1) Spiral patch cord2) Coiled patch cord3) Connector: RJ11, RJ12, RJ45, RJ48, RJ50 Electrical: 1. Hi-Pot Test: DC300V 2. Insulation Resistance: 10M Ohms (Min) 3. Contactor Resistance: 2 Ohms (Max) 4. 100% Open Short and Miss Wire Test http://www.comark-elec.com/pid11309443/Spiral+patch+cord.htm