Know the Difference- RJ9, RJ11, RJ12, RJ45, RJ48 & Pinout
DB9 to Modular (RJ11 RJ12 RJ45) Adapter | Deep Surplus
DB25 to Modular (RJ11 RJ12 RJ45) Adapter | Deep Surplus
Rj11/Rj12/RJ45 Telephone/Network Adapter Connector One Us Plug Male to Dual Female Modular Jack - China Telephone Adapter, Network Adapter | Made-in-China.com