L-Com E412F10Base-T RJ21 Telco Harmonica Female 50-pin break out to RJ45 (8P4C) x 12 ports PN-phB-xxx Specifications: Breakout 50-pin Telco RJ21 style connectors to 12 10Base-T wired RJ45 jacks Includes hook and loop style hold-down straps to eliminate screw tightening Two holes for mounting to a wall or panel Includes double-sided foam tape for mounting convenience Available with a female 50-pin RJ21