Rapoport adds that the Giants have also had their fourth-round pick in the 2017 draft moved to the end of the round following any compensatory picks.
The hand-held communication device was used for five plays on an early fourth-quarter drive that ended in an interception on a pass intended for Victor Cruz, Rapoport added last week. As the Giants worked to fix McAdoo's communications equipment, the coach was handed a walkie-talkie as a replacement for the malfunctioning communications system.
The league said last Thursday that it was looking into the matter.
"League policy prohibits a coach from using such devices in a game," an NFL spokesman told NFL.com, "because he would not be cut off from talking by the switch operator for the coach-to-player helmet communication system. Communication is cut off when the play clock reaches 15 seconds or when the ball is snapped."