Serving area interface
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) Secondary cross-connection point (SCP) (UK) 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).