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A disconnect tone in telephony is a tone provided to the remaining party to a call after the remote party hangs up. [ 1 ] [ 2 ] Typically, the disconnect tone is a few cycles of the reorder , busy , or the off-hook tone (e.g. in US), or between five and fifteen seconds of the Number Unobtainable tone (e.g. in UK).
A dial tone (dialling tone in the UK) is a telephony signal sent by a telephone exchange or private branch exchange (PBX) to a terminating device, such as a telephone, when an off-hook condition is detected. It indicates that the exchange is working and is ready to initiate a telephone call. The tone stops when the first dialed digit is recognized.
The weight of the receiver depresses the spring-loaded switchhook thereby disconnecting the idle instrument (except its bell) from the telephone line. One of two possible signaling states, such as tone or no tone, or ground connection versus battery connection. Note: if on-hook pertains to one state, off-hook pertains to the other.
Calling party control (CPC), or forward disconnect, is a telecommunication signal sent from a central office to the telephone subscriber's equipment to indicate that the calling party has hung up. This indicates that answering machines should stop recording, notifies conference call bridges that a participant has left or removes an abandoned ...
A disconnect tone in telephony is a tone provided to the remaining party to a call after the remote party hangs up. Typically, the disconnect tone is a few cycles of the reorder , busy , or the off-hook tone (e.g. in US), or between five and fifteen seconds of the Number Unobtainable tone (e.g. in UK).
Please check your main telephone and extensions, then try your call again. Thank you." The message may be repeated, then followed by a loud, rasping off-hook tone intended to remain audible even if the handset is on the desktop instead of at the subscriber's ear. This tone is louder than the standard busy/fast busy signal.
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 ...
Tone generator, emits a 2600 Hz tone to disconnect a long-distance call while retaining control of a trunk, then generates multi-frequency tones to make another toll call which is not detected properly by billing equipment. Black box A resistor bypassed with a capacitor and placed in series with the line to limit DC current on received calls ...