How would you make sure that first responders are able to communicate with each other and a command center?

There are many new developments in information technology (IT) that could benefit first responders, particularly in regard to communication. Obviously, first responders make excellent use of telephone systems, but there are more advanced steps to take.
First, you’d want to ensure that there is a consolidated intranet for communication, probably with a central node focused at the responders' base site. That way, all communication could be monitored and rerouted as necessary. Additionally, it would greatly benefit the responders to install mobile hotspot WiFi systems in their vehicles to allow for VoIP calling if there is poor cellular service and to facilitate chat systems like Cisco Jabber. A partner, other than the driver, in each vehicle could maintain written and verbal communication, thereby documenting everything and preventing confusion or allowing for communication when silence is of the essence. There are many options available, especially with the rapid development of IT infrastructure.