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  2. Off-hook tone - Wikipedia

    en.wikipedia.org/wiki/Off-hook_tone

    The signal is applied to the local loop by the switching system for permanent signal treatment to alert an end user (subscriber) of an off-hook condition of the telephone set, i.e. that the telephone handset should be placed on-hook. Before playing the signal, a certain timeout has to elapse, and on some systems an intercept message is ...

  3. Telephone line - Wikipedia

    en.wikipedia.org/wiki/Telephone_line

    In most cases, two copper wires (tip and ring) for each telephone line run from a home or other small building to a local telephone exchange. There is a central junction box for the building where the wires that go to telephone jacks throughout the building and wires that go to the exchange meet and can be connected in different configurations ...

  4. Multi-frequency signaling - Wikipedia

    en.wikipedia.org/wiki/Multi-frequency_signaling

    Using MF signaling, the originating telephone switch sends a start signal to seize the line, taking the circuit off-hook. The terminating office acknowledges the seizure with a ready state by responding with a wink start signal, which is a momentary off-hook condition. The originating office then sends address information to the terminating switch.

  5. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    The specifications define several test features for line conditions, such as quiet line and busy line, and test tones transmitted to callers. Telephone numbers are assigned for ring back to test the ringer when installing telephone sets, milliwatt tone (a number simply answers with a continuous test tone ) and a loop around (which connects a ...

  6. Vizio details specs on Vizio Tablet and Vizio Phone, reveals ...

    www.aol.com/news/2011-01-03-vizio-details-specs...

    Vizio has unveiled more about its plans for the new year which seem to consist largely of a huge push on Android, from the 4-inch phone and 8-inch tablet running a (still unspecified) flavor on ...

  7. Line signaling - Wikipedia

    en.wikipedia.org/wiki/Line_signaling

    Line signaling is a class of telecommunications signaling protocols. [1] Line signaling is responsible for off-hook , ringing signal , answer, ground start , on-hook unidirectional supervision messaging in each direction from calling party to called party and vice versa.

  8. Supervision (telephony) - Wikipedia

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

    The signal may be implemented by removal of battery on the circuit (open switching interval) or by polarity reversal of the tip and ring conductors of the telephone line. An analogue telephone line may also send tones, such as a busy signal , reorder tone , or dial tone , to indicate a call has ended.

  9. Get 24x7 Live Tech Support for Any Device | AOL

    www.aol.com/products/tech-support

    AOL Tech Live Support provides 24x7 access to AOL experts along with assistance for nearly any technical issue you might have, on nearly any device.