Difference between RPhone and XPhone?

Version 1
    This document was generated from CDN thread

    Created by: Matt Bolton on 24-07-2012 10:07:41 PM
    1.Does anybody know what is the defference between RPhone and XPhone , or RLine and XLine ?
    2.i can obtain phone information via RisPort.selectCmDevice , and can also get it via the AXL getPhone , what is the difference between them?