Monoprice Phone Cable, RJ12 (6P6C), Straight for Data - 7ft - Monoprice.com
Know the Difference- RJ9, RJ11, RJ12, RJ45, RJ48 & Pinout
Amazon.com: RJ12 to RJ12 Cable 1m 6P6C Flat Extension Lead Phone Cord Telephone Plug Connector Male to Male Router/Modem to Phone Landline Socket Switchboard Lead Data Plug Wire RJ-12 to RJ-12 (White) :
Amazon.com: AmzDeals (2 Pack) 6 Feet Black RJ12 6P6C Male to Male Straight Wired Cable, Pro Grade Data and Voice Phone Line Cord - Made in USA : Electronics
RJ12 TO RJ12 PLUG 6P6C 6 WIRE TELEPHONE LINE CORD,CROSS OVER REVERSE WIRED CABLE | eBay