The median wage of a full-fledged communications professor in the United States is approximately $80,514.
However, lower-ranked communications professors have much lower median wages. These range from approximately $40,000 to $60,000, depending on the instructor's classification (entry-level to associate professors).
Source: The College and University Professional Association for Human Resources 2007-08 National Faculty Salary Survey.
Available at http://www.higheredjobs.com/salary/salaryDisplay.cfm?SurveyID=9