towerMAX LL-T1 from ITWLinx is a high-speed digital T1 or leased line protector with Auto-Resetting Technology, which protects T1 or ISDN lines. The PTC resistors open when a surge occurs, protecting your equipment, but unlike other fusses, the PTCs close again once the surge passes. The unit offers expandable system protection using towerMAX Series Base Units. They also feature Signal Perfect Circuitry for auto-resetting surge protection for data networks, telephone and coax lines with RJ-48C/48S termination type.
Manufacturer part number: MLLT1