When can a substitute player be entered in volleyball?

Answer 1

When nothing is currently happening and the coach makes a hand signal to the referee that he or she wants to substitute in a player. When nothing is currently happening and the coach makes a hand signal to the referee that he or she wants to substitute in a player.

Answer 2

Yes, as someone on the bench could be a better server than the person about to serve.

with what ever you are doing

Answer 3

yes i think so