电信专业英英词典N-1（在线收听）

　　NBEC

　　non-Bell exchange carrier

　　NCP

　　network control point

　　NCTE

　　network channel terminating equipment

　　Network Control Point (NCP)

　　In virtual private networks, the Network Contol Point is a centralized database that stores a subscriber's unique VPN definition. Highly sophisticated, this database screens every call and applies call processing control in accordance with customer-defined requirements.

　　Network Operating System (NOS)

　　NOS is software that controls the execution of network programs and modules. Structurally, networking software comprises multiple modules, most residing in network servers, but some must be installed in each terminal/station that can access network resources. Peer-to-peer NOSs permit any terminal/station to act as a resource server or a client, and can be based on Microsoft's Disk operating system (MS DOS) designed for IBM and compatible PCs. Since MS DOS is not designed to run multiple programs and respond to many simultaneous users, most NOSs designed for large networks with dedicated servers/superservers, have a multitasking and multi- user architecture. Advanced NOS products support network management, diagnostics, and administration, as well as, primary server, client, de vice and external network driver functions.

　　Network Services

　　Network Services are specified sets of information transfer capabilities furnished to users between telecommunications network points of termination. Network services categories include access and transport, public and private, and switched and non-switched.

　　NIC

　　network interface card

　　NIST

　　National Institute of Standards and Technology

　　NI

　　network interface

　　NNX

　　Before the use of "1" in direct distance dialing, NNX indicated the first three numbers of a North American local telephone number. These numbers are now designated as NXX, allowing local central offices to have numbers that look like area codes.