Unified Communications Phones and Peripherals Datasheet

This datasheet lists all of the phone and peripheral devices that are qualified to display the "Optimized for Microsoft Communicator" mark.
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=74bd3ec0-c7dc-4111-a9b7-a9afbdc86aa9#filelist

Unified Communications Retired Devices Optimized for Microsoft Office Communicator

This document lists the phone and peripheral devices that were previously qualified to display the "Optimized for Microsoft Communicator" mark, but are no longer in distribution.
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=9852117a-103a-4ecb-a045-bfe4c93f75b7#filelist