Portal:Telephones/Selected audio

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Selected audio 1

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Example of a North American dial tone
Listen to a dial tone from North America of 350 Hz + 440 Hz.
Example of a UK/British dial tone
Listen to a dial tone from the United Kingdom of 350 Hz + 450 Hz.
Example of a current European dial tone
Listen to a European dial tone of 425 Hz
Example of a French dial tone
Listen to a French dial tone of 440 Hz
Example of a Japanese dial tone
Listen to a Japanese dial tone of 400 Hz
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A

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. If no digits are forthcoming, the partial dial procedure is invoked, often eliciting a special information tone and an intercept message, followed by the off-hook tone, requiring the caller to hang up and redial. (Full article...
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Selected audio 2

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Example of a North American busy signal
Listen to a busy signal from North America.
Example of an old North American busy signal
Listen to a busy signal from North America used prior to 1980.
Example of a European busy signal
Listen to a busy signal from Europe.
Example of a French busy signal
Listen to a busy signal from the France
Example of a United Kingdom busy signal
Listen to a busy signal from the United Kingdom.
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A

signal to the calling party that indicates failure to complete the requested connection of that particular telephone call. (Full article...
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Selected audio 3

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Example of a North American Off-hook tone

Listen to an off-hook tone from North America.
High Tone

Some central office switches in the United States, notably older GTD-5 EAX systems, utilize a single frequency tone, 480 Hz, known as High Tone for this purpose. Listen to an older 480Hz off-hook tone.
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The

off-hook without use for an extended period, effectively disabling the telephone line. (Full article...
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Selected audio 4

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UK, Ireland, and NZ audible ringing tone
A ringing tone from the United Kingdom, Ireland, and New Zealand
Australian ringing tone
Australia audible ringing tone
European ringing tone
A European ringing tone per ETSI standard
Japanese ringing tone
French ringing tone
A French ringing tone
North American ringing tone
Audible ringing tone from North America
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cell phone and smartphone technology ringing tone can be customized and even used for advertising. (Full article...
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Selected audio 5

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Example of a North American reorder tone
Listen to a reorder tone from North America.
Example of a European reorder tone
Listen to a reorder tone from Europe.
Example of a British reorder tone
Listen to a reorder tone from the United Kingdom.
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The reorder tone, also known as the fast busy tone, or the congestion tone, or all trunks busy (ATB) tone is an audible call progress tone in the public switched telephone network (PSTN) that is returned to a calling party to indicate that the call cannot be processed through the network. (Full article...)

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Selected audio 6

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DTMF dialing
audio output of a DTMF signal.
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Dual-tone multi-frequency signaling (

switching centers. DTMF was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use in push-button telephones supplied to telephone customers, starting in 1963. DTMF is standardized as ITU-T Recommendation Q.23. It is also known in the UK as MF4. (Full article...
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Selected audio 7

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2600 Hz
A 2600 Hz tone (LOUD)
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2600 hertz (2600 Hz) is a frequency in hertz (cycles per second) that was used in telecommunication signaling in mid-20th century long-distance telephone networks using carrier systems. (Full article...)

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Selected audio 8

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RO' SIT
Reorder – intraLATA
VC SIT
Unassigned N11 code, CLASS code or prefix
NC' SIT
No Circuit – intraLATA
IC SIT
Intercept
IO SIT
Ineffective/Other
Future SIT
Future Use (Not Used)
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In

call progress tone consisting of three rising tones indicating a call has failed. It usually precedes a recorded announcement describing the problem. (Full article...
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Selected audio 9

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IC SIT
Intercept tone played by The TeleZapper (plays 2 times)
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The TeleZapper is a device designed to reduce the number of telemarketing-related phone calls a household receives by imitating the tone signal normally played by a phone company to indicate a line has been disconnected. The Telezapper was created by Privacy Technologies, Inc, a wholly owned subsidiary of Royal Appliance Mfg. Co. (Full article...)

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Selected audio 10

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Example of Last-call return from Verizon Home Phone Service
Listen to
NANP number, 987-654-3210), voiced by Pat Fleet
.
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telecommunication feature offered by telephony service providers to subscribers to provide the subscriber with the telephone number, and sometimes the time, of the last caller. The service may also offer the facility to place a call to the calling party. (Full article...
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Selected audio 11

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USA Red Boxing Tone
The .25 USD tone sequence.
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A

Radio Shack tone dialers, personal MP3 players, and audio-recording greeting cards. (Full article...
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Selected audio 12

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Reproduction of an IOS phone disconnect tone (not the original audio)

A

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). (Full article...
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Selected audio 13

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Multi-frequency dialing
These multi-frequency tones were generated by automated switching equipment. The blue box was designed to replicate these tones.
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A blue box is an electronic device that produces tones used to generate the in-band signaling tones formerly used within the North American long-distance telephone network to send line status and called number information over voice circuits. This allowed an illicit user, referred to as a "phreaker", to place long-distance calls, without using the network's user facilities, that would be billed to another number or dismissed entirely as an incomplete call. A number of similar "color boxes" were also created to control other aspects of the phone network. (Full article...)

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