1. A radiocommunication service between Earth stations at given positions when one or more satellites are used; the given position may be a specified fixed point or any fixed point within specified areas; in some cases this service includes satellite-to-satellite links, which may also be effected in the inter-satellite service, the fixed-satellite service may also include feeder links for other… (Read More →)

Data compaction accomplished by storing or transmitting data only when the data fall outside prescribed limits.
Note: An example of fixed-tolerance-band compaction in a telemetering system is the transmission of the temperature only when the temperature is above or below preestablished threshold limits. Thus, the recipient of the transmission is to assume that the value is in the prescribed range… (Read More →)

In data transmission or processing, an indicator, such as a signal, symbol, character, or digit, used for identification.
Note: A flag may be a byte, word, mark, group mark, or letter that signals the occurrence of some condition or event, such as the end of a word, block, or message. Synonym field tag.

In data transmission or processing, a sequence of bits used to delimit, i. e. mark, the beginning and end of a frame.
Note 1: An 8-bit sequence is usually used as the flag sequence; for example, the 8-bit flag sequence
0111111
0.
Note 2: Flag sequences are used in bit-oriented protocols, such as Advanced Data Communication Control Procedures (ADCCP), Synchronous… (Read More →)

To send nasty or insulting messages, usually in response to someone's having broken the rules of Internet etiquette (called netiquette).

1. A signal generated by the momentary depression of the telephone switchhook or other device.
Note: A flash may be used to request additional services.
2. An on-hook signal of a defined duration, used to activate network features. [T1.401-1988]

In computer-based equipment (such as MP3 players, digital cameras, and palm-held computers), a type of memory storage device approximately the size of a matchbook, capable of recording several megabytes of (usually compressed) digitized audio files or data files. Synonym flash memory card.

A supplementary calling feature provided by the near-end customer interface (CI) that is activated or controlled through the use of one or more flash signals. [T1.407-1997]

Synonym flash card.

A category of precedence reserved for initial enemy contact messages or operational combat messages of extreme urgency. Brevity is mandatory. [JP 1-02]