The Cisco Unified Real-Time Monitoring Tool, which runs as a client-side application, monitors the real-time behavior of your system components. Unified RTMT uses Hypertext Transfer Protocol Secure (HTTPS) and Transmission Control Protocol (TCP) to monitor the following:

• System performance

• Device status

• Device discovery

• Computer Telephony Integration (CTI) applications

Unified RTMT can connect directly to devices through HTTPS to troubleshoot system problems.

Note	Even when Unified RTMT is not running as an application on your desktop, tasks such as alarm and performance monitoring updates continue to take place on the server in the background.

Unified RTMT allows you to perform the following tasks:

• Monitor a set of predefined management objects that monitor the health of the system.

• Generate various alerts, in the form of email messages, for objects when values go above or below user-configured thresholds.

• Collect and view traces in various default viewers that exist in Unified RTMT.

• View syslog messages in SysLog Viewer.

• Work with performance-monitoring counters.

• Unified Communications Manager only: Translate Q931 messages.

A single copy of Unified RTMT that is installed on your computer lets you monitor more than one server or more than one cluster at a time. For example, you can monitor all of the following entities:

• A Unified Communications Manager product on one server.

• An IM and Presence Service product on one server.

• A Unity Connection product on one server.

• A server on a cluster (to monitor the health of the cluster).

Note	From Release 15SU2 onwards, Unified CM supports the TLS 1.3 protocol. The other supported TLS versions are TLS 1.0, 1.1, and 1.2.

The Oracle JDK 1.8 (8u341 or later) version natively supports the TLS 1.3 protocol. To ensure compatibility, the 15SU2 Release version of the Unified RTMT client must be run on JDK 1.8 (8u341 or later).