand OAM can result in singular or periodic OAM actions during the diagnostic time intervalMEF 35, 36

One-way A measurement performed in the forward or backward direction. For example from MEP A to MEP B or from MEP B to MEP A

MEF 35, 36

Operator The administrative organization responsible for a CEN MEF 23.1, 26.1, 29, 34, 37Operator MEG Operator Maintenance Entity Group MEF 30Operator Virtual Connection (OVC)

An association of OVC End Points MEF 23.1, 26.1, 33, 34, 37

Operator-MA Operator Maintenance Association MEF 25Ordered Pair of UNIs A directional UNI pair of the form <Ingress UNI, Egress UNI>, selected from the UNI list for the EVC

of interestMEF 10.2

OSS Operations Support System MEF 31, 36, 38, 39OTN Optical Transport Network MEF 4OVC See - Operator Virtual Connection MEF 23.1, 26.1, 30, 32, 33, 34,

35, 37, 38, 39OVC End Point (OVC EP) An association of an OVC with a specific External Interface i.e., UNI, ENNI MEF 23.1, 26.1, 33, 34, 37OVC End Point Map at the UNI An association of CE-VLAN IDs with OVCs at a UNI MEF 33OVC End Point Role A property of an OVC End Point that determines the forwarding behavior between it and other OVC

End Points that are associated with the OVC End Point by an OVCMEF 26.1, 26.1, 30, 32, 33, 34, 35, 37, 38, 39

OVC EP See - OVC End Point MEF 23.1, 34OVC Identifier string that is unique among all OVCs in the Operator MEN MEF 26.1, 33, 34, 37P2P Point-to-point MEF 12.1, 25, 30, 35Path A succession of interconnected links at a specific (ETH or TRANS) layer MEF 2, 34PCEF Policy and Charging Enforcement Function MEF 22.1, 33, 34, 37PCP Priority Code Point MEF 22.1, 23.1, 30, 35Pd Frame Delay Performance percentile MEF 23.1PDH Plesiochronous Digital Hierarchy. PDH refers to the DS1/DS2/DS3 and E1/E3/E4 family of signals MEF 3, 4, 8, 22.1

PDU Protocol Data Unit MEF 8, 12.1, 20, 25, 30, 31, 35, 36, 38, 39

PE Provider Edge MEF 2, 3, 4, 12.1PEC Packet based Equipment Clocks MEF 22.1, 4, 8, 22.1Performance Tier (PT) A MEF CoS Performance Objectives (CPO) set MEF 23.1, 12.1, 20, 25, 30, 31,

35, 36, 38, 39PICS Protocol implementation conformance statement MEF 21, 3, 4, 12.1PLL Phase Locked Loop MEF 3


P a g e | 20

Term + (Abbreviation) Description or expanded abbreviations Appears inPM Performance Monitoring MEF 22.1, 35, 36PM Function A MEP capability specified for performance monitoring purposes (e.g., Single-Ended Delay, Single-

Ended Synthetic Loss)MEF 35, 36

PM Session A PM Session is the application of a given PM Function between a given pair of MEPs and using a given CoS Frame Set over some (possibly indefinite) period of time

MEF 35, 36

PM Solution A PM Solution is a set of related requirements that when implemented allow a given set of performance metrics to be measured using a given set of PM functions

MEF 35, 36

PM Tool A generic term used to discuss the application of a PM Function MEF 35, 36Pointer A part of the SDH/SONET overhead that locates a floating payload structure. Frequency differences

between SDH/SONET network elements or between the payload and the SDH/SONET equipment can be accommodated by adjusting the pointer value

MEF 3, 36

Point-to-Point EVC An EVC with exactly 2 UNIs MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33

Point-to-Point OVC An OVC that associates exactly two Root OVC End Points MEF 26.1, 36Pr A specific percentile of the Frame Delay Performance used in Frame Delay Range , where Pv>0 MEF 23.1

PRBS Pseudo-Random Binary Sequence MEF 18, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33

PRC Primary Reference Clock MEF 22.1PRM Protection Reference Model MEF 2Proactive OAM actions that are carried on continuously to permit timely reporting of fault and/or

performance statusMEF 35, 36

Protection merge point A point in which the protection path traffic is either merged back onto the working path or passed on to the higher layer protocols (used in [3], called ‘tail-end switch’ in SONET/SDH)

