May 2013
Beginner
704 pages
18h 27m
English
Content preview from Focal Illustrated Dictionary of TelecommunicationsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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X
X band: In the United Kingdom, the band of frequencies from 7.0 GHz to 12.0 GHz. In the United States, the band from 5.2 GHz to 10.9 GHz. The system of nomenclature which uses letters to designate frequency bands is now obsolete.
xDSL: X Digital Subscriber Line. A method for the transmission of broadband signals over copper pair lines. The ‘x’ stands for A, H, R, S or V, depending on the technology used. See also Digital Subscriber Line (DSL).
XML: Extensible Mark-up Language.
Xmodem: A public domain File Transfer Protocol (FTP), popular with users of Personal Computers (PC). The protocol prepares groups of asynchronous characters for transmission, and appends error correction characters (checksum), calculated using one of several algorithms ...
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