In the case of a cycle slip, the curve will suddenly jump (the red solid line in the figure). And since this epoch, the subsequent phase observation sequence all have equal steps.
In the case of a weekly jump, the curve will suddenly jump (the solid red part of the figure). And since the beginning of the calendar, the sequence of follow-up phase observations has taken an equal step.
In the case of cycle jump, the curve will jump suddenly (the red solid line in the figure). Moreover, since the epoch, the successive phase observation sequences all have the same step.