Serving area interface: Difference between revisions
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==Alternate names== |
==Alternate names== |
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*'''Access point''' (AP) |
*'''Access point''' ('''AP''') |
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*'''Cabinet''' ( |
*'''Cabinet''' ('''cab''') |
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*'''B-box''' ( |
*'''B-box''' ('''breakout box''') |
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*'''Cross box''' |
*'''Cross box''' |
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*'''Cross-connect box''' |
*'''Cross-connect box''' |
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*'''Jumper wire interface''' (JWI) |
*'''Jumper wire interface''' ('''JWI''') |
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*'''Outside plant interface''' (OPI) |
*'''Outside plant interface''' ('''OPI''') |
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*'''Pedestal''' ( |
*'''Pedestal''' ('''ped''') |
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*'''Primary connection point''' (PCP) (UK)<ref name="Whyte">"Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997</ref> |
*'''Primary connection point''' ('''PCP''') (UK)<ref name="Whyte">"Multimedia Telecommunications" (BT Telecommunications Series), B. Whyte (Ed.), Springer 1997</ref> |
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*'''Secondary connection point''' (SCP) (UK)<ref name="Whyte"/> |
*'''Secondary connection point''' ('''SCP''') (UK)<ref name="Whyte"/> |
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*'''Telecom cabinet''' |
*'''Telecom cabinet''' |
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Revision as of 11:14, 27 April 2018
 | This article needs additional citations for verification. (April 2014) |
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 connection point (PCP) (UK)[1]
- Secondary 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.
See also
References
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