Riverstone Networks Network Device SSG - Manual (Page 13)

Packet Overlay
Network Consolidation
Customers interested in operational and/or STP
consolidation cost reductions from their legacy
STP networks can utilize the greater capacity of
the Alcatel 5070 SSG ANSI to fold multiple existing
STPs into a single platform. Public switched
telephone network (PSTN) circuit-based networks
designed six to ten years ago typically located
STPs in geographic regions based on carrier
transport costs at the time. Carrier transport
costs have been declining for several years,
eliminating the cost-effectiveness of having many
small STPs, each requiring maintenance and
yearly software/hardware upgrades. As shown
in Figure 4, the Alcatel 5070 SSG ANSI can easily
support very large numbers of links with
unequaled reliability and capacity to facilitate
consolidation.
Many customers with existing circuit-based
networks are planning to implement overlay VoP
networks. These customers will require additional
SS7 link connectivity and capacity from their
legacy STPs to support the new overlay VoP
networks. Most legacy STP networks will not
have the available capacity or connectivity to
support both a circuit-based and a VoP network.
The hardware costs alone to upgrade legacy
STPs to support an additional overlay network
will make the Alcatel 5070 SSG ANSI a cost-
effective alternative.
A L C AT E L 1 1 >
ARCHITECTURE
Network 3 Network 1
Network 2
Part. 1
SPC=a
5070 SSG
Part. 0
SPC=x
Part. 2
SPC=b Part. 3
SPC=c
Joint IN,
NP, etc.
Figure 4 - MOPC Network Consolidation