RMSP-CAT6T-12 lightning and surge protector provides superior lightning and surge protection for up to 12 lines with improved frequency response for indoor 10/100/1000 Ethernet networks. The unit has low line to line and line to ground capacitance to minimize distortion of high-speed signals. This design provides protection for both common and differential mode surges. The RMSP-CAT6T-12 utilizes gas discharge tubes on each pair for superior power handling capability.