This document specifies the CXPI data link layer and the CXPI physical layer.The DLL is based on:– priority-based CXPI network access;– non-destructive content-based arbitration;– broadcast frame transfer and acceptance filtering; and– node related error detection and error signalling.The CXPI physical layer (PHY) requirements comprise of:– physical signalling (PS) sub-layer, which specifies the requirements of the clock generation function, the encoding and decoding of CXPI frames, and bit-wise collision resolution logic;– physical media attachment (PMA) sub-layer, which specifies the requirements of the signal shaping waveform logic;– physical media dependent (PMD) sub-layer, which specifies the requirements of the CXPI network termination, electrostatic discharge protection, etc., and device connector requirements; and– physical media (PM), which specifies the requirements of the CXPI network cable/wiring harness.