Indirect ways of assessing past temperatures, using so-called temperature proxies, take measurements of responses to past temperature change that are preserved in natural archives such as ice, rocks and fossils.
Wikipedia has an article on: Reorder tone. Wikipedia. fast busy signal â(plural fast busy signals) (telephony) An audible signal on a voice phone line that sounds more frequently than a standard busy singal, indicating that no transmission path to the called phone number is available.
Flashing Light Traffic Signals. Sometimes, you will come across a flashing red or yellow light on the road: 1  A flashing red light means come to a complete stop, then proceed when you can.  A flashing yellow light means proceed with caution.