The GC ELECTRONICS 30-9729 mid-size flush wall jack assembly provides a convenient and reliable connection point for modular line cords. Designed for installations where a larger opening is required, this wall jack eliminates external wires and offers a clean aesthetic. It's suitable for residential and commercial applications where a robust and discreet telephone connection is needed. Complies with FCC part 68, UL Standard 1863 and Article 800-51 of the National Electrical Code.