Serving area interface: Difference between revisions

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The serving area interface or service area interface (SAI) is an outdoor enclosure or metal box that allows access to telecommunications wiring.

Alternate names

Access point (AP)
Cabinet (cab)
B-box (breakout box)
Cross box
Cross-connect box
Jumper wire interface (JWI)
Outside plant interface (OPI)
Pedestal (ped)
Primary cross-connection point (PCP) (UK)^[1]
Secondary cross-connection point (SCP) (UK)^[1]
Telecom cabinet

Function

The SAI provides the termination of individual twisted pairs of a telephony local loop for onward connection back to the nearest telephone exchange (US: "central office" (CO)) or remote switch, or first to transmission equipment such as a subscriber loop carrier multiplexer and then to the exchange main distribution frame (MDF).

In the United Kingdom, the components from the PCP onwards to the customer are known as "D-side" (distribution side), and from the PCP back to the MDF as the "E-side" (exchange side). In the United States, the connection back to the MDF is known as the F2 (secondary distribution cable) and/or the F1 (main feeder cable) pairs.

SAIs 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.

References

^ ^a ^b "Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997

This article related to telecommunications is a stub. You can help Wikipedia by expanding it.

[Whyte-1] "Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997

[1]

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 {{refimprove|date=April 2014}}
 [[File:VZ SAI workers Secaucus jeh.JPG|thumb|SAI in New Jersey]]
-The '''Serving Area Interface''' or '''Service Area Interface''' ('''SAI''') is an outdoor [[Enclosure (electrical)|enclosure]] or metal box that allows access to telecommunications wiring.
+The '''serving area interface''' or '''service area interface''' ('''SAI''') is an outdoor [[Enclosure (electrical)|enclosure]] or metal box that allows access to telecommunications wiring.
-==Alternate Names==
+==Alternate names==
-*'''Access Point''' (AP)
+*'''Access point''' ('''AP''')
-*'''Cabinet''' (Cab)
+*'''Cabinet''' ('''cab''')
-*'''B-box'''
+*'''B-box''' ('''breakout box''')
 *'''Cross box'''
 *'''Cross-connect box'''
-*'''Pedestal''' (Ped)
+*'''Jumper wire interface''' ('''JWI''')
+*'''Outside plant interface''' ('''OPI''')
-*'''Primary Connection Point''' (PCP) (UK)<ref>"Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997</ref>
+*'''Pedestal''' ('''ped''')
-*'''Secondary Connection Point''' (SCP) (UK)<ref>"Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997</ref>
+*'''Primary cross-connection point''' ('''PCP''') (UK)<ref name="Whyte">"Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997</ref>
-*'''Telecom Cabinet'''
+*'''Secondary cross-connection point''' ('''SCP''') (UK)<ref name="Whyte"/>
+*'''Telecom cabinet'''
 == Function ==
-The SAI provides the [[Point of appearance|termination]] of individual [[twisted pair]]s of a telephony [[local loop]] for onward connection back to the nearest [[telephone exchange]] (US: "[[telephone exchange|central office]]" (CO)) or remote switch, or first to transmission equipment such as a [[Subscriber Loop Carrier]] multiplexer and then to the exchange [[Main Distribution Frame]] (MDF).
+The SAI provides the [[point of appearance|termination]] of individual [[twisted pair]]s of a telephony [[local loop]] for onward connection back to the nearest [[telephone exchange]] (US: "[[telephone exchange|central office]]" (CO)) or remote switch, or first to transmission equipment such as a [[subscriber loop carrier]] multiplexer and then to the exchange [[main distribution frame]] (MDF).
-In the [[United Kingdom]], the components from the PCP onwards to the customer are known as "[[D-side (UK telephone cabling)|D-side]]" (Distribution Side), and from the PCP back to the [[Main distribution frame|MDF]] as the "E-side" (Exchange Side).  In the [[United States]], the connection back to the [[Main distribution frame|MDF]] is known as the F2 (Secondary Distribution Cable) and/or the F1 (Main Feeder Cable) pairs.
+In the United Kingdom, the components from the PCP onwards to the customer are known as "[[D-side (UK telephone cabling)|D-side]]" (distribution side), and from the PCP back to the MDF as the "E-side" (exchange side).  In the United States, the connection back to the MDF is known as the F2 (secondary distribution cable) and/or the F1 (main feeder cable) pairs.
-SAIs 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.
+SAIs are used in suburban 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.
-==References==
-{{Reflist}}
 ==See also==
+*[[Demarcation point]]
-{{Commons category|Serving area interface}}
 *[[Enclosure (electrical)]]
 *[[Fiber to the telecom enclosure]]
 *[[Sub-loop unbundling]]
-*[[Demarcation point]]
+==References==
+{{Commons category|Serving area interface}}
+{{Reflist}}
 [[Category:Local loop]]