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<p>P_REV=6 and beyond fall under the <a href="page.php?w=CDMA2000">CDMA2000</a> umbrella. Besides technical improvements, the IS-2000 documents are much more mature in terms of layout and content. They also provide backwards-compatibility to IS-95.</p>

<p><big>Protocol details</big></p>
<p>The IS-95 standards describe an air interface, a set of protocols used between mobile units and the network. IS-95 is widely described as a three-layer stack, where L1 corresponds to the physical (<a href="page.php?w=PHY">PHY</a>) layer, L2 refers to the <a href="page.php?w=Media_Access_Control">Media Access Control</a></p><p>
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