When Cisco United Attendant Console Advanced is integrated with Cisco UCM. which Cisco UCM Service does the Cisco TSP Instance communicate with directly?

The Cisco Telephony Service Provider (TSP) is a client-side driver that enables TAPI-compliant applications, such as the Cisco Unified Attendant Console Advanced, to interact with Cisco Unified Communications Manager (UCM). The TSP instance on the attendant console server establishes a direct and persistent TCP/IP connection to the Cisco CTI (Computer Telephony Integration) Manager service running on a UCM server. The CTI Manager service acts as the dedicated gateway for all third-party CTI applications, authenticating them and brokering communication for call control and event monitoring with the core Cisco CallManager service.

B. Cisco DirSync Service: This service is responsible for synchronizing user data from an external LDAP directory into the UCM database, not for real-time call control.
C. Cisco CallManager Service: While this is the core call processing engine, the TSP does not communicate with it directly. The CTI Manager service is the intermediary for all CTI application traffic.
D. Cisco TAPS Service: The Tool for Auto-Registered Phones Support (TAPS) is used for bulk phone provisioning and has no role in CTI integration for attendant consoles.

1. Cisco Unified Communications Manager Administration Guide

Release 12.5(1)SU1

"Computer Telephony Integration" Chapter.

Reference: In the "CTI Manager" section

it states

"The Cisco CTI Manager contains the CTI components that interface with TAPI... applications. The CTI Manager service communicates with the Cisco CallManager service..." This establishes the CTI Manager as the direct interface for TAPI/TSP clients.

2. Cisco Unified TAPI Developer Guide for Cisco Unified Communications Manager

Release 12.5(1)

"Cisco TAPI Architecture" Chapter.

Reference: The section "Cisco TAPI and Cisco Unified Communications Manager" explicitly states

"The Cisco TAPI Service Provider (TSP) interfaces with the Cisco Unified Communications Manager by using the CTI Manager." An accompanying architectural diagram visually confirms that the TSP connects directly to the CTI Manager.

3. Cisco Unified Attendant Console Advanced - Administration and Installation Guide

Release 12.5

"Configure the Cisco TSP" section.

Reference: The configuration steps for the Cisco TSP require the administrator to enter the IP addresses of the UCM servers that are running the CTI Manager service. This demonstrates that the TSP is configured to connect directly to the CTI Manager.