1 Scope
2 References
  2.1 Applicable Publications
       2.1.1 SAE Publications
  2.2 Related Publications
       2.2.1 SAE Publications
       2.2.2 ISO Publications
3 Definitions
  3.1 AHdr (Application Header)
  3.2 ALP (Application Layer Primitives)
  3.3 AMI-C (Automotive Multimedia Interface Collaboration
  3.4 APDU (Application Protocol Data Unit)
  3.5 Audio Arbiter
  3.6 Audio Bus
  3.7 Audio Bus Capability
  3.8 Audio Bus Device
  3.9 Byte
  3.10 CEA (Consumer Electronics Association)
  3.11 Clear
  3.12 ID
  3.13 ITS
  3.14 Logical Node
  3.15 MC (Message Code)
  3.16 Mute
  3.17 Octet
  3.18 OEM (Original Equipment Manufacturer)
  3.19 OSI
  3.20 Output Level
  3.21 Physical Node
  3.22 PMODE (Power Mode Line)
  3.23 Primitives
  3.24 Receiver
  3.25 SAPID (Service Access Point Identifier)
  3.26 Set
  3.27 Transmitter
4 Protocol Overview
  4.1 Basic Concepts
       4.1.1 SAPID for Message Interpretation
       4.1.2 SAPID for Service Announcement
       4.1.3 Physical Nodes and Logical Nodes
       4.1.4 Physical Nodes IDs and Logical Nodes IDs
       4.1.5 Logical Node Status
  4.2 Application Layer Primitives
       4.2.1 Send Application Message
       4.2.2 Receive Application Message
       4.2.3 Change Status Request
       4.2.4 Get Status Information
  4.3 Application Common Header Elements
       4.3.1 Control
       4.3.2 SAPID
       4.3.3 Address
       4.3.4 Sequence
       4.3.5 MsgLen (MSB)
  4.4 Application Message Layer SAPIDs
       4.4.1 Application SAPIDs
       4.4.2 Standard APDU Encoding Rules
       4.4.3 Encapsulated Protocols
5 Standard Messages Supported by All Logical Nodes
  5.1 APLNewStatus and APLReqStatus
  5.2 APLReqLogicalNodeInfo and APLDevInfo
  5.3 APLReqMaxMsgLen and APLMaxMsgLen
  5.4 APLPing and APLPingReply
  5.5 APLDiag and APLDiagReply
  5.6 APLResults
6 Audio Arbitration
  6.1 Introduction
  6.2 Audio Bus Messages SAPID
  6.3 Responsibilities
       6.3.1 Audio Arbiter
       6.3.2 Transmitter
       6.3.3 Receiver
  6.4 Audio Arbitration Sequences
       6.4.1 Audio Arbiter Identification
       6.4.2 Transmitter Activation
  6.5 Audio Bus Messages
       6.5.1 ABCapabilityReq and ABCapabilityReply
       6.5.2 ABTransmitRequest
       6.5.3 ABSetTransmitParms
       6.5.4 ABAudioStart
       6.5.5 ABAudioDone
       6.5.6 ABDeviceDisconnect
       6.5.7 ABMute
7 Example Message Construction
Appendix A ITS Data Bus Application Message Layer Lexicon
         A.1 Scope
         A.2 IDB Application Message Layer PDU Elements
         A.3 Explanations and Rationale
         A.4 Notes
Figures
Tables