The final step is to make sure that it works. This can be the most difficult testing tasks for an average Exchange administrator who is not familiar with the telephony elements of the infrastructure.
Make sure that the following critical functions are tested:
• The UM server is operating.
• The UM server can connect to the gateway and PBX.
• The UM server can be reached from an internal phone.
• The UM server can be reached from an external phone.
Figure 20.16 shows the paths of the critical tests.
The specific commands and steps for testing are discussed in the following sections.