Separate ADSL or ADSL2+signals from voice signals on telephone lines to protect voice signals and ADSL digital signals from interference from telephones and fax machines
Durable, high hardness, durability, safety, and long service life
It's just an ordinary telephone splitter with a filter on one of its outputs. They allow the internet to work on your computer through a phone line (connected to a modem, of course)
Stable signal transmission, clear communication, suitable for answering machines, telephones, and fax machines