McDewey

Preferred Architecture for Cisco Collaboration Release 15 On-Premises Deployments PAGE 15
Call Control

Call Control Call control is the core element for any communications deployment. It provides endpoint registration, call processing, and call admission control. Call control design considerations include the dial plan, endpoint addressing scheme, calling party presentation, call admission control, codec selection, PSTN connectivity, and general trunking requirements, as well as other factors. Cisco Unified Communications Manager (Unified CM) provides a common call control platform for all Cisco Collaboration deployments (Figure 5). Having a highly available and common call control component for a communications infrastructure is crucial to provide consistent services for all devices and communication types and to preserve a uniform dial plan and a consistent feature set across the deployment. Adding the IM and Presence Service to a Cisco Unified CM deployment provides instant messaging, network-based presence, and federation for third-party chat servers, and it enables the use of Cisco Jabber for instant messaging, presence, and audio and video communications. Figure 5. Architecture for Call Control