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SESR
|
Severely Errored Second Ratio
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SF
|
Super Frame
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SI-
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Service Interworking (e.g., SI-NNI)
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Single Rate Service
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A service that only specifies a CIR/CBS and no EIR/EBS.
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SI-NNI
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Service Interworking NNI
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SLA
|
Service Level Agreement
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SLS
|
Service Level Specification
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SNI
|
Service Node Interface
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SONET
|
Synchronous Optical Network
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SRLG
|
Shared Risk Link Group
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SSM
|
Synchronization Status Message
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SSRC
|
Synchronization Source (a field within the RTP protocol, RFC 3550)
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STP
|
Spanning Tree Protocol
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Structure-agnostic
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Structure-agnostic emulation is the transport of unstructured TDM, or of structured TDM when the structure is completely disregarded by the transport mechanism.
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Structure-aware
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Structure-aware emulation is the transport of structured TDM taking at least some level of the structure into account.
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Structure-indicated
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Encapsulation utilized for Structure-Aware TDM transport where TDM structure boundaries are indicated by pointers
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Structure-locked
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Encapsulation utilized for Structure-Aware TDM transport where TDM structure boundaries are indicated by packet payload boundaries
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Subscriber
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The organization or customer purchasing and/or using Ethernet Services. Alternate term: Customer
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S-VLAN
|
Service VLAN (also referred to as Provider VLAN)
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TAF
|
Transport Adaptation Function
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TALS
|
TDM Access Line Service
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TCF
|
Transport Connection Function
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TCI
|
Tag Control Information
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TCP
|
Transmission Control Protocol
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TDM
|
Time Division Multiplexing (examples of TDM services include Nx64 kbit/s, DS1, DS3, E1, E3, OC3, STM1, OC12, STM3)
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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.
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TE
|
Transport Equipment
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Tester
|
Special equipment used to generate and monitor traffic for verification purposes.
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T-Line
|
TDM Line Service
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TLV
|
Type, Length and Value
|
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TRAN
|
Transport Layer
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Transparency
|
A term used to describe that the content of a Service Frame is delivered unaltered across a MEN
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Transport
|
A specific TRANS layer technology
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TRAN-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 sink.
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TrCP
|
Traffic Conditioning Point
|
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TSP
|
TDM Service Processing
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TTF
|
Trail Termination Function
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UNI
|
The UNI is the physical interface or port that is the demarcation between the customer and the service provider/Cable Operator/Carrier/MSO
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UNI C
|
A compound functional element used to represent all of the functional elements required to connect a MEN subscriber a MEN implementing a UNI N.
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UNI EVC ID
|
A UNI service attribute
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UNI Identifier
|
A UNI service attribute
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UNI List
|
An EVC service attribute
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UNI Maximum Transmission Unit Size
|
The maximum sized Service Frame allowed at the UNI.
|
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UNI-N
|
A compound functional element used to represent all of the functional elements required to connect a MEN to a MEN subscriber implementing a UNI C. The functional elements within the Customer Edge that supports the MEN Subscriber’s technical capabilities and compliance to the UNI specification. A set of one or more functional elements that supports the MEN Service Provider’s technical capabilities and compliance to the UNI specification.
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Unicast Service Frame
|
A Service Frame that has a unicast destination MAC address
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|
Unicast Service Frame Delivery
|
An EVC service attribute
|
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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.
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User Network Interface
|
The User Network Interface (UNI) is the physical interface or port that is the demarcation between the customer and the service provider/Cable Operator/Carrier/MSO. The physical demarcation point between the responsibility of the Service Provider and the responsibility of the Subscriber.
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VC
|
Virtual Container
|
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VLAN
|
Virtual Local Area Network
|
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VLAN ID
|
VLAN Identifier
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VPLS
|
Virtual Private LAN Service
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VPWS
|
Virtual Private Wire Service
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VT
|
Virtual Tributary
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WAN
|
Wide Area Network
|
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WG
|
WG is the amount of traffic accepted as Green over the time interval T that should be delivered to the egress UNI
|
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WTR
|
Wait to Restore
|
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WY
|
WY is the amount of traffic accepted as Yellow over the time interval T that may be delivered to the egress UNI
|
|
xSTP
|
Spanning Tree Protocol (multiple variations)
|
