MSPPs 4, 5, 6, and 7 are equipped with EoS/RPR cards to
support the E-LAN connectivity requirements of the dedicated network.
Table 11.6 summarizes the incremental costs of using EoS-equipped MSPPs to deliver
the Ethernet services in this example network. These solution costs use the typical unit
costs in Table 11.5 and, for simplicity, do not consider fiber costs (i.e., they assume the
required fiber already exists).
EoS Network
Element
Typical Cost:
Common Equipment + SONET
and DS-n Interfaces
Typical Cost:
EoS Transport Interface
Card (GFP/VCAT/LCAS)
Typical Cost:
EoS/RPR Card
MSPP
(OC-12/48/192)
$40,000 $4000 $6000
?µ-MSPP
(OC-12)
$10,000 $1000 N/A
TABLE 11.5 EoS Network Elements in the Example Network
SONET/MSPP 323
This simple example shows that EoS can be a cost-effective general-purpose access
technology for a variety of Ethernet service profiles and deployment scenarios. However,
as the ???IOF in place??? and ???IOF + access in place??? scenarios illustrate so clearly, its real
power lies in its ability to leverage the investment of the enormous installed base of
SONET network elements. Once a SONET network featuring MSPPs is in place to
support IOF and access for circuit services??”a commonplace scenario for many large
service providers??”the equipment cost to deliver Ethernet services using that infrastructure
becomes marginal.
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