MEF 2

PRS Primary Reference Source MEF 3PSTN Public Switched Telephone Network MEF 3PT See - Performance Tier MEF 22.1, 23.1, 34, 35PT Polling Timer MEF 24PTP Precision Time Protocol MEF 22.1Pv Inter-Frame Delay Variation Performance percentile MEF 23.1PVT Polling Verification Timer MEF 24PW Pseudo Wire MEF 17PWE3 Pseudo-Wire Emulation Edge to Edge (an IETF working group) MEF 3, 8QL Quality Level of clock used in Synchronous Ethernet MEF 22.1


P a g e | 21

Term + (Abbreviation) Description or expanded abbreviations Appears inQoS Quality of Service MEF 2Qualified Set of Service Frames The set of frames that comply with specific criteria, such as the arrival time at the Ingress UNI and

Bandwidth Profile compliance, on which a performance attribute is basedMEF 10.2

RAN Radio Access Network MEF 22.1RAN BS RAN Base Station MEF 22.1RAN CE RAN Customer Edge MEF 22.1RAN NC RAN Network Controller MEF 22.1RBS Radio Base Station defined in this IA and referred generally as Base Station in 3GPP TS 21.905 MEF 22.1

RDI Remote Defect Indication MEF 3, 8, 20, 25, 30, 31, 38, 39

Remote UNI (RUNI) Remote UNI is a UNI serving as the UTA component consisting of a collection of service attributes in the UNI within an Operator’s MEN. The remote UNI is paired with a VUNI in a VUNI Provider’s MEN. At the remote UNI, Service Frames are exchanged between the Subscriber and the Network Operator MEN

MEF 28

Resiliency Performance The number of High Loss Intervals and Consecutive High Loss Intervals in a time interval T MEF 10.21, 26.1, 36

Responder MEP In a single-ended session, the Responder MEP receives SOAM PM PDUs, from the Controller MEP, and transmits a response to the Controller MEP

MEF 35, 36

RFC Request For Comment MEF 30, 31, 35, 36, 38, 39RMI Remote Management Interface MEF 12.1RMP Rooted Multipoint MEF 12.1RNC Radio Network Controller MEF 22.1Root OVC End Point An OVC End Point that has the role of Root MEF 26.1Rooted-Multipoint MEF Point to Multipoint service; see [MEF 10.1] MEF 20Rooted-Multipoint EVC A multipoint EVC in which each UNI is designated as either a Root or a Leaf. Ingress Service Frames

at a Root UNI can be delivered to one or more of any of the other UNIs in the EVC. Ingress Service Frames at a Leaf UNI can only be delivered to one or more Root UNIs in the EVC

MEF 6.1, 10.2, 23.1, 33

Rooted-Multipoint OVC An OVC that can associate at least one Leaf or Trunk OVC End Point MEF 26.1RPC Remote Procedure Call MEF 38, 39RPR Resilient Packet Ring MEF 2, 4RSTP Rapid Spanning Tree Protocol MEF 2RTP Real-time Transport Protocol MEF 8, 22.1RUNI See - Remote UNI MEF 30RUNI-N Remote UNI-N (Functional Element) MEF 12.1


P a g e | 22

Term + (Abbreviation) Description or expanded abbreviations Appears inS When applied to an EVC it is a non-empty subset of ordered UNI pairs and when applied to an OVC

it’s a non-empty subset of ordered OVC End Point pairsMEF 23.1, 35

Scheduled Downtime A time interval agreed upon by both the Subscriber and Service Provider during which a service may be disabled by the Service Provider

MEF 10.2

SDH Synchronous Digital Hierarchy MEF 2, 3, 4SDO Standards Development Organization MEF 32S-EC Subscriber EC MEF 12.1Segment A connected subset of the trail MEF 2SEP Service End Point MEF 32Service Frame An Ethernet frame transmitted across the UNI toward the Service Provider or an Ethernet frame

transmitted across the UNI toward the SubscriberMEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 21, 23.1, 26.1, 29, 31, 33, 34, 35, 36, 37, 38, 39

Service Frame Delivery An EVC service attribute defined in [2] MEF 6.1Service Level Agreement (SLA) The contract between the Subscriber and Service Provider specifying the agreed to service level

commitments and related business agreementsMEF 6.1, 7, 10.2, 14, 15, 19, 23.1, 33

Service Level Specification (SLS) The technical specification of service level (including performance) MEF 6.1, 7, 10.2, 14, 15, 19, 23.1, 33

Service Multiplexing A UNI service attribute in which the UNI can be in more than one EVC instance MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 29, 33

Service OAM Service OAM is OAM used to monitor an individual Service; see [ITU-T Y.1731] and [IEEE 802.1ag] MEF 20

