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<title>Variable-length buffer</title>
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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Variable-length buffer</span></span>
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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p>In <a href="Telecommunications" title="Telecommunications">telecommunications</a>, a <b>variable length buffer</b><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> or <b>elastic buffer</b><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> is a <a href="Buffer_(telecommunication)" class="mw-redirect" title="Buffer (telecommunication)">buffer</a> into which <a href="Data" title="Data">data</a> may be entered at one rate and removed at another rate without changing the data <a href="Sequence" title="Sequence">sequence</a>.
</p><p>Most <a href="FIFO_(computing_and_electronics)" title="FIFO (computing and electronics)">first-in first-out</a> (FIFO) <a href="Data_storage_device" class="mw-redirect" title="Data storage device"> storage devices</a> are variable-length buffers in that the input rate may be variable while the <a href="Output_(computing)" class="mw-redirect" title="Output (computing)">output</a> rate is constant or the output rate may be variable while the input rate is constant. Various clocking and control systems are used to allow control of <a href="Buffer_underflow" class="mw-redirect" title="Buffer underflow">underflow</a> or <a href="Buffer_overflow" title="Buffer overflow">overflow</a> conditions.
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<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Buffer_(telecommunication)" class="mw-redirect" title="Buffer (telecommunication)">Buffer (telecommunication)</a></li>
<li><a href="Circular_buffer" title="Circular buffer">Circular buffer</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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</style><span class="citation 1037C"><span class="noviewer" typeof="mw:File"><span></span></span> This article incorporates <a href="Copyright_status_of_works_by_the_federal_government_of_the_United_States" title="Copyright status of works by the federal government of the United States">public domain material</a> from <style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><cite class="citation cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20220122224547/https://www.its.bldrdoc.gov/fs-1037/dir-039/_5763.htm">"variable length buffer"</a>. <i><a href="Federal_Standard_1037C" title="Federal Standard 1037C">Federal Standard 1037C</a></i>. <a href="General_Services_Administration" title="General Services Administration">General Services Administration</a>. Archived from <a rel="nofollow" class="external text" href="https://www.its.bldrdoc.gov/fs-1037/dir-039/_5763.htm">the original</a> on 2022-01-22.</cite></span></span>
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