RJ9 to RJ11 Adapter, Female RJ9 (4P4C) Jack to Male RJ11 (6P4C) Plug

AmzDeals 1-Pack RJ9 to RJ11 Adapter, Female RJ9 (4P4C) Jack to Male RJ11 (6P4C) Plug

NECABLES 2Pack RJ9 Cable 10ft Phone Cord Telephone Cable RJ9 / RJ10 / RJ22 4P4C Male to Male Straight for Both Data and Voice Use Black - 10 Feet

TENINYU RJ9 4P4C 4 Conductor Straight Modular Telephone Data Extension Flat Cord Cable Silver 7FT 2PACK