Dailies and similar types of transfers are comprised of multiple takes or scenes, each recorded while locked to unique time-of-day timecode. In between each take, timecode does not continue but stops completely. Because of this, the timecode on dailies and similar source material is said to be “discontinuous” or discontinuous (also known as broken timecode).
By default, Pro Tools drops out of recording when it goes offline due to broken timecode. However, you can change this behavior so that Pro Tools will instead remain armed, waiting to begin recording again when lock is re-established with the timecode of the next take.