VoIP Performance Management and Optimization

Appendix B. Detailed Call Flows

The following sections cover various call flows for the deployment models discussed in Chapter 3, “VoIP Deployment Models in Service Provider Networks,” Chapter 4, “Internet Telephony,” and Chapter 5, “VoIP Deployment Models in Enterprise Networks.” These call flows explain the interaction between the devices, including Call Agent, Cisco Unified Communications Manager (CUCM), IP phones, gateways, and gatekeepers. They also provide context to performance and trend analysis discussion, which were discussed in Chapter 7, “Performance Analysis and Fault Isolation,” and Chapter 8, “Trend Analysis and Optimization.”

MGCP Call Flows

The PacketCable deployment model discussed in Chapter 3 uses Media Gateway Control Protocol ...