Network interface device: Difference between revisions

Revision as of 12:47, 4 October 2007

Revision as of 14:29, 4 October 2007

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==Meanings of the term==

A network interface, also commonly referred to as a [[smart jack]], is typically in the basement, first floor telco room, garage, or even outside the building.{{factFact|date=October 2007}} NIUs are multi-functional devices, which include a protector block to prevent high-voltage surges from affecting premise equipment and inside wiring.{{factFact|date=October 2007}} It also usually allows the carrier to initiate a [[loop-back]] test from the central office to test the integrity of the local loop.{{factFact|date=October 2007}}

*A device that performs [[Network interface|interface]] functions, such as [[code conversion]], [[Communications protocol|protocol]] conversion, and buffering, required for [[information transfer|communications]] to and from a [[telecommunications network|network]].

*A device used primarily within a [[local area network]] (LAN) to allow a number of independent devices, with varying protocols, to communicate with each other.

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==Common practice==

The NIU belongs to the [[PSTN]] provider. Together with the [[Channel service unit |CSU]] it represents the PSTN [[demarcation point]]. The CSU is the first piece of Customer Premise Equipment (CPE). If the NIU fails the PSTN provider is responsible for repairs; if the CSU fails the customer is responsible for repairs.

==References==