Telecommunications Glossary of terms used on this site

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Term Definition
Carrier Ethernet

Carrier Ethernet is a set of extensions to the original Ethernet LAN protocol, enabling telecommunications carriers and providers to make use of Ethernet technology within their private network infrastructures, and provide a physical Ethernet interface (to the carrier network) and related services to customers. Carrier Ethernet is also distinguishable from LAN Ethernet by its standardized set of services, scalability, reliability, quality of service (QoS) and service management attributes.


Committed Burst Size, or CBS, is a parameter associated with Committed Information Rate (CIR) that indicates the size up to which subscriber traffic is allowed to burst in profile and not be discarded or shaped.

Aliases (separate with |): Committed Burst Size

A Customer Edge device, or CE, is a router or switching device that is physically located at a customer premise.

Aliases (separate with |): Customer Edge Device

Customer Edge Virtual LAN Class of Service, or CE-VLAN CoS, represents the state of user_priority bits in the Institute of Electrical and Electronics Engineers (IEEE) 802.1Q Tag within a Service Frame that is either tagged or priority tagged.

Aliases (separate with |): Customer Edge Virtual LAN Class of Service

Customer Edge Virtual LAN ID (CE-VLAN ID) is a derivable identifier from within the content of a Service Frame that allows the Service Frame to be associated with an Ethernet Virtual Connection (EVC) at the User Network Interface (UNI). The CE-VLAN ID also represents the identity of the Virtual LAN(s) (VLAN) on the Ethernet port of the customer equipment that is attached to the UNI.

Aliases (separate with |): Customer Edge Virtual LAN ID

Customer Edge Virtual LAN Tag, or CE-VLAN Tag, is the IEEE 802.1Q Tag in a tagged Service Frame.

Aliases (separate with |): Customer Edge Virtual LAN Tag

A Circuit Emulation Service, or CES, is a service that transports Time Division Multiplexing (TDM) based traffic over a Carrier Ethernet Network (CEN).

Aliases (separate with |): Circuit Emulation Service

Circuit Emulation Services over Ethernet


Committed Information Rate (CIR) is the minimum guaranteed throughput that a network must deliver for the service under normal operating conditions, and a specific Bandwidth Profile parameter, defining the average rate (expressed in bits per second) of ingress Service Frames up to which the network delivers Service Frames and meets the performance objectives defined by the Class of Service (CoS) attribute. A Bandwidth Profile property where a pre-determined level of Bandwidth Profile compliance for each Service Frame, if present, is ignored when determining the level of compliance for each Service Frame.

Aliases (separate with |): Committed Information Rate

A Codec is a device or computer software program that enCOdes and DECodes a digital signal or stream of data. Codecs are commonly used to make optimal use of bandwidth during data transmission while maintaining the quality of the data streams for voice, video, streaming media, videoconferencing applications.

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