12 Terminology
Throughout this document the following terminology is used:
Differentiated Services Code Point. Code contained in the IP
header used to determine the priority of IP packets.
Data rate of a DSL span available to the application
Synonymous to DSL Linerate
Connection between STU-C and STU-R, composed of one or
more wire pairs.
Physical synchronization rate of a DSL wire pair
Embedded Operations Channel, an overhead channel available in
SHDSL for management purposes
Line Termination Unit, functionally equivalent to STU-C
Network Termination Unit, functionally equivalent to STU-R
Synchronous Terminal Unit – Central Office Side. The end of a
DSL span that starts up and controls the link. Typically installed at
the central office
Synchronous Terminal Unit – Remote Side. The end of a DSL
span that is controlled by the STU-C. Typically installed at the cus-
tomer premises
Virtual LAN Identifier, a.k.a "VLAN Number". The unique identifier
of a VLAN. Carried in the VLAN Tag of an Ethernet frame.
Virtual LAN (IEEE 802.1q)
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