A communications channel allocated to the user for input of information such as data communication for use in maintenance activities and removing of alarms external to the span equipment in a proprietary fashion. [After T1.105-1988]

In the Internet Protocol suite, a standard, low-overhead, connectionless, host-to-host protocol that is used over packet-switched computer communications networks, and that allows an application program on one computer to send a datagram to an application program on another computer.
Note: The main difference between UDP and TCP is that UDP provides connectionless service, whereas TCP does not.

1. A character string or pattern that is used by a data processing system to identify a user. [2382-pt.8]
2. [A] unique symbol or character string used by an information system (IS) to identify a specific user. [INFOSEC-99] Synonym user identification.

1. A character string which uniquely identifies a user to a system [CESG]. See also: Password.
2. See user ID.

A standard device or functionality providing secure procedures in support of registration, authentication, and privacy for wireless access to PCS, and which may also be used to facilitate other services (e.g., UPT, banking). [After T
1. Rpt44-1995]

Information transferred across the functional interface between a source user and a telecommunications system for delivery to a destination user.
Note: In telecommunications systems, user information includes user overhead information.

A bit transferred from a source user to a telecommunications system for delivery to a destination user.
Note 1: User information bits do not include the overhead bits originated by, or having their primary functional effect within, the telecommunications system.
Note 2: User information bits are encoded to form channel bits.

A block that contains at least one user information bit.

The convergence of a full range of user interface types, including fixed terminals, mobile handsets or other user devices and interfaces.

Synonym loop.