- High Speed Digital T1 or Leased Line Protector- Protects up to one T1 or ISDN line per port using RJ48C/48S connectors. ISDN - BRI/PRI compatible. - 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: T1, ISDN - Agency Approval: UL 497A (Secondary) - Grounding Requirements: Uses Electrical AC Ground - Recommended Grounding Impedance: <0.5 Ohm - Signal Perfect Circuitry - Auto-Resetting PTCs: 160 mA (8-10 Ohms) - Clamping Level: 70V - Response Time: 1-5 Nanoseconds - Capacitance: <50pF - Suppression Modes: Metallic and Longitudinal - Wires Protected: 4-wires, 2 pairs per jack (pins 1, 2, 4, 5)- Termination Type: RJ48C or RJ48S