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===Tollfree numbers=== |
===Tollfree numbers=== |
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Some telecommunication carriers maintain [[toll-free number]]s for ANAC facilities. Some national toll-free numbers provide [[automatic number identification|ANI]] by reading back the telephone number of the caller, but these are not intended for use in identifying the customer's own phone number. They are used for the agent in a [[call center]] to confirm the telephone a customer is calling from, so that the customer's account information can be displayed as a "[[screen pop]]" for the next available [[customer service]] representative. |
Some telecommunication carriers maintain [[toll-free number]]s for ANAC facilities. Some national toll-free numbers provide [[automatic number identification|ANI]] by reading back the telephone number of the caller, but these are not intended for use in identifying the customer's own phone number. They are used for the agent in a [[call center]] to confirm the telephone a customer is calling from, so that the customer's account information can be displayed as a "[[screen pop]]" for the next available [[customer service]] representative. |
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===Australia=== |
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*1800 801 920 |
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*127 22 123 (Telstra landlines only) |
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=== Canada === |
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The current use of exchange prefixes for each area code is listed by CNAC;<ref>{{cite web|url=http://cnac.ca/co_codes/co_code_status.htm |publisher=Canadian Numbering Administrator|title=CO codes (list of all exchanges in each area code, including test and reserved prefixes)}}</ref> if an exchange changes from "plant test" to reclaimed or active, any former test numbers with the associated prefix are invalidated. Commonly-used test numbers for major carriers (dialled with any of the local area codes, as 10 digits) include: |
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* 555-0311 [[Rogers Communications|Rogers]] (403 Alberta, 519 613 Ontario) |
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* 958-1115 [[SaskTel]] (306 Saskatchewan) |
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* 958-2222 [[Eastlink (company)|Eastlink]] |
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* 958-2580 [[Bell Canada]] (519 613 416 705 905 Ontario, 450 418 438 514 579 581 819 873 Quebec) |
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* 958-6111 [[Telus]] landline (403 780 Alberta, 250 BC) |
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* 958-9999 [[Bell Aliant]] (506 NB, 709 NL) |
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* 959-4444 [[Manitoba Telecom Services]] (204 MB) (959 is used since 958 is a regular Winnipeg exchange, not a test prefix) |
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===Ireland=== |
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*19 9000 announces the line number on all [[Eir (telecommunications)|Eir]] lines, including lines where calls are carried by another provider using [[carrier preselect]] and lines provided by [[local-loop unbundling]]. The number is called out without the leading 0. For example, 021 XXX XXXX is read back as "21 XXX XXXX". |
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===Israel=== |
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* <nowiki>*110</nowiki> (Not working in all networks) |
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===New Zealand=== |
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* 1956 or 0 (8) 320-1231 area code and number |
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* 1957 or 0 (8) 320-1234 local number |
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===United Kingdom=== |
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*17070, Openreach Linetest Facilities |
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*020 8759 9036, same recording as 17070 but useful on LLU and cable lines where 17070's functionality is limited. Not usable on mobiles. |
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=== United States of America === |
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Test prefixes will normally be listed as UA (unassignable) on [[NANPA]].com's list of local exchange codes. |
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A few examples of statewide or system-wide 958 or 959 ANAC numbers for major US incumbent landline carriers include: |
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* 958, as a three-digit number in many former [[NYNEX]]/Bell Atlantic areas, now Verizon or [[FairPoint Communications|FairPoint]] (207 Maine, 212 New York, 215 Pennsylvania, 315 New York, 413 Massachusetts, 508 Massachusetts, 516 New York, 603 New Hampshire, 609 New Jersey, 610 Pennsylvania, 617 Massachusetts, 718 New York, 732 New Jersey, 856 New Jersey, 958 New Jersey) |
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* 959-1114 [[Verizon Communications|Verizon]], for all former [[GTE]] points in California (area codes 310, 714, 760, 805); also Southwestern Virginia (276), Farmersburg/North Terre Haute/South Terre Haute/Riley Indiana (812) and Durham, North Carolina (919) |
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* 959-1122 [[Pacific Bell|PacBell]] ([[AT&T]]), all points (California area codes 209, 213, 310, 408, 415, 510, 530, 619, 650, 714, 760, 805, 831, 909, 916 and 925) |
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* 959-1122 [[Southwestern Bell]] (AT&T), (417 Missouri, 620 Kansas, 816 Missouri, 913 Kansas, 817 Texas, 972 Texas and 682 Texas) |
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* 959-3111 [[CenturyLink]] All circuits |
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==See also== |
==See also== |
Revision as of 16:59, 5 November 2022
An automatic number announcement circuit (ANAC) is a component of a central office of a telephone company that provides a service to installation and service technicians to determine the telephone number of a telephone line. The facility has a telephone number that may be called to listen to an automatic announcement that includes the caller's telephone number. The ANAC facility is useful primarily during the installation of landline telephones to quickly identify one of multiple wire pairs in a bundle or at a termination point.
