The standard procedure is for each side to issue fibs commands to move/roll/accept/decline etc.. and try to determine from the fibs response what/who it is waiting for.

Since the client itself might be stuck waiting for a message from fibs, that fibs already sent but that never arrived, you (or your opp)  may have to manually enter the commands directly to the fibs server.

Sending a move manually is a hassle.. you have to figure out what direction fibs has arbitrarily set for that particular game and match the move numbers to that board notation.  Probably not worth it unless it is a tournament game