This read-write Integer32 (0-120 seconds) sets how long the system waits for each subsequent input digit after the first, restarting on each digit received until the destination address is fully identified; if it expires without identifying a destination, the caller hears a tone and the call is abandoned. Administrators tune this to accommodate callers who dial slowly or pause between digits, versus reclaiming resources quickly from abandoned dialing attempts. For example, increasing this value on lines used by elderly or rotary-style callers who dial more slowly would reduce accidental call abandonment due to premature timeout.