A plug locking assembly comprises a housing comprising a top surface, a bottom surface and opposing sidewalls defining an open space therebetween, the open space for receiving and carrying a plug comprising a spring member. The plug locking assembly is adapted to prevent unwanted access to modular plugs engaged in associated jacks. In one embodiment, the plug locking assembly comprises a plug protection member comprising a surface spaced apart from the open space and positioned to overlie at least a portion of the spring member with the plug engaged within the housing. The plug locking assembly may further comprise a locking clip releasably securable within the housing.