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Chart of the Morse code 26 letters and 10 numerals [1]. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur [2]. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.
A pager, also known as a beeper or bleeper, [1] is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter.
On 17 and 18 September 2024, thousands of handheld pagers and hundreds of walkie-talkies intended for use by Hezbollah exploded simultaneously in two separate events across Lebanon and Syria, in an Israeli attack nicknamed Operation Grim Beeper. [9]
Download QR code; Print/export Download as PDF; Printable version; In other projects ... A beeper is a device that makes a beep sound. Beeper may also refer to: Devices
[17] [16] [10] Beep lines proved infectiously popular in the 1960s and 1970s; for example, New England Telephone in 1963 reporting a sharp uptick in busy signal calls in one week (from 1,495 to 27,928) after a beep line number was published in a teen weekly, according to Time magazine. [10]
A program in Karel is used to control a simple robot named Karel that lives in an environment consisting of a grid of streets (left-right) and avenues (up-down). Karel understands five basic instructions: move (Karel moves by one square in the direction he is facing), turnLeft (Karel turns 90 ° left), putBeeper (Karel puts a beeper on the square he is standing at), pickBeeper (Karel lifts a ...
Therefore, those transmissions would consist of a "beep" (PTT press) followed by Houston talking, then another "beep" (PTT release) and finally the voice of the astronauts. Another misconception about Quindar tones is that they were designed to signal the end of a transmission, similar to a courtesy tone used on many half-duplex radio repeaters .
The tap code, sometimes called the knock code, is a way to encode text messages on a letter-by-letter basis in a very simple way. The message is transmitted using a series of tap sounds, hence its name. [1] The tap code has been commonly used by prisoners to communicate with each other.