Hirschmann - 943301001 - Terminal Cable, RJ11 to DB9 Straight, Black, 5 m Length, 0-60 C, 943 Series - Allied Electronics & Automation, part of RS Group
Amazon.com: RJ11 Cable ADSL 10ft Extension Lead Phone Cord Telephone Plug High Speed Xfinity Internet Broadband Male to Male Router and Modem to RJ11 Phone Socket/Microfilter/Landline Wire (Black) : Electronics
Adapter cable RJ11 male / RJ45 male (10 meters) - RJ11 & RJ12 connectivity Generic on LDLC