The following links will take you to the Federal Emergency Management Agency (FEMA) independent study courses dealing with the Incident Command System (ICS) and emergency communications:

IS-100.a Introduction to Incident Command System
    Course:  http://emilms.fema.gov/IS100A/index.htm
    Exam: http://training.fema.gov/EMIWeb/IS/examnotice.asp?eid=is100a

IS-200.a ICS for Single Resources and Initial Action Incidents
    Course: http://training.fema.gov/EMILMS/IS200A/index.htm
    Exam: http://training.fema.gov/EMIWeb/IS/examnotice.asp?eid=is200a

IS-700.a NIMS An Introduction
    Course: http://emilms.fema.gov/IS700a/index.htm
    Exam: http://training.fema.gov/EMIWeb/IS/examnotice.asp?eid=is700a

IS-800.b National Response Framework, An Introduction
    Course:  http://emilms.fema.gov/IS800B/index.htm
    Exam: http://training.fema.gov/EMIWeb/IS/examnotice.asp?eid=is800b

IS-802 ESF #2 Communications
    Course: http://training.fema.gov/EMILMS/IS802/index.htm
    Exam: http://training.fema.gov/EMIWeb/IS/examnotice.asp?eid=is802