Local Access And Transport Area: Difference between revisions

Revision as of 21:46, 17 March 2025

Revision as of 21:50, 17 March 2025

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{{short description|Geographical area of the United States, used in telephone service}}

[[Image:LATAs.png|thumb|right|350px|Map of LATAs in the US]]

'''Local accessAccess andAnd transportTransport areaArea''' ('''LATA''') is a term useddefined in U.S.United States [[telecommunications]] regulation. ItA representsLATA is a geographical area of the United States under the terms of the [[Modification of Final Judgment]] (MFJ) entered by the United States District Court for the District of Columbia in Civil Action number 82-0192 or any other geographic area designated as a LATA in the [[National Exchange Carrier Association]], Inc. Tariff FCC No. 4. that precipitated the breakup of the original [[American Telephone & Telegraph|AT&T]] into the "[[Regional Bell Operating Company|Baby Bells]]" or created since that time for [[Plain old telephone service|wireline]] regulation.

Generally, a LATA represents an area within which a [[divested]] [[Regional Bell Operating Company]] (RBOC) is permitted to offer [[telephone exchange|exchange]] telecommunications and exchange access services. Under the terms of the MFJ, the RBOCs are generally prohibited from providing services that originate in one LATA and terminate in another.

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* LIR's closely follow network topology, which often does not match a local flat-rate calling area as local calling is defined by arbitrary regulatory constructs.

One exampleExample: The tiny unincorporated village of [[Beebe Plain]], divided by the [[Quebec]]-[[Vermont]] border, is served by +1-819-876 [[Rock Island, Quebec]], Canada (a remote station controlled from [[Magog, Quebec|Magog]]) and +1-802-873 [[Derby Line, Vermont]], USA (a remote station controlled from [[St. Johnsbury, Vermont|St. Johnsbury]]). Magog and St. Johnsbury are both a long-distance call from anywhere in Beebe Plain, even though Canadian subscribers can place local calls to [[Sherbrooke]], US subscribers can locally call [[Newport (city), Vermont|Newport]] and an international call within the village is local. An LIR assignment which follows network topology places the Canadian remote station in Magog's LIR, not Sherbrooke's LIR.<ref>[http://www.localcallingguide.com/lca_exch.php?exch=172360 Rock Island QC] on localcallingguide.com</ref>

==See also==

*[[Modification of Final Judgment]]

*[[Regional Bell Operating Company]]

*[[Local Exchange Routing Guide]]

*[[Telcordia]]

==Notes==

{{reflist}}