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- Operational Benefits of Cisco IP Telephony
- ROI
- Where It All Started
- Cisco Architecture in the Beginning
- Cisco Architecture Evolution
- Summary
This chapter is from the book
Cisco Architecture Evolution
Figures 1-2 and 1-3 represent the evolution of the Cisco architecture and the migration of the technology. Figure 1-2 provides a view of how the network architecture looked in 2001 at the beginning of the migration. Figure 1-3 demonstrates how calls come in to the network, how they tandem through the PBX, and how voice mail and intercluster calling are performed.
Figure 1-2 Traffic Flow Example of Voice Mail and Intercluster Calling