QVS CDSL-2P 2Port DSL Line Filter with Phone Jack

This DSL line conditioner/filter connects directly between the wall jack & voice device to eliminate electrical noise coming from the DSL line that interferes with telephone equipment. Provides unfiltered DSL and filtered phone jacks. (Rev 2; Connectors: 1 RJ11 Male to 2 RJ11 Female; Filtered Lines: Pin# 3 & 4)