In automatic direct outward telephone dialing, a digit, often a 1, or a 9, that (a) enables access to an outside facility, e.g., a PBX or local exchange, and (b) is prefixed to the specific number being dialed.
Note 1: Throughout the United States, an access digit, usually 1, must be prefixed to an area code before dialing the area… (Read More →)

In a communications system, an unsuccessful access that results in termination of an access attempt in any manner other than initiation of user information transfer between the intended source and destination (sink) within the specified maximum access time.
Note: Access failure can be the result of access denial, access outage, user blocking, or incorrect access.

A set of processes in a network that provides for interaction between the user and a network. [T1.667-1999]

The Access Gateway provides an access interface between multiple types of line side services and devices and the packet network. Examples of these services and devices are Plain Old Telephone Service (POTS) telephones, Basic Rate Interface (BRI) sets, Coin telephones, as well as some Digital Subscriber Line (DSL) and private lines/special services on 2 and 4 wire DS0, DS1 interfaces,… (Read More →)

A group of one or more stations having identical rights to use the available resources on a PBX, network or host computer.

1. In security, the level of authority required from an entity to access a protected resource.
Note: An example of access level is the authority to access information at a particular security level. [2382-pt.8]
2. [The] hierarchical portion of the security level used to identify sensitivity of information-system (IS) data and the clearance or authorization of users. Access level, in… (Read More →)

1. A transmission path between end user terminal equipment and a switching center.
2. A channel between an end user's network interface and local end office. [T1.506-1989] Synonym [loosely] loop.
3. A communications facility extending from a customer's premises to a serving central office comprising a subscriber line and, if necessary, a trunk facility, e.g., a WATS access line, TWX… (Read More →)

1. In information systems (IS), a compilation of users, programs, or processes and the access levels and types to which each is authorized. [INFOSEC-99]
2. In COMSEC, a roster of persons authorized admittance to a controlled area. [INFOSEC-99]

See attendant access loop.

In switching systems, the point where user traffic enters and exits a communications network.
Note: Access node operations may include various operations, such as protocol conversion and code conversion.