User's Guide

First InterComm

™

System User Guide

A29798 Page 3

November 2007

jurisdictional communications. This temporary IAN (Figure 2) exists as long as

VCA100-equipped vehicles are present, and can expand or contract as first responders

enter or leave the area.

FM UHF

450 MHz

P25

800 MHz

FM VHF

150 MHz

P25

800 MHz

FM Low Band

30 MHz

First InterComm IAN

FM UHF

450 MHz

P25

800 MHz

FM VHF

150 MHz

P25

800 MHz

FM Low Band

30 MHz

First InterComm IAN

Figure 2. The Incident Area Network (IAN) Expands or Contracts as Needed

At some point, when numerous first responders are on-line, overall coordination can be

beneficial. The IC has the OPTION to assume control of the IAN using any laptop

computer operating with Windows XP and equipped with Wi-Fi and ICTCS (Figure 3).

The ICTCS allows the IC to:

• Establish sectors by frequency in accordance with the DHS National Incident

Management System (NIMS);

• Isolate any agency equipped with FICS units (e.g., Fire, EMS, Emergency

Management, Public Works, law enforcement) as required into the appropriate

Talkgroup, thereby

» Ensuring a single chain of command;

» Improving communications efficiency; and

» Increasing emergency responder safety.

Refer to First InterComm

™

System Incident Commander Talkgroup Control Software

(BAE Systems Document No. A29800) for details on the ICTCS.