Unified Messaging Call Router Test

The Client Access server runs the Unified Messaging Call Router service. This service receives an incoming call and forwards it to the Mailbox server. Additionally, where users configure their mobile numbers and call forwarding as part of their voice mail settings, this service also receives missed call notifications, which it forwards to the Mailbox server. If this service keeps rejecting inbound calls and notifications, end-user experience with voice mail will suffer, resulting in dissatisfied, unproductive users. To avoid this, administrators should monitor calls to this service and proactively capture call rejections, before it impacts user experience. This is exactly what the Unified Messaging Call Router test does. This test keeps track of the inbound calls to the UM Call Router service and brings unusually high rate of call rejections to the attention of administrators, so that potential dips in the quality of the voice mail service can be proactively detected and addressed.

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 Exchange server being monitored

Configurable parameters for the test
  1. Test period - How often should the test be executed
  2. Host - The host for which the test is to be configured.
  3. port – The port at which the host listens.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Rejected inbound calls:

Indicates the percentage of inbound calls that were rejected by the Microsoft Exchange Unified Messaging Call router service over the last hour.

Percent

Ideally, the value of this measure should be 0. If this measure reports an abnormally high value – say, over 50% - it is a cause for concern. In this case, review the event logs on the Client Access server (CAS) to determine whether the UM objects, such as umipgateway and umhuntgroup, are configured correctly.

If the event logs do not contain enough information, you may have to enable UM event logs at the Expert level, and then review the UM trace log files.

Proxied and rejected missed call notifications:

Indicates the percentage of missed call notifications that were proxied to and rejected by the Microsoft Exchange Unified Messaging over the last hour.

Percent

Ideally, the value of this measure should be 0. If this measure reports a non-zero value, it indicates that one/more missed call notifications were rejected by the service.

In this case, review the event logs on the Client Access server (CAS) to determine whether the UM objects, such as umipgateway and umhuntgroup, are configured correctly.

If the event logs do not contain enough information, you may have to enable UM event logs at the Expert level, and then review the UM trace log files.

Inbound calls received:

Indicates the total number of inbound calls that were received by the service since startup.

Number

 

Inbound calls rejected:

Indicates the total number of inbound calls that were rejected by the Microsoft Exchange Unified Messaging Call Router service since its startup.

Number