For POTS voice band service the M-ADSL-Filter provides protection from ADSL signals which may impact through non-line or other remote devices (handset fax voice band modem etc) and central office operations. For ADSL signals it also provides protection from the high frequency transient and impedance effect that occur during POTS operations (ringing transients on-hook off-hook transient and so on). Because the POTS splitter in the M-ADSL-Filter connects directly to the subscriber loop media it also provides some protection for externally induced line hits or faults which could damage any attached equipment or endanger people interacting with the installed equipment. The circuit protection will be provided mostly by standard central office line protection means and additional protection measures built into the POTS splitter to protect against line overstress which could damage the splitter itself.