- 行业: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
1. A subscriber-owned telecommunications exchange that usually includes access to the public switched network. 2. A switch that serves a selected group of users and that is subordinate to a switch at a higher level military establishment. 3. A private telephone switchboard that provides on-premises dial service and may provide connections to local and trunked communications networks. Note 1: A PBX operates with only a manual switchboard; a private automatic exchange (PAX) does not have a switchboard, a private automatic branch exchange (PABX) may or may not have a switchboard. Note 2: Use of the term "PBX" is far more common than "PABX," regardless of automation.
Industry:Telecommunications
1. A subcarrier that serves as a control signal for use in the reception of FM stereophonic sound broadcasts. 2. A subcarrier used in the reception of TV stereophonic aural or other subchannel broadcasts.
Industry:Telecommunications
1. A station capable of being carried by one or more persons. Note: A portable station usually has a self-contained power source and can be operated while being carried. 2. A station designed to be carried by a person and capable of transmitting and/or receiving while in motion or during brief halts at unspecified locations.
Industry:Telecommunications
1. A statement of intent to counter specified threats and/or satisfy specified organizational security policies or assumptions. 2. The contribution to security which a Target of Evaluation is intended to achieve.
Industry:Telecommunications
1. A standardized, MIME-compliant method of encoding e-mail and other electronically transferred messages to provide a minimum level of security through encryption. 2. The name of a program for conveying binary data as a character string over a character-only channel.
Industry:Telecommunications
1. A specified period of time, during which bits are transferred from a source to a destination, where 30% of the blocks received are errored, or at least one severely disturbed period occurred. A severely disturbed period occurs when, over a period of time equivalent to four contiguous blocks or 1 ms, whichever is larger, all the contiguous blocks are affected by a high bit error density of 10-2. This definition applies for a specified block size. Note: Where a suitable block is not available, an alternate definition (#2 below) can be used. 2. A specified period of time, during which bits are transferred from a source to a destination, where a bit error ratio worse than 10-3 occurs.
Industry:Telecommunications
1. A special user who can perform control of processes, devices, networks, and file systems. 2. An informal name for root.
Industry:Telecommunications
1. A signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes. Note: Sometimes it is necessary to employ several independent pilot frequencies. Most radio relay systems use radio or continuity pilots of their own but transmit also the pilot frequencies belonging to the carrier frequency multiplex system. 2. See palm-top.
Industry:Telecommunications
1. A Short name referring to investigation, study, and control of compromising emanations from information systems (IS) equipment. 2. To shield against compromising emanations. 3. The unintentional radiation or conduction of compromising emanations from communications, non-communications and/or computer systems. See also: Radiation Security. 4. The study and control of spurious electronic signals emitted from ADP equipment. TEMPEST is a standard for electromagnetic shielding for computer and communications equipment. It was created in response to the fact that information may be read from radiation from such devices at a distance.
Industry:Telecommunications
1. A housing, screen, sheath, or cover that substantially reduces the coupling of electric, magnetic, or electromagnetic fields into or out of circuits or transmission lines. 2. A protective cover that prevents the accidental contact of objects or persons with parts or components operating at hazardous voltage levels.
Industry:Telecommunications
