Foreign Area Translator: Difference between revisions
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[[File:Blr-fat.png|thumb|A map showing a theoretical central office area where a foreign area translator would be useful.]] | [[File:Blr-fat.png|thumb|A map showing a theoretical central office area where a foreign area translator would be useful.]] | ||
A '''foreign area translator (FAT)''' is a type of [[translator]] that handles area codes in a 5XB [[completing marker]]. In 5XB offices for which all foreign area (long distance) traffic is sent to a tandem or toll switch for completion, there is usually no need for a FAT, because all calls out of the local dialing area can indiscriminately be sent onward for completion over a single route. However, in 5XB offices that are near an area code boundary, there may be ''direct'' trunks to a nearby office, even if it is technically in an entirely different area code. Thus, routing that traffic off to a long distance switch may not be the best or most direct choice. Foreign Area Translators allow 5XB switches to choose with greater discrimination on routes to nearby switches in other area codes. | A '''foreign area translator (FAT)''' is a type of [[translator]] that handles [[wikipedia:Telephone_numbering_plan#Area_code|area codes]] in a 5XB [[completing marker]]. In 5XB offices for which all foreign area (long distance) traffic is sent to a [[Tandem switch|tandem]] or [[Number 4 Crossbar|toll switch]] for completion, there is usually no need for a FAT, because all calls out of the local dialing area can indiscriminately be sent onward for completion over a single route. However, in 5XB offices that are near an area code boundary, there may be ''direct'' [[Trunk|trunks]] to a nearby office, even if it is technically in an entirely different area code. Thus, routing that traffic off to a long distance switch may not be the best or most direct choice. Foreign Area Translators allow 5XB switches to choose with greater discrimination on routes to nearby switches in other area codes. | ||
== External Links == | == External Links == | ||
* https://telecomarchive.s3.us-east-2.amazonaws.com/docs/bsp-archive/BLR/33-2.pdf | * https://telecomarchive.s3.us-east-2.amazonaws.com/docs/bsp-archive/BLR/33-2.pdf | ||
Latest revision as of 21:21, 20 February 2025
A foreign area translator (FAT) is a type of translator that handles area codes in a 5XB completing marker. In 5XB offices for which all foreign area (long distance) traffic is sent to a tandem or toll switch for completion, there is usually no need for a FAT, because all calls out of the local dialing area can indiscriminately be sent onward for completion over a single route. However, in 5XB offices that are near an area code boundary, there may be direct trunks to a nearby office, even if it is technically in an entirely different area code. Thus, routing that traffic off to a long distance switch may not be the best or most direct choice. Foreign Area Translators allow 5XB switches to choose with greater discrimination on routes to nearby switches in other area codes.