Service Provider (SP) The organization providing UNI to UNI Ethernet service(s) MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 26.1, 29, 33, 34, 37

SES Severely Errored Second MEF 3SESR Severely Errored Second Ratio MEF 3SF Super Frame MEF 3, 8S-GW Serving Gateway is an LTE function and located at the Network Controller site. In this IA S-GW is one

of the options for RAN NCMEF 22.1

SI- Service Interworking (e.g., SI-NNI) MEF 4Single Rate Service A service that only specifies a CIR/CBS and no EIR/EBS MEF 7Single-Ended A type of process where a MEP sends a measurement request and the peer MEP replies with the

requested information so the originating MEP can calculate the measurementMEF 35, 36

Sink MEP In a dual-ended session, the Sink MEP receives SOAM PM PDUs, from the Controller MEP and performs the performance calculations

MEF 35, 36

SI-NNI Service Interworking NNI MEF 17


P a g e | 23

Term + (Abbreviation) Description or expanded abbreviations Appears inSLA See - Service Level Agreement MEF 2, 3, 6.1, 7, 10.2, 14, 15, 17,

19, 22.1, 23.1, 33SLM Synthetic Loss Message MEF 35, 36SLR Synthetic Loss Reply MEF 35SLS See - Service Level Specification MEF 2, 3, 6.1, 7, 10.2, 12.1, 14,

15, 17, 19, 22.1, 23.1, 32, 33, 35

SNI Service Node Interface MEF 4, 15, 17, 29S-NID Service NID MEF 12.1SNMP Simple Network Management Protocol MEF 31, 36, 38, 39SNMP Agent An SNMP entity containing one or more command responder and/or notification originator

applications (along with their associated SNMP engine). Typically implemented in an NEMEF 36, 38, 39

SNMP Manager An SNMP entity containing one or more command generator and/or notification receiver applications (along with their associated SNMP engine). Typically implemented in an EMS or NMS

MEF 31, 36, 38, 39

SOAM Service Operations, Administration, and Maintenance MEF 22.1, 25, 30, 31, 35, 36, 38, 39

SOAM PDU Service OAM Protocol Data Unit. Specifically, those PDUs defined in [IEEE 802.1ag], [ITU-T Y.1731], or MEF specifications

MEF 30, 31, 35, 36, 38, 39

SOAM PM CoS ID See CoS ID for SOAM PM frames MEF 35SOAM PM Implementation Capabilities of an NE that are required to support SOAM Performance Monitoring. Specifically, those

PDUs defined in IEEE 802.1Q-2011 [24], ITU-T Y.1731 [1], or MEF specifications. In ITU-T documents the equivalent term OAM PDU is used

MEF 35

SOAM PM PDU Service OAM Protocol Data Unit specifically for Performance Measurement. Examples are LMM/LMR, DMM/DMR/1DM, SLM/SLR

MEF 35

SONET Synchronous Optical Network MEF 2, 3, 4SP See - Service Provider MEF 22.1, 30, 32SP-EC Ethernet Connection across the SP MEF 12.1, 22.1SRG Shared Risk Group. Set of NEs that are collectively impacted by a specific fault or fault type MEF 22.1

SRLG Shared Risk Link Group MEF 2SSM Synchronization Status Message MEF 3, 22.1SSRC Synchronization Source (a field within the RTP protocol, RFC 3550) MEF 8S-Tag Service Provider VLAN Tag MEF 23.1, 26.1, 31, 33, 34, 37S-Tag frames IEEE 802.1ad Ethernet frames with one tag: S-Tag. The values of the S-VLAN IDs are in the range

between 1 and 4094MEF 37


P a g e | 24

Term + (Abbreviation) Description or expanded abbreviations Appears inSTP Spanning Tree Protocol MEF 2Structure-agnostic Structure-agnostic emulation is the transport of unstructured TDM, or of structured TDM when the

structure is completely disregarded by the transport mechanismMEF 8

Structure-aware Structure-aware emulation is the transport of structured TDM taking at least some level of the structure into account

MEF 8

Structure-indicated Encapsulation utilized for Structure-Aware TDM transport where TDM structure boundaries are indicated by pointers

MEF 8

Structure-locked Encapsulation utilized for Structure-Aware TDM transport where TDM structure boundaries are indicated by packet payload boundaries

MEF 8

Subscriber The organization purchasing and/or using Ethernet Services. This may be an end user business organization or a mobile operator

