The Pre Call Diagnostic Tool is a really interesting tool that has been available in 64 and 32bit versions for quite some time now but it still surprises me how many customers don’t realize its available for their use for free. The 64 bit version is available when you down load the OCS 2007 R2 Reskit and the 32 bit version is a separate download since it was only available after the release of the Reskit.
This tool offers the ability for a user to check the current state of the network before making an enterprise voice call. It is most useful when users are using networks that are uncontrolled like the internet, so great for testing you network access back to the OCS AV edge.
The screen shot below is the tool open on the desktop showing a good connection back to my corporate network. This is just after starting the tool.
The next shot shows the tool after its been up and running on my desktop for a while. It is showing a little bit of jitter but still good conditions to make a call. Some variation delay is normal on any network so this small amount of jitter is none to be concerned about.
This next shot is of the allowed settings and log file location. Similar to Communicator it uses the same DNS methods to locate the edge or internal pool resources, hence the use of a user SIP URI to find the correct SIP domain. You do not need to be logged onto Communicator to use the tool.
The last shot shows the tool minimized in the Task Bar. So if the tool is left running you will be able to see network conditions before making a call.
Hopefully for those that didn’t already know of its existence this has been of some help.