... Separated voice signal and ADSL digital signal from telephone signal.· Protect the voice signal and ADSL digital signal from interference of a telephone ... /a fax.· Metal parts:Nickel plated Phosphor Bronze/Brass· The modular jack ... gold plated surface of 1u" 3u", 6u", 15u", 30u",50u".· The modular jack can be 6P2C, 6P4C, 6P6C, 8P2C, 8P4C, ...