NFRRSA and Cobb County have created an Inter RF Subsystem Interface (ISSI) link that allows users of certain Cobb County talk groups to automatically roam onto the NFRRSA system in certain areas where the Cobb County system has weak coverage but the NFRRSA system has strong coverage. A temporary talk group on the NFRRSA system is automatically assigned and linked back to the user's home talk group on the Cobb County system. Currently, Cobb County PD Precinct 4 units have access to such a temporary, automatically created ISSI patch on the NFRRSA system. The talk groups below are part of a pool of talk groups that are automatically randomly assigned by the NFRRSA system for these temporary ISSI links on an as-needed basis, with no user, dispatcher or system administrator intervention required.