Ringback number

Ringback number

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 plays a low frequency tone into the line to indicate that it's working, at which point the technician "flashes" the line (hangs up very briefly) to indicate they want a ringback. This makes the ringback play a higher tone to indicate it is working, and then the technician hangs up. The phone will then ring, answering only with a tone if picked up.

The tone is added so that telephone subscribers will not be able to easily use the ringback system as an "intercom," to call other extensions of their own phone line by simply initiating a ringback test and waiting for the phone to stop ringing (so as to know when the other person has answered).


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • 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

  • Automatic number announcement circuit — An automatic number announcement circuit (ANAC) is a special telephone number that is meant to be used by phone company technicians and other telecommunications technicians to determine the phone number of a particular line. The way an ANAC works …   Wikipedia

  • Silent number — In telephony, a silent number, unlisted number (US) or ex directory number (UK) is a telephone number that is intentionally not listed in telephone books.Silent numbers often exist as certain telephone numbers that link to specific tests or… …   Wikipedia

  • Telephone numbers in New Zealand — New Zealand telephone numbers Location Country New Zealand Continent Oceania Access codes Country calling +64 International prefix 00 …   Wikipedia

  • Lineman's handset — A lineman s handset is a special type of telephone used by technicians for installing and testing local loop telephone lines. It may also be called (including slang) a test set, butt set, goat, or buttinski.ComponentsA typical lineman s handset… …   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

  • Mobile content — is any type of media which is viewed or used on mobile phones, like ringtones, graphics, discount offers, games, movies, and GPS navigation. As mobile phone use has grown since the mid 1990s, the significance of the devices in everyday life has… …   Wikipedia

  • Brring — Infobox Website name = Brring type = Phone advertising caption = Brring Logo url = [http://www.brring.com/ Brring.com] commercial = Yes author = Brring, Inc. registration = Required to create number owner = Brring, Inc. current status =… …   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

  • Ringtone — For the Weird Al Yankovic song, see Ringtone (song). For the film, see Ringtone (film). A ringtone or ring tone is the sound made by a telephone to indicate an incoming call or text message. Not literally a tone, the term is most often used today …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”