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  2. Ringing (signal) - Wikipedia

    en.wikipedia.org/wiki/Ringing_(signal)

    In electrical circuits, ringing is an oscillation of a voltage or current.Ringing can be undesirable because it causes extra current to flow, thereby wasting energy and causing extra heating of the components; it can cause unwanted electromagnetic radiation to be emitted [citation needed]; it can increase settling time for the desired final state; and it may cause unwanted triggering of ...

  3. Ringing (telephony) - Wikipedia

    en.wikipedia.org/wiki/Ringing_(telephony)

    Ringing is a telecommunication signal that causes a bell or other device to alert a telephone subscriber to an incoming telephone call. Historically, this entailed sending a high-voltage alternating current over the telephone line to a customer station which contained an electromagnetic bell.

  4. Ringing artifacts - Wikipedia

    en.wikipedia.org/wiki/Ringing_artifacts

    The main cause of ringing artifacts is overshoot and oscillations in the step response of a filter.. The main cause of ringing artifacts is due to a signal being bandlimited (specifically, not having high frequencies) or passed through a low-pass filter; this is the frequency domain description.

  5. Ringing tone - Wikipedia

    en.wikipedia.org/wiki/Ringing_tone

    Ringing tone (audible ringing, also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party. The tone is typically a repeated cadence similar to a traditional power ringing signal (ringtone), but is

  6. Ringtone - Wikipedia

    en.wikipedia.org/wiki/Ringtone

    The telephone exchange immediately removes the ringing signal from the line and connects the call. The ringing pattern is known as ring cadence, in which the high voltage ring current is switched on and off to create the pattern. In North America, the standard ring cadence is two seconds of ringing followed by four seconds of silence.

  7. Ringing - Wikipedia

    en.wikipedia.org/wiki/Ringing

    Ringing (signal), unwanted oscillation of a signal, leading to ringing artifacts; Vibration of a harmonic oscillator. Bell ringing; Ringing (telephony), the sound of a telephone bell; Ringing (medicine), a ringing sound in the ears

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  9. Ringdown - Wikipedia

    en.wikipedia.org/wiki/Ringdown

    In telephony, ringdown is a method of signaling an operator in which telephone ringing current is sent over the line to operate a lamp or cause the operation of a self-locking relay known as a drop. Ringdown is used in manual operation, and is distinguished from automatic signaling by dialing a number. The signal consists of a continuous or ...