Power switch
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Switch on the body. This function allows you to turn off the power to the load without disconnecting the filter itself from the mains — in other words, it eliminates the need to once again remove the filter plug from the outlet and insert it back. Most often, the switch controls all filter outlets, however, there are models where some of the connectors are bypassed and are always energized, regardless of the position of the switch.
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A switch for each outlet. This feature makes it easier to manage the power of connected devices: unplugging and plugging individual outlets is usually easier and faster than unplugging and plugging back in. Thus, electrical appliances used with such a filter can be kept constantly connected to it, turning off and on individual outlets as needed.
— Switch for each circuit. The function is used in models with numerous outlets. Allows you to simultaneously disable half of them, leaving the rest working. It combines the convenience of the points listed above and at the same time does not clutter up the device with unnecessary switches.
It is also worth noting that there are models that combine both a switch on the case and a switch for each outlet.
Phone jacks
The number of
telephone jacks provided in the design of the filter.
The presence of such connectors means that the filter can also be used to protect the communication line from various interference. Such protection is especially important when sending faxes and connecting to the Internet over a telephone line — these types of communications are quite susceptible to interference. The minimum number of telephone jacks, if any, is 2, input and output. Many filters with this function have 3 connectors — an input and 2 outputs (to the phone and to the computer); There are more, but extremely rare.
Coaxial connectors
The number of coaxial connectors provided in the extension cord. If this is a traditional antenna signal, then only 1 connector is provided at each end of the extension cord (mother or father). If we are talking about connecting multimedia devices using an RCA connection, then there can be 2 or 3 connectors on each side of the cable.
