A trial carried out by nominated representatives of the eventual military users of the weapon or equipment to determine if the specified performance and characteristics have been met.

Interference at a higher level than that defined as permissible interference and which has been agreed upon between two or more administrations without prejudice to other administrations. [NTIA] [RR]

1. The ability and means necessary to store data in, to retrieve data from, to communicate with, or to make use of any resource of a system.
2. To obtain the use of a resource.
3. (COMSEC) [The] capability and opportunity to gain detailed knowledge of or to alter information or material.
4. (AIS) [The] ability and means to communicate… (Read More →)

An arrangement to transport access traffic between an end office and an IC POT (interexchange carrier point of termination) and may be either direct routed, tandem routed, or a combination of direct and tandem routed. (In the case of direct routed only, the access arrangement and access connection are synonymous. ) [T
1. Rpt 11-1991]

The process by which one or more users interact with a telecommunications system to enable initiation of user information transfer.
Note: An access attempt begins with an issuance of an access request by an access originator. An access attempt ends either in successful access or in access failure.

In a communications system, a signal sent in the backward direction to indicate that a call will not be completed because of a call-originator or a call-receiver facility requirement.
Note: An access barred signal may occur for many reasons, such as the failure of a closed user group validation check on an incoming calls-barred facility. [After Weik '96]

A class to which a user, such as a person, program, process, or equipment, of a system may be assigned, based on the resources each user is authorized to use.

A designated part of the information transfer capability having specified characteristics, provided at the user-network interface. [T1.667-1999]

1. A fee charged by a local exchange carrier for the use of its local exchange networks. [FCC]
2. A charge made by a local exchange carrier for use of its local exchange facilities for a purpose such as the origination or termination of traffic that is carried to or from a distant exchange by an interexchange carrier.

1. The preliminary digits that a user must dial to be connected to a particular outgoing trunk group or line.
2. A uniform code assigned by the telephone company to an individual customer in the form 101xxxx and 950-xxxx. [NECA/FCC-5]