MEF 2, 6.1, 7, 9, 10.2, 11, 13, 14, 15, 16, 19, 22.1, 23.1, 26.1, 29, 33, 34, 37

Subscriber MEG Subscriber Maintenance Entity Group MEF 30Subscriber-MA Subscriber Maintenance Association MEF 25Subscriber-MEG The MEG at Subscriber Level MEF 20S-VLAN Service VLAN (also referred to as Provider VLAN) MEF 12.1S-VLAN ID The 12 bit VLAN ID field in the S-Tag of an ENNI Frame MEF 26.1, 33, 34, 37Synthetic Frame An Ethernet frame created to emulate service traffic, carry additional information necessary to

support calculating delay or loss and that is treated the same way as a Service FrameMEF 35

Synthetic Traffic SOAM traffic that emulates service traffic in order to measure the performance experience. Delay measurements must use synthetic traffic, because user traffic does not contain standardized timestamp fields. Other measurements, such as Frame Loss, may also use synthetic frames for certain advantages (e.g., ability to measure loss in multipoint services)

MEF 35, 36, 39

T Time Interval for SLS Metrics. The time over which a Performance Metric is defined. T => Measurement Interval, and generally consists of multiple Measurement Intervals

MEF 10.21, 23.1, 35, 36

TAF Transport Adaptation Function MEF 12.1Tag An optional field in a frame header. In this document it is the 4-byte field that, when present,

appears immediately after the Source Address, or another tag in an Ethernet frame header and which consists of the 2-byte Tag Protocol Identification Field (TPID) which indicates S-Tag or C-Tag, and the 2-byte Tag Control Information field (TCI) which contains the 3-bit Priority Code Point, and the 12-bit VLAN ID field

MEF 26.1, 33, 37

TALS TDM Access Line Service MEF 3, 8TAP Tunnel Attachment Process MEF 12.1


P a g e | 25

Term + (Abbreviation) Description or expanded abbreviations Appears inTAP-N TAP – Network (Functional Element) MEF 12.1TC Textual Conventions MEF 31, 36, 38, 39TCF Transport Connection Function MEF 2TCP Transmission Control Protocol MEF 2TDM Time Division Multiplexing (examples include Nx64 kbit/s, T1, E3, OC-3, STM-1, OC-12) MEF 2, 3, 8

TDM-bound The direction of travel of CESoETH frames within the IWF receiving frames containing emulated circuit data from the MEN, and forwarding TDM data to the customer’s TDM-based equipment

MEF 8

TE See - Tunnel End Point MEF 29TE Transport Equipment MEF 4Test MEG Test Maintenance Entity Group MEF 30Tester Special equipment used to generate and monitor traffic for verification purposes MEF 9

Test-MA Test Maintenance Association MEF 25Test-MEG The MEG used by Service provider to test the connectivity to UNI-C MEF 20TF Termination Function MEF 12.1TFP Termination Flow Point MEF 12.1T-FP Trunk Flow Point MEF 12.1TL-FP Trunk Leaf Flow Point MEF 12.1T-Line TDM Line Service MEF 3, 8TLV Type, Length and Value MEF 16, 20, 21, 22.1, 24, 31, 36,

38, 39T-NID Transport NID MEF 12.1ToD Time-of-day MEF 35Traffic Conditioning A process that classifies the traffic units according to configured rules and ensures traffic is

conformant before forwarding the trafficMEF 35

TRAN Transport Layer MEF 2, 4, 12.1, 17Transport A specific TRANS layer technology MEF 2TRAN-trail A TRAN-trail (see ITU-T Recommendation G.805) is a “transport entity” responsible for the transfer

of information from the input of a trail termination source to the output of a trail termination sinkMEF 2

TrCP Traffic Conditioning Point MEF 17Trunk OVC End Point An OVC End Point that has the role of Trunk MEF 26.1TSP TDM Service Processing MEF 3, 8TST Test PDU MEF 31, 38, 39TTF Trail Termination Function MEF 2


P a g e | 26

Term + (Abbreviation) Description or expanded abbreviations Appears inTunnel End Point (TE) An ESC that represents a collection of ESNC End Points at an EI. It is used to facilitate the description

of the externally observable behavior of the case where multiple ESNCs are encapsulated into a single service stream within an ESN

MEF 29

Two-way A measurement of the performance of frames that flow from the Controller MEP to the Responder MEP and back again

MEF 35, 36

UML Unified Modeling Language MEF 31, 36, 38, 39UNI User Network Interface. The physical demarcation point between the responsibility of the Service

