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- Ringback_number abstract "Ringback number is a number used by many telephone company linemen/technicians to test whether or not a new telephone line installation is working correctly and the phone number is routing properly.Typically a lineman tests the terminal equipment (telephone set) ringer by calling a "ringback telephone number" or ringback vertical service code and then hanging up and waiting for the phone to ring. Often upon connection the ringback number plays a low frequency signal tone into the line to indicate that it's working and ready, at which point the technician "flashes" the line (hangs up very briefly) one or more times to select a ringback. A higher pitched signal tone then indicates ringback is engaged, and the technician hangs up. The phone will then ring, answering only with a verification tone if picked up.The verification 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 and converse when someone has answered the extension.Some ringback numbers are very local or regional in scope, while others are state-/province- or area-code-wide: there appears to be no consistent national system for them. Every telephone company, whether large or small, determines its own ringback numbers for each individual central office, which tends to perpetuate the current situation of a mess of overlapping and/or spotty areas of coverage.Under the North American Numbering Plan, most North American area codes reserve telephone numbers beginning with 958 and 959 for internal testing. Some companies also reserve 999 for test exchanges. Numbers within these test exchange block ranges are used for various types of local and long-distance testing; generally, this block includes a ringback number (to test the ringer when installing telephone sets) and a loop around (which connects a call to another inbound call to the same or another test number). Ringback numbers may appear in the 958 exchange, but there is no requirement that they reside there.Some large telephone companies have toll-free numbers set up for ringback. In most cases, these numbers remain undisclosed to prevent abuse. Some companies change their ringback number every month to maintain secrecy. Some carriers (such as Bell Canada) have been known to disable all payphone calls to 958 or 959 test lines.".
- Ringback_number wikiPageID "450637".
- Ringback_number wikiPageLength "5846".
- Ringback_number wikiPageOutDegree "28".
- Ringback_number wikiPageRevisionID "675151275".
- Ringback_number wikiPageWikiLink Automatic_number_announcement_circuit.
- Ringback_number wikiPageWikiLink Bell_Canada.
- Ringback_number wikiPageWikiLink Category:Telephone_numbers.
- Ringback_number wikiPageWikiLink Extension_(telephone).
- Ringback_number wikiPageWikiLink Hook_Flash.
- Ringback_number wikiPageWikiLink Hook_flash.
- Ringback_number wikiPageWikiLink Illegal_drug_trade.
- Ringback_number wikiPageWikiLink Lineman_(technician).
- Ringback_number wikiPageWikiLink Loop_around.
- Ringback_number wikiPageWikiLink Narcotics_trafficking.
- Ringback_number wikiPageWikiLink North_American_Numbering_Plan.
- Ringback_number wikiPageWikiLink Party_line_(telephony).
- Ringback_number wikiPageWikiLink Payphone.
- Ringback_number wikiPageWikiLink Phone_number.
- Ringback_number wikiPageWikiLink Plant_test_number.
- Ringback_number wikiPageWikiLink Routing.
- Ringback_number wikiPageWikiLink Signal_tone.
- Ringback_number wikiPageWikiLink Technician.
- Ringback_number wikiPageWikiLink Telephone.
- Ringback_number wikiPageWikiLink Telephone_company.
- Ringback_number wikiPageWikiLink Telephone_line.
- Ringback_number wikiPageWikiLink Telephone_numbering_plan.
- Ringback_number wikiPageWikiLink Toll-free_number.
- Ringback_number wikiPageWikiLink Toll-free_telephone_number.
- Ringback_number wikiPageWikiLink United_States.
- Ringback_number wikiPageWikiLink Vertical_service_code.
- Ringback_number wikiPageWikiLinkText "Ringback number".
- Ringback_number wikiPageWikiLinkText "plant test numbers".
- Ringback_number wikiPageWikiLinkText "ringback number".
- Ringback_number wikiPageWikiLinkText "ringback".
- Ringback_number hasPhotoCollection Ringback_number.
- Ringback_number wikiPageUsesTemplate Template:Unreferenced.
- Ringback_number subject Category:Telephone_numbers.
- Ringback_number hypernym Number.
- Ringback_number type Article.
- Ringback_number type Article.
- Ringback_number type Identifier.
- Ringback_number comment "Ringback number is a number used by many telephone company linemen/technicians to test whether or not a new telephone line installation is working correctly and the phone number is routing properly.Typically a lineman tests the terminal equipment (telephone set) ringer by calling a "ringback telephone number" or ringback vertical service code and then hanging up and waiting for the phone to ring.".
- Ringback_number label "Ringback number".
- Ringback_number sameAs Postprüfplatz.
- Ringback_number sameAs m.029zrh.
- Ringback_number sameAs Q2106260.
- Ringback_number sameAs Q2106260.
- Ringback_number wasDerivedFrom Ringback_number?oldid=675151275.
- Ringback_number isPrimaryTopicOf Ringback_number.