Which Cisco Unified Communications Manager plug in allows administrators to proactively monitor the overall health of their Cisco cluster?

RTMT (Real-Time Monitoring Tool) is a downloadable plug-in from Cisco Unified CM Administration that connects to the cluster and provides real-time visibility into CPU, memory, database replication, service states, and alert thresholds. It is the primary tool for proactive health monitoring of a Cisco UCM cluster, allowing administrators to detect and respond to issues before they impact users.

The Cisco AXL Toolkit provides a SOAP-based API for provisioning and configuration data access, not real-time health monitoring.

The Cisco CTL Client is used to configure the Certificate Trust List for cluster security, not for monitoring cluster health.

Cisco JTAPI is a Java telephony API used by third-party applications to control calls and devices, not for infrastructure health monitoring.

Cisco TAPS (Tool for Auto-Registered Phones Support) automates phone configuration for users with auto-registered phones and has no monitoring capability.