Provider and the responsibility of the SubscriberMEF 2, 3, 4, 6.1, 7, 8, 9, 10.2, 11, 12.1, 13, 14, 15, 16, 17, 19, 20, 21, 22.1, 23.1, 24, 25, 26.1, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39

UNI ID The Identifier for a UNI MEF 20UNI Maximum Transmission Unit Size

The maximum sized Service Frame allowed at the UNI MEF 10.2

UNI MEG User-to-Network Interface Maintenance Entity Group MEF 30UNI MTU Size The maximum sized Service Frame allowed at the UNI MEF 6.1, 33UNI-C The UNI-C is a compound architectural component of a CEN that represents all of the functions

required to connect a subscriber to a CENMEF 2, 12.1, 15, 16, 19, 20, 21, 22.1, 24, 25, 27, 30

Unicast Service Frame A Service Frame that has a unicast destination MAC address MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 29, 33

UNI-EVC The part of the EVC between the UNI-N and UNI-C MEF 11UNI-EVCID The ID that identifies the part of the EVC between the UNI-N and UNI-C. This can be derived from

CE-VLAN ID, Physical Port, TRANS Tag or combination of theseMEF 11

UNI-MA User-to-Network Interface Maintenance Association MEF 25UNI-MEG UNI Maintenance Entity Group MEF 20UNI-N The UNI-N is a compound architectural component of a CEN that represents all of the functions

required to connect a CEN to a CEN subscriberMEF 2, 12.1, 15, 16, 19, 20, 21, 22.1, 24, 25, 27, 30

Unscheduled Downtime A time interval not agreed upon by both the Subscriber and Service Provider during which the Service Provider determines that the service is not usable

MEF 10.2

Up MEP A MEP residing in a Bridge that transmits SOAM PDUs towards, and receives them from, the direction of the Bridge Relay Entity. See also Down MEP

MEF 20, 25, 30

UP/PCP User Priority/Priority Code Point MEF 12.1User Network Interface The physical demarcation point between the responsibility of the Service Provider and the

responsibility of the SubscriberMEF 2, 6.1, 7, 9, 10.2, 11, 14, 15, 19, 21, 23.1, 29, 33

UTA The UNI Tunnel Access associates a VUNI and remote UNI and is composed of VUNI and remote UNI Components and at least one supporting OVC

MEF 12.1, 28

UTA Component A specific set of capabilities which may be used as part of UTA MEF 28MEF Terminology Ad-hoc Agreed Terms for Review

P a g e | 27

Term + (Abbreviation) Description or expanded abbreviations Appears inUTA OVC An OVC in the Network Operator’s MEN that provides an association of a remote UNI with an ENNI

in support of UTAMEF 28

UTC Coordinated Universal Time MEF 31, 35, 36, 39VC Virtual Container MEF 3VID VLAN Identifier MEF 25, 30, 31, 35, 38, 39VLAN Virtual Local Area Network MEF 4, 6.1, 7, 8, 12.1, 15, 22.1,

23.1, 25, 30, 31, 32, 33, 35, 36, 38, 39

VLAN ID VLAN Identifier MEF 12.1VPLS Virtual Private LAN Service MEF 12.1, 17, 17VPWS Virtual Private Wire Service MEF 17VT Virtual Tributary MEF 3VUNI Virtual UNI (VUNI) is the component consisting of a collection of service attributes in the VUNI

Provider’s MEN. The VUNI is paired with a remote UNI in a Network Operator’s MENMEF 12.1, 28, 30

VUNI End Point An End Point at the VUNI Provider’s side of a specific ENNI that associates the ENNI with a VUNI in support of UTA

MEF 28

VUNI Provider The Operator MEN providing the VUNI MEF 28VUNI-N VUNI – Network (Functional Element) MEF 12.1WAN Wide Area Network MEF 4, 12.1WCDMA Wideband Code Division Multiple Access MEF 22.1WEN Wide Area Ethernet Network MEF 12.1WiMAX Worldwide Interoperability for Microwave Access MEF 22.1WTR Wait to Restore MEF 2xSTP Spanning Tree Protocol (multiple variations) MEF 17YANG A Data Modeling Language for NETCONF MEF 38, 39Δt A time interval much smaller than T MEF 23.1

Notes two terms PT and TE are used in 2 separate contexts

A tool with more than 2100 distinct entries and often with external references are available as an Excel + VBA work book posted in the Terms Ad-hoc


Documents

44066 000 MEF Terminolgy Database 2013-01-18 Fishburn