With the increasing deployment of Cisco Unified Communications solutions, dial plans have become more complex to implement, especially in large enterprises that consist of numerous call control devices. Some examples of these call control devices are Cisco Unified Border Element, Cisco Unified Survivable Remote Site Telephony (SRST), Cisco Unified Communications Manager, Cisco Unified Communications Manager Express, and Cisco IOS gateways.
To simplify dial plan implementation in large deployments, it is desirable that call control devices dynamically exchange call-routing information so that no any-to-any static configuration is required. Cisco Service Advertisement Framework (SAF) allows services to be propagated through SAF-enabled network devices. Cisco Call Control Discovery (CCD) is the first application that utilizes SAF to advertise services: the reachability of internal directory numbers and Public Switched Telephone Network (PSTN) backup numbers.
This course explains how SAF works, describes its components, and shows how to configure it. The course also describes how CCD utilizes SAF to dynamically exchange call-routing information and how you can implement CCD in Cisco Unified Communications Manager and in Cisco IOS Software.Learning Objectives
- Identify the scalability issues in large networks consisting of multiple call agents
- Describe the characteristics of SAF
- Describe the characteristics of CCD
- Describe the workings of CCD
- Distinguish between the configuration elements of an internal and external SAF client
- Identify the steps involved in the configuration of the external SAF client
- Sequence the steps to configure an internal SAF client
- Describe the considerations for implementing CCD and SAF