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Clearing, in telecommunications means: A sequence of events used to disconnect a telephone call and return to the ready state for the next call setup . It is sometimes, particularly in the context of common-channel signaling , called teardown .
Release (REL) — Sent to clear the call when a subscriber goes on hook. This is also sent (in direct response to an IAM) if the terminating switch determines that the call cannot be completed. In either case, the terminating switch provides a cause value in the message to explain the reason for the release, e.g. , "User busy".
The Federal Aviation Administration insists flying is still extremely safe and improvements are being made even as near miss numbers rise.
The moves come after a string of close calls at airports around the country. Federal investigators have begun looking into seven such incidents since January, and those are only the most serious ones.
One NFL Network host called the officiating brutal at one point during the Chiefs’ loss to the Packers.
In the United States, the Aviation Safety Reporting System (ASRS) has been collecting confidential voluntary reports of close calls from pilots, flight attendants, air traffic controllers since 1976. The system was established after TWA Flight 514 crashed on approach to Dulles International Airport near Washington, D.C., killing all 85 ...
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A nuclear close call is an incident that might have led to at least one unintended nuclear detonation or explosion, but did not. These incidents typically involve a perceived imminent threat to a nuclear-armed country which could lead to retaliatory strikes against the perceived aggressor.