Cisco Systems OL-4660-01 Introducing Cisco Call Back, Overview of Cisco Call Back Architecture

Chapter 4 Cisco Call Back

Introducing Cisco Call Back

Introducing Cisco Call Back

The following sections provide information about the Cisco Call Back feature:

•Overview of Cisco Call Back Architecture, page 4-2

•Cisco Extended Functions Service Dependency, page 4-5

•Multiple Cisco Extended Functions Applications in a Cluster, page 4-6

•How to Use Cisco Call Back, page 4-7

Overview of Cisco Call Back Architecture

The Cisco Call Back feature uses the Cisco Extended Functions (CEF) service. The CEF service comprises the following interfaces:

•Cisco CTIManager Interface (QBEHelper), page 4-3

•Cisco CallManager Database Interface (DBL Library), page 4-3

•Call Back Handler, page 4-4

•Screen Saver and Call Back Dictionary, page 4-4

•Redundancy Manager, page 4-4

•DB Change Notifier, page 4-4

•SDI Trace and Alarm, page 4-5

The CEF service interfaces with the phone by using the XML services interface (XSI) over skinny protocol (a protocol that is used between a Cisco IP Phone and Cisco CallManager) and the Quick Byte Encoding protocol (a protocol that is used between the Cisco CTIManager and TSP/JTAPI). See Figure 4-1.

	Cisco CallManager Features and Services Guide
4-2	OL-4660-01