This obsolete read-only integer, from 0 to 100 and defaulting to 95, is the warning threshold percentage for trunking session licensing, controlling when the system generates warnings that usage is nearing capacity, and is valid for both ITU and ANSI protocol variants. Admins used this to get advance warning before trunking license capacity was fully exhausted. For example, at the default of 95, the system would warn once trunking session usage reached 95 percent of licensed capacity.