A virtual circuit used to establish a long-term connection between data terminal equipments (DTE).
Note 1: In a PVC, the long-term association is identical to the data transfer phase of a virtual call.
Note 2: Permanent virtual circuits eliminate the need for repeated call set-up and clearing. Deprecated synonym nailed-up circuit.

Observed or predicted interference which complies with quantitative interference and sharing criteria contained in these [Radio] Regulations or in CCIR Recommendations or in special agreements as provided for in these Regulations. [NTIA] [RR]

[A] device used in crypto-equipment to change the order in which the contents of a shift register are used in various nonlinear combining circuits. [INFOSEC-99]

A state in which data retains its original meaning as long as the system configuration remains unchanged, even across system reboots. However, any change to the system configuration (such as adding or deleting user IDs, and modifying the set of valid sensitivity labels) may render data non-persistent [POSIX.6].

Information that endures beyond a single instance of use, e.g., longer than one call attempt. [T1.667-1999]

Synonym droid. See bot.

Information such as a secret password, a badge, or biometric data—or any combination of these—used to authenticate a user's identity. [After X9.26]

See PCS.

A set of capabilities that allows some combination of terminal mobility, personal mobility, and service profile management.
Note 1: The flexibility offered by PCS can supplement existing telecommunications services, such as cellular radio, used for NS/EP missions.
Note 2: PCS and UPT are sometimes mistakenly assumed to be the same service concept. UPT allows complete personal mobility across multiple networks… (Read More →)

The process by which end users cancel a previous registration to a terminal. [T1.702-1995] [T
1. Rpt34-1994]