- White High Density RJ-11 Voice Keystone Jack 25 Pack- Designed for all voice connectivity applications- 6P6C Cat 3 Voice- Lead frame technology provides maximum performance and superior signal quality- Terminate with any standard 110 punch down tool- Includes an integrated USOC/UTP color wiring diagram- Compatible with all faceplates, decorative inserts, surface mount boxes, and blank patch panels- Works with telephone line cords- Installation instructions included- UL listed