This object specifies a forward signal that, when used as the first forward signal, indicates the call is being originated by test equipment rather than a real subscriber. Marking a call this way lets network elements exclude it from normal subscriber billing and traffic statistics, so seeing this signal in call records specifically flags test/maintenance traffic that should not be counted the same way as customer calls. A carrier's automated line-testing system placing a routine continuity check call would set this as its first forward signal so downstream billing systems recognize and exclude the call from customer invoices.