NFRRSA and Cobb Regional Radio System (CRRS) have created an Inter RF Subsystem Interface (ISSI) link that allows users of certain CRRS talkgroups to automatically roam onto the NFRRSA system in certain areas where the CRRS has weak coverage but the NFRRSA system has strong coverage. A temporary talkgroup on the NFRRSA system is automatically assigned and linked back to the user's home talkgroup on CRRS. Currently, Cobb County Police Precinct 4 units have access to such a temporary, automatically created ISSI patch on the NFRRSA system. The talkgroups below are part of a pool 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.