Modular Adapter Kit DB9 Female to RJ11 RJ12 Black | Computer Cable Store
UIS Lighting Adapter Type-B, for RJ11/12 Connector Lights with Resistor Dimmers - AC Infinity
5pcs RJ11 to Screw Terminal Adaptor RJ11 Male to 4 Pin connector RJ11 splitter for CCTV DVR CCTV accessory|4 pin male|4 pin splitter - AliExpress
Amazon.com: 3.5 Feet RJ9/RJ11/RJ12 Headset Adapter Extension Cord Quick Disconnect Release Connector from Male to Female 4P4C RJ9 Plug for Plantronics, Jabra, Desk Office Phones : Electronics
Voice T Adapter 1 Male to 2 Female | Computer Cable Store
QD to RJ11 adapter cable + universal switch – TELLUR
THE CIMPLE CO - Duplex Modular Phone Wall Jack Adapter (WHITE) RJ11 - Splitter - One Pack - Walmart.com
Amazon.com: RJ45 to RJ11 Cable, 6 Feet Phone Jack to Ethernet Adapter RJ11 6P4C Male to RJ45 8P8C Male Connector Plug Cord for Landline Telephone : Electronics
Amazon.com: XCZZYB Phone Jack to Ethernet Cable Adapter, RJ45 8P8C Female to RJ11 6P4C Male for Landline Telephone Service (2 Pack) : Electronics
RJ11 Duplex Jack Adapter - Ivory
Amazon.com: Uvital RJ11 Duplex Wall Jack Adapter Dual Phone Line Splitter Wall Jack Plug 1 to 2 Modular Converter Adapter for Office Home DSL Fax Model Cordless Phone System, White(2 Packs) : Electronics