A call stops the tile just discarded. In American play you expose the finished group on the rack.
There is no chow, so you call only for identical tiles or to declare a win.
A call interrupts the player who was about to draw.
Expose the group you called
In American play you expose the finished group on the rack. There is no chow, so you call only for identical tiles or to declare a win. A call interrupts the player who was about to draw.
If the card wanted that group concealed, calling it breaks the line.