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Serving Area Concept Box and Jumper Wire Interface Box is referring to the same service box.
A cabinet that houses the feeder cable pairs (IN pair) and distribution cable pairs (OUT pair).
The Green Cover Modules (usually in the center) is the cable from the Feeder. The Blue
Cover Modules (usually on each side) is the cable to the Terminals, which will cover more in
detail in the next few sides.
Cross-connect box - XCONN box is a smaller version of the SAC/JWI box.
These cabinets are designed for easy access so the Telecom personnel can easily change the cable
route from any IN pair to any OUT pair.
You may not notice these cabinets in the field but they are usually located at the side of streets, back
alleys, inside buildings, or mounted at poles.
Figure 24: Inside of a SAC Box
For Telecommunications, these Cabinets are green and depending of your Telecom, they may
decorate them to blend in with the neighborhood.
SAC/JWI with ADSL
DSL service has become very common over the years to provide the consumer with high bandwidth.
In order to achieve these high bandwidth for consumers, DSL equipment have to be install closer to
their home.
Dial tone have to go through the DSL connections for both service to work over 1 pair.
