The system forwards a call only once. For example, assume that extension A designates extension B as its forwarded-to destination, and that extension B designates extension C as its forwarded-to destination. When someone calls extension A, the system first attempts to ring the call at extension A. If the system is unable to ring the call at extension A, the system attempts to ring the call at extension B. If the system is unable to ring the call at extension B, the system redirects the call to the coverage path of extension A, if a coverage path is available at extension A, and if the coverage criteria of extension A are satisfied when applied at extension B. The system does not forward the call to extension C under any circumstances.