Black Box RS-232 Serial Surge Protector - 18Vdc Clamping Voltage, 60-Amp, DB25, 25-Wire - 2 x DB-25 - 18 V DC Input - RS-232 - TAA Compliant - TAA Compliance
The perfect add-on for short-haul modems, concentrators, A/B switches, muxes, repeaters, or other devices that are designed to span long cable runs but are prone to noise and surges.