Assmann WSW Sockets, Cable Mount Black – 4/6/8-Pin – Assmann WSW A-20040, This A-20040 RJ10 Socket Cable Mount Black from Assmann WSW is a tall, right-angled, socket with rounded back and 4 pins. Manufactured with phosphor bronze contacts and nylon UL94V-0 insulator material, this unshielded female socket offers 40MΩ max. contact resistance, plus an operating voltage of 125V DC. Assmann WSW A-20040 4 Pin RJ10 Socket Cable Mount Black