Operation
By connecting a test telephone set, a technician calls the local telephone number of the automatic number announcement service. This call is connected to equipment at the central office that uses automatic equipment to announce the telephone number of the line calling in. The main purpose of this system is to allow telephone company technicians to identify the telephone line they are connected to.
Automatic number announcement systems are based on automatic number identification. They are intended for use by phone company technicians, the ANAC system bypasses customer features, such as unlisted numbers, caller ID blocking, and outgoing call blocking. Installers of multi-line business services where outgoing calls from all lines display the company's main number on call display can use ANAC to identify a specific line in the system, even if CID displays every line as "line one".
Most ANAC systems are provider-specific in each wire center. while others are regional or state-/province- or area-code-wide. No official lists of ANAC numbers are published, as telephone companies guard against abuse that would interfere with availability for installers.[1]
Exchange prefixes for testing
Under the North American Numbering Plan, the central office prefixes 958 and 959 are reserved for plant testing in most area codes. Telephone numbers within this block are used for various test utilities such as a ringback number (to test the ringer when installing telephone sets), milliwatt tone (a number simply answers with a continuous test tone) and a loop around (which connects a call to another inbound call to the same or another test number). ANAC services are also installed in the 958 range. In some area codes, multiple additional prefixes are reserved for test purposes. Many area codes reserved 999; 320 was also formerly reserved in Bell Canada territory. As widespread inefficiencies in numbering (such as the assignment of entire blocks of 10000 numbers to every competing carrier in every small village to support local number portability schemes) have created shortages of available numbers, these prefixes are often "reclaimed" and issued as standard exchanges, moving the handful of numbers in them to one standard test exchange (usually 958).
Other carrier-specific North American test numbers include 555-XXXX numbers (such as 555-0311 on Rogers Communications in Canada) or vertical service codes (such as *99 on Cablevision/Optimum Voice in the US). These assignments are less common.
Some carriers disable payphone calls to 958 or 959 test lines, such as Bell Canada's system-wide ANAC line at (area code) 958-2580. Conversely, a standard line on which voice service has been unsubscribed (such as an ADSL dry loop) may still accept calls to the 958 test exchange but not allow calls to standard numbers. This "soft disconnect" condition is intended to allow calls to 9-1-1 emergency services and to the telco business office to order telephone service, but to no other numbers.
Telephone numbers
Plant testing telephone numbers are carrier-specific, there is no comprehensive list of telephone numbers for ANAC services. In some communities, test numbers change relatively often. In others, a major incumbent carrier will assign a single number which provides test functions on its network across an entire area code, throughout an entire province or state, or system-wide.
Tollfree numbers
Some telecommunication carriers maintain toll-free numbers for ANAC facilities. Some national toll-free numbers provide ANI by reading back the telephone number of the caller, but these are not intended for use in identifying the customer's own phone number. They are used for the agent in a call center to confirm the telephone a customer is calling from, so that the customer's account information can be displayed as a "screen pop" for the next available customer service representative.