Unified Messaging – General Statistics Test

How good a user’s voice mail experience with Exchange is depends upon how quickly Unified Messaging processes incoming calls, resolves the caller IDs, and delivers the service. Frequent call failures, unexpected call disconnects, and high call latencies not only impact the users’ voice mail experience, but also provoke users to doubt the efficiency of Unified Messaging. If such doubts are to be avoided and user confidence on Unified Messaging is to be improved, administrators should use the Unified Messaging – General Statistics test at regular intervals to check the overall health and performance of Unified Messaging and proactively detect performance bottlenecks. This way, administrators can quickly initiate the required remedial measures and can clear the bottleneck, before end-users complain.

Target of the test : A Microsoft Exchange 2013/2016 server

Agent deploying the test : An internal agent

Outputs of the test : One set of results for the Microsoft Exchange 2013/2016 server being monitored

Configurable parameters for the test
Test period - How often should the test be executed Host - The host for which the test is to be configured. port – The port at which the host listens.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
Successful caller ID resolutions:	Indicates the percentage of caller IDs that were resolved successfully.	Percent	A high value is desired for this measure.
Successful extension caller ID resolutions:	Indicates the percentage of successful attempts to resolve caller IDs that contained no "@" or "+" signs and were of the same length as the dial plan's extension.	Percent	A high value is desired for this measure.
Average call duration:	Indicates the average duration of calls since the service was started.	Secs
Average latency:	Indicates the average time from the moment a voice mail event occurs and Unified Messaging receives confirmation from the IP gateway that the message was delivered.	Secs	This average is calculated over the last 50 messages. A consistent rise in this value is indicative of poor Unified Messaging performance.
Calls disconnected:	Indicates the number of calls that were disconnected because they exceeded the UM maximum call length.	Number	The value of this measure includes all types of calls, including fax calls.
Calls disconnected by user failure:	Indicates the total number of calls that disconnected after too many user entry failures.	Number
Active calls connected to UM server:	Indicates the number of calls that are currently connected to the UM server.	Number	This is a good indicator of the current workload on the UM server.
Active fax calls connected to UM server:	Indicates the number of fax calls that are currently connected to the UM server.	Number	Voice calls become fax calls after a fax tone is detected. This is a good indicator of the current fax call workload on the UM server.
Subscribers connected to the UM server:	Indicates the number of logged on subscribers who are currently connected to the UM server.	Number	This is a good indicator of the current user load on the UM server.
Active voice mail calls:	Indicates the number of voice mail calls that are currently connected to the Unified Messaging server.	Number
Delayed calls:	Indicates the number of calls that experienced delays longer than 2 seconds.	Number	Ideally, the value of this measure should be 0. A high value indicates that too many calls are delayed. The reason for the delay should then be investigated and resolved.
User response latency:	Indicates the average response time for the system to respond to a user request.	Secs	A high valu or a steady increase in this value is indicative of the poor responsiveness of the UM server.