Implementing a location and historical trend based quality of session in unified telephony can begin with establishing a conference call. The location of each end-user device can be determined and a query of a previously established data store with historical trend data for quality of session for each end-user device based on the location of an identifier for the end user device can be performed. If the results of the querying indicate that an end-user device has a relatively low quality of session below a baseline established for the conference call, a corrective action designed to ensure the conference call is conducted with a quality of session at or above the baseline can be performed. Alternatively, the location and historical trend data and analysis for the collaboration session can be presented to a human moderator, who can be prompted to select a desired corrective action.