Head coach Stu Lang will miss either the first or second regular-season game of the 2013 Canadian Interuniversity Sport season.
The incident occurred in an Oct. 20 game against York, when a member of Guelph's football staff used a two-way radio to communicate with the Guelph bench. This was in addition to the two lines of communication already provided for verbal contact between the spotters' box and the sideline.
Guelph won the game 39-18.
In addition, the university has been fined $1,500 and must write a letter of apology to York University's football coaching staff.
"We take this allegation very seriously and fully accept the OUA findings and subsequent penalties," Guelph director of athletics Tom Kendall said in a statement. "We demand that each of our sports comply with all OUA regulations and we will have procedures in place to help prevent this in the future."