Abbreviation for network busy hour. See busy hour.

Abbreviation for narrowband radio voice frequency.

A call disposition category for a call attempt that does not find an available outgoing trunk. [T1.209-1998]

Abbreviation for National Coordinating Center for Telecommunications.

Abbreviation for network channel interface code. An encoded representation used to identify 5 interface elements located at a point of termination (POT) at central office or customer location. The interface elements are: total conductors, protocol, impedance, protocol options, and transmission level points. [T1.223-1991]

1. National Communications System,
2. net control station.

See Network Channel Code

(NC is a registered trademark of iconectiv, LLC. )

A condition of an interface, as determined by the network, based on the network's capability to terminate another call to that interface. The interface is said to be NDUB if any of the following conditions exist: (a) if the maximum number of information channels available has been reached and the network does not support the offering of additional calls beyond… (Read More →)

Network Element

Network Element to Operations System