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Towermax LL(T-1) Module PANLL(T1) Towermax LL(T-1) for leased ISDN and T1 lines RJ-48S. Protects two 4-wire leased ISDN or T1 lines per module (pins 1 2 4 5 7 8 protected). Features auto-resetting solid state sneak current protection. Use with Towermax KSU base unit. Includes 2 six-foot RJ-48S cords. Clamp level 70 volts.