APC Surge Module for Analog Phone Line, Replaceable, 1U, use with PRM4 or PRM24 Rackmount Chassis

APC Surge Module for Analog Phone Line, Replaceable, 1U, use with PRM4 or PRM24 Rackmount Chassis Advanced Surge Protection Against Damaging Power Transients Traveling Over Computer, AV and Network Data Lines Includes: User Manual