Search for "IP Office" and look for older software versions (pre-R9.0).
The software is a single application that changes behavior based on your user licenses: Downloading the Software - Avaya Documentation avaya ip office phone manager download
For users on R9.0 through R11.x and the current IP Office Release 12 , Phone Manager is no longer included in the standard admin suite. How to Download Phone Manager Search for "IP Office" and look for older