TAILIEUCHUNG - Fiber Optics Illustrated Dictionary - Part 47

The Fiber Optics Illustrated Dictionary - Part 47 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary and status lights on the front panel. The Kitchen Computer was technically known as the H-316 Pedestal Model. Series-16 rack- and table-top models were available as well. Despite its spectacular lack of success in the kitchen market the Series-16 technology was not completely lost as it eventually made its way into components used in the ARPANET as interface message processors for connecting hosts a more suitable market for cutting-edge pioneer computing technologies. See Altair PCP series computers. hook switch switch hook The hook switch was originally designed not just to terminate a connection so the next call could come through but served also to disconnect from a battery source so it wouldn t be quickly used up and later an electrical source. Modem telephones draw current from the line and don t require a separate battery to operate the basic calling and receiving functions but the hook switch the hook on the side of an old traditional box phone or the buttons plungers on top of a traditional rotary desk phone are still used for disconnecting a call and sometimes for generating a tone if they are held down briefly which doesn t cause immediate disconnection . See hooking signal. hook switch dialing On older wall box phones and rotary pulse phones it was possible to dial a number by depressing the hook carefully for each number you wanted to dial. Depressing the hook switch for too long would disconnect the line. This is even possible on some of the older pay phones. See hook switch hookflash A signal-sending mechanism whereby the hook on an old-style phone or button plunger on a newer phone is quickly depressed to signal the initiation of a service or operation. hoot n holler holier down shout down squawk box A dedicated four-wire open phone circuit connecting speakers or speakerphones at each end of the connection round the clock. It s like a 24-hour public address system using phone lines with full duplex two-way .

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