Wholesale telephone connection box And Other Telecom Products - Alibaba.com
Telephone Junction Box One Line Divided Into Five Lines One Input Five Output Splitter Telephone Multi-line Distributor - Pc Hardware Cables & Adapters - AliExpress
1-port Desktop Telephone Junction Box Terminal Wiring Cat3 Extension Cable Adapter 6p4c Rj11 Connector For Analog Digital Phone - Pc Hardware Cables & Adapters - AliExpress
Source 6P4C rj11 telephone junction box on m.alibaba.com