10. An E-LINE service type can
be used to create a broad range of Point-to-Point Ethernet services between two UNIs.
In its simplest form, an E-LINE service type can provide symmetrical bandwidth for
data sent in either direction with no performance assurances, for example, best effort
service between two 10 Mbps UNIs. In more sophisticated forms, an E-LINE service
type may be between two UNIs at different speeds and may be defined with performance
assurances such as CIR with an associated CBS, EIR with an associated EBS,
delay, delay variation, and loss.
Service multiplexing may occur at neither, one, or both UNIs in the EVC. For example,
more than one Point-to-Point EVC can be offered on the same physical port at one
or both of the UNIs. An E-LINE service without any service multiplexing, for example,
is very much like the common TDM-based private leased line service (where a UNI
physical interface is required for each EVC) except that with an E-LINE service, the
range of bandwidth and connectivity options is much greater.
Ethernet LAN (E-LAN) Service Any Ethernet service that is based upon a Multipoint-to-
Multipoint Ethernet Virtual Connection (EVC) is designated as an Ethernet LAN (ELAN)
service type.
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