Designed for use with voice and low data applications with punch down blocks, patch panels, and distribution boxes- Can also be used as extension cables- 24 AWG unshield twisted pair (UTP) Category 3 rated cable- Includes one 50-pin male telco connectors (RJ21) and one 50-pin female telco connector (RJ21) - Avialable in 5, 10, 15, and 25, 50, 75, and 100ft