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: LIANSHU RS232 DB9Pin Female to RJ11 RJ12 6P6C LAN Network Serial Console Cable L=6FT (1Pack) : Electronics