This document is intended to provide guidance in planning Emergency Medical Systems [sic] (EMS) communications. Processes and and procedures are presented for such planning. Recommendations for obtaining technical, consultative and other assistance in designing and implementing EMS systems are given.In addition, this report is designed to familiarize the non-technical person with common communication terms, concepts and helpful references. Fundamental elements of land-mobile radio are introduced, and details of citizen access and emergency medical repsonses are addressed. Planning a 911 emergency system is discussed. The development of an EMS command and control center is highlighted. Frequency-assignment regulations and selected configurations for an EMS system are introduced.