Multi-Agency Radio Communications System (MARCS)
- Provides information on the new 800-megahertz, voice and data network for the Ohio highway patrol and other health, safety and emergency agencies. Includes downloadable documents in pdf format .
- http://oit.ohio.gov/SDD/NetworkServices/index.aspx

Harris County Regional Radio Center
- Provides and manages mobile and portable radio communications for county departments and qualified agencies. Located in Texas, USA.
- http://www.hctx.net/itc/trsradio/rsg.htm

Governor's Office of Emergency Services ACS/EAS Page Link
- California
- http://acs.oes.ca.gov/

Alaska State
- Provides an introduction to the statewide two-way radio system and links to how various state agencies use the facilities .
- http://www.state.ak.us/local/akpages/ADMIN/info/Guide/6_5strs.htm

Shelby County Alabama 9-1-1 Center
- Provides information on provided services including staff, statistics, scanner frequencies, and education. Includes a photograph gallery .
- http://www.shelby911.org/

Pennsylvania's Public Safety Radio Project
- Offers information on the project to modernize and unify the state agencies' two-way radio communications systems.
- http://www.radio.state.pa.us/

California's Governor's Office of Emergency Services (OES)
- Coordinates the state's master mutual aid system which includes the two major sub-systems of law enforcement and the fire and rescue systems.
- http://www.qsl.net/n6uru/mutualaid.htm