ringback tone

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• Ringback tone — A Ring back Tone (RBT), or Audible Ringing Tone or Ring back Signal, is the audible ringing that is heard on the telephone line by the calling party after dialing and prior to the call being answered at the receiving end. This tone assures the… …   Wikipedia

• Ringback tone — Tonalité de retour d appel Une tonalité ou sonnerie de retour (d appel), ou ringback tone (anglicisme), est un signal sonore entendu sur une ligne téléphonique par une personne qui émet un appel, après avoir composé le numéro de son correspondant …   Wikipédia en Français

• Ringback — may refer to:* Ringback tone, the audible ringing that is heard by the calling party after dialing * Ringback number, a number used by phone companies to test whether a telephone line and phone number is working * Automatic ring back, a telephony …   Wikipedia

• Ringback number — is a number used by many phone companies to test whether or not a new telephone line is working correctly and the phone number is routing properly.Typically it works by calling a ringback number and then hanging up. Often the ringback number… …   Wikipedia

• Dual-tone multi-frequency signaling — One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual tone multi frequency signaling (DTMF) is used for telecommunication signaling over… …   Wikipedia

• Dial tone — For the G.I. Joe character, see Dial Tone (G.I. Joe). A dial tone (known in the British Isles as a dialling tone)[1] is a telephony signal used to indicate that the telephone exchange is working, has recognized an off hook, and is ready to accept …   Wikipedia

• Call-progress tone — In telephony, call progress tones are audible tones sent from the PSTN or a PBX to calling parties to indicate the status of phone calls. Equipment such as fax machines and modems are designed to recognise dial tones and busy tones.The ITU T… …   Wikipedia

• Off-hook tone — The off hook tone (also receiver off hook tone or off hook warning) is a telephony signal used to alert a user that the telephone has been left off hook for an extended period, effectively disabling the telephone line. See permanent signal.… …   Wikipedia

• Reorder tone — The reorder tone, also known as the fast busy tone, is the congestion tone or all trunks busy (ATB) tone of a public switched telephone network. It varies from country to country; in the USA it is a dual frequency tone of 480 Hz and 620 Hz at a… …   Wikipedia

• Disconnect tone — 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 or busy tone (e.g. in US), or between five and fifteen seconds of… …   Wikipedia

• Precise Tone Plan — The Precise Tone Plan specification for the North American network defines the Call progress tones used for standard signaling in the PSTN. The tones are as follows:* dial tone is a continuous tone having frequencies of 350 and 440 Hz at a level… …   Wikipedia