Signal filters block or decrease (attenuate) unwanted frequencies or signal wave characteristics.

Active low pass filters pass signals from low frequencies and reject signals from high frequencies.

Active filters are electronic filers that use active components such as voltage amplifiers or operational amplifiers.

Active band pass filters are used to attenuate frequencies below and above a range of frequencies (i.

IC electronic filters are frequency-selective circuits that consist of devices such resistors, capacitors, inductors, transistors, or operational amplifiers coupled with reactive components.

Cable assemblies are collections of wires or cables banded into a single unit with connectors on at least one end.

Channel service units (CSU) and data service units (DSU) are digital interface devices that connect end user data communications equipment to digital access lines.