There are 3 cases when Tom called Mary.
Case 1: Mary's phone was engaged or busy,
Case 2: Mary's phone rang but she didn't take the call
Case 3: Mary's phone rang and Mary did take the call but the reception was poor and they couldn't hear each other, so after 2 minutes they hung up the phone and have not talked to each other.
In which cases, can we say "Tom called, and he got through to Mary"?