Network interface device

（重定向自Network interface unit）

Two simple NIDs, carrying six lines each, on the outside of a building

A German copper phone line termination box called Abschlusspunkt LinienTechnik (APL,

Three smartjacks for T-1 circuits, in two shelves; a 66 block is on the left

An optical network terminal mounted to the outside of a building, with the cover open

In telecommunications, a network interface device (NID) is a device that serves as the demarcation point between the carrier's local loop and the customer's premises wiring. Outdoor telephone NIDs also provide the subscriber with access to the station wiring and serve as a convenient test point for verification of loop integrity and of the subscriber’s inside wiring.

单词	Network interface unit
释义	Network interface unit 英语百科 Network interface device （重定向自Network interface unit） In telecommunications, a network interface device (NID) is a device that serves as the demarcation point between the carrier's local loop and the customer's premises wiring. Outdoor telephone NIDs also provide the subscriber with access to the station wiring and serve as a convenient test point for verification of loop integrity and of the subscriber’s inside wiring.
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