- Analog Station Set and Central Office Line Protector- Protects up to 8-wires (4-pairs) using 110 punchdown block on the input and 110 punchdown block or 4 RJ11 or 2 RJ45 on output.- Auto-Resetting Technology: PTC resistors open when a surge occurs, protecting your equipment, but unlike other fuses, the PTCs close again once the surge passes.- Expandable modular system- Applications: Analog and Central Office lines for PBX or KSU - Agency Approval: UL 497A (Secondary)- Grounding Requirements: Uses Electrical AC Ground- Recommended Grounding Impedance: <0.5Ohm- Signal Perfect Circuitry- Auto-Resetting PTCs: 160 mA (8-10 Ohms)- Clamping Level: 260V- Response Time: 1-5 Nanoseconds- Capacitance: <50pF- Suppression Modes: Metallic and Longitudinal- Wires Protected: 50-wires (25-pairs) - Termination Type: 110 punchdown input, RJ11/RJ45 or 110 punchdown output