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.
Lee Sanchez, I'm a Truecaller Brand Ambassador. Views. If you're calling the same number and always gives you a busy tone, the person you're calling is either blocked your number or forwarded your call to a busy line. You can tell if your call is blocked by someone by listening and timing. A very short and sometimes unheared ring followed by a busy tone means that person has blocked your number.