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Busy line interrupt, also known as emergency breakthrough, is a function of telephone land line carriers in which a telephone operator, by request of a caller, interrupts an existing phone conversation between other parties. [1] This is especially useful for services without call waiting.
The SNC E-4C Survivable Airborne Operations Center (SAOC) is designed to incorporate advanced technologies that enhance its operational capabilities in various scenarios. One significant feature is its hardening against electromagnetic pulse (EMP) effects, which ensures that critical systems remain operational even after a nuclear event.
PICs typically have a common set of registers: interrupt request register (IRR), in-service register (ISR), and interrupt mask register (IMR). The IRR specifies which interrupts are pending acknowledgement, and is typically a symbolic register which can not be directly accessed.
Semi break-in is a technique used by stations where slow (T/R) antenna switches are controlled indirectly by the telegraph key which lack the faster switching of full break-in stations. Semi break-in hardware T/R switches are not required to switch as fast or to have the same long term reliability as their more expensive full break-in counterparts.
The procedure signs below are compiled from the official specification for Morse Code, ITU-R M.1677, International Morse Code, [1] while others are defined the International Radio Regulations for Mobile Maritime Service, including ITU-R M.1170, [8] ITU-R M.1172, [4] and the Maritime International Code of Signals, [5] with a few details of their ...
The use of BRK and/or COP to request an operating system service means user applications do not have to know the entry address of each operating system function, only the correct signature byte to invoke the desired operation. Hence relocation of the operating system in memory will not break compatibility with existing user applications.
Break Break: I hereby indicate the separation between messages transmitted to different aircraft in a very busy environment Cancel: Annul the previously transmitted clearance Check: Examine a system or procedure Cleared: Authorized to proceed under conditions specified. Confirm: I request verification of: (clearance, instruction, action ...
Link 4C is a fighter-to-fighter data link which is intended to complement Link 4A although the two links do not communicate directly with each other. Link 4C uses F-series messages and provides some measure of ECM resistance. Link 4C is fitted to the F-14 only and the F-14 cannot communicate on Link 4A and 4C simultaneously.