| 1.1 The Evolution of Telephony in the Enterprise |
|---|
| 1.1.1 A Basic Telephone System |
| 1.1.2 Traditional Telephone Company Services |
| 1.1.3 Digital Telephone Technologies |
| 1.1.4 Digital Telephone Services |
| 1.1.5 PBXs and Centrex Services |
| 1.1.6 Long-Distance Services |
| 1.1.7 The Concept of Convergence |
| 1.2 Describing Converged Network Requirements |
|---|
| 1.2.1 Hierarchical Network Model |
| 1.2.2 Cisco Enterprise Architecture |
| 1.2.3 Traffic Conditions in a Converged Network |
| 1.2.4 Intelligent Information Network |
| 1.2.5 Cisco SONA Framework |