In Figure 2.16, the ISP may have a 1GbE UNI, while the subscribers??™ UNIs
1 and 2 may be 100 Mbps. There is no service multiplexing at the subscriber UNI. The
service attributes are also shown in the figure.
Other Commercial Applications of Carrier Ethernet Services Carrier Ethernet is increasingly
being employed for several traditional and emerging applications that require
carrier-class performance while minimizing the cost of delivery. A sample of some of
the popular revenue-generating and value-added applications being enabled by Carrier
Ethernet services includes packet video, VoIP and VoIP peering, Layer 2 VPNs, content
peering, extranet connectivity, business continuity and disaster recovery, IP backbone
expansion, and wireless backhaul.
Most of these are implemented over straightforward E-LINE services and, in some
cases, over an E-LAN service. The simple but fairly encompassing nature of basic
Ethernet services has enabled Service Providers to tailor a wide range of customized
Figure 2.16 Dedicated Internet access using E-LAN service type (Source: MEF)
UNI
Service Attribute
Physical Medium
Speed
Mode
MAC Layer
IEEE 802.
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