Newcastle Falcons consultant director of rugby Steve Diamond says the sport's disciplinary process "is flawed" as he begins a six-match ban against Northampton Saints on Friday.
Diamond, 56, was given the suspension for abusing match officials at the end of a 17-15 defeat at Exeter Chiefs on 29 March.
He was upset about Exeter's match-winning try in the last minute being awarded and angrily confronted the officials after the game.
Diamond admitted the charge, describing the incident as a "huge mistake", but says more experienced officials may be needed.
He said: "There's a problem with the disciplinary system, not a problem with the referees.