Serving area interface: Difference between revisions
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The '''serving area interface''' or '''service area interface''' ('''SAI''') often called '''B-box''', '''cross-connect box''', '''cross box''', or '''access point''' (AP) is an outdoor [[telecommunications]] [[cabinet]] usually mounted on the ground on cable [[easement|right-of-way]]s, but sometimes also on [[telephone pole]]s. It is here that the individual [[twisted pair]]s of a telephone [[local loop]] are [[Point of appearance|terminated]]. SAI are often recognizable as ubiquitous gray-green cabinets seen next to [[street]]s. Here the individual twisted pair wires interface with F2 ( or Secondary Feeder Cable ) pairs and connect with F1 ( or Main Feeder Cable ) pairs at this point. F1 cables then go underground in conduit or along poles, usually to the nearest [[central office]] (CO) or remote switch, or first to transmission equipment like a multiplexer and then to the CO. |
The '''serving area interface''' or '''service area interface''' ('''SAI''') often called '''B-box''', '''cross-connect box''', '''cross box''', or '''access point''' (AP) is an outdoor [[telecommunications]] [[cabinet]] usually mounted on the ground on cable [[easement|right-of-way]]s, but sometimes also on [[telephone pole]]s. It is here that the individual [[twisted pair]]s of a telephone [[local loop]] are [[Point of appearance|terminated]]. SAI are often recognizable as ubiquitous gray-green cabinets seen next to [[street]]s. Here the individual twisted pair wires interface with F2 ( or Secondary Feeder Cable ) pairs and connect with F1 ( or Main Feeder Cable ) pairs at this point. F1 cables then go underground in conduit or along poles, usually to the nearest [[central office]] (CO) or remote switch, or first to transmission equipment like a multiplexer and then to the CO. |
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SAI are used in |
SAI are used in [[suburb]]an and low density urban areas, serving some of the same purposes that [[Maintenance hole|manhole]]s do in high density urban areas. Besides a cross connect point, they sometimes contain a [[DSLAM]] or more rarely a [[remote concentrator]] or both. |
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==See also== |
==See also== |
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*[[Enclosure (electrical)]] |
*[[Enclosure (electrical)]] |
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*[[Fiber to the Telecom Enclosure]] |
*[[Fiber to the Telecom Enclosure]] |
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*[[Sub-loop unbundling]] |
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[[Category:Telephony]] |
[[Category:Telephony]] |
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Revision as of 13:47, 4 August 2007
The serving area interface or service area interface (SAI) often called B-box, cross-connect box, cross box, or access point (AP) is an outdoor telecommunications cabinet usually mounted on the ground on cable right-of-ways, but sometimes also on telephone poles. It is here that the individual twisted pairs of a telephone local loop are terminated. SAI are often recognizable as ubiquitous gray-green cabinets seen next to streets. Here the individual twisted pair wires interface with F2 ( or Secondary Feeder Cable ) pairs and connect with F1 ( or Main Feeder Cable ) pairs at this point. F1 cables then go underground in conduit or along poles, usually to the nearest central office (CO) or remote switch, or first to transmission equipment like a multiplexer and then to the CO.
SAI are used in suburban and low density urban areas, serving some of the same purposes that manholes do in high density urban areas. Besides a cross connect point, they sometimes contain a DSLAM or more rarely a remote concentrator or both.