As this simple analysis shows, the MSPP provides a powerful tool for service providers
to build networks that support a wide variety of services, including fast-growing
Ethernet services and the large base of traditional TDM services.
Scenario MSPPs
MSPP EoS
Transport Cards
MSPP EoS/
RPR Cards
Micro-
MSPPs
Micro-MSPP EoS
Transport Cards Solution Cost
Greenfi eld 7 2 4 2 2 $334,000
IOF in place 4 2 4 2 2 $214,000
IOF + access
in place
0 2 4 0 2 $34,000
TABLE 11.6 Example Network Solution Costs
8 Increasing the number of subscribers also decreases the amount of service bandwidth that the carrier can
allocate per subscriber. For example, when the OC-12 access ring delivers E-Line services to two subscribers,
each of those E-Line subscribers may enjoy up to approximately 300Mbps of dedicated bandwidth (assuming
for this illustration that the service provider evenly allocates the dedicated bandwidth among the subscribers
on the ring). When that ring supports a total of eight subscribers, each of those subscribers may access up to
roughly 75Mbps of dedicated bandwidth. For simplicity, and because many types of access networks share
this tradeoff, the bandwidth per subscriber is not considered in the per-subscriber cost analysis.
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