In App Store, locate and install the Avaya IX Workplace app
In the setup wizard, accept the prompts to allow the app to make and manage calls, access your microphone, etc.
Accept the software license
Choose "configure my account"
Select the gear in the upper right corner, and choose
"Use a Web Address"
In the "Web Address" field, enter the following text: http://sm-onex.voip.me.edu/46xxsettings.txt
and click "next"
The app will configure your settings and launch a quick tutorial.
Some things to note: Using the name directory may not always work, but entering an extension number should produce a dial.