EN 60728-7-2:2005

INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Reference architecture forward and return channel specifications
5 Media access control layer specification
  5.1 Overview
  5.2 MAC packet transport
  5.3 MAC packet structure
  5.4 MAC packet delimiters
  5.5 MAC protocol data units (PDUs)
6 MAC protocol operation
  6.1 Non-volatile parameters
  6.2 Duplex capabilities
  6.3 Packet priorities
  6.4 Packet reception
  6.5 NE responses
  6.6 Message sequence numbers and transaction synchronization
  6.7 Solicited messages
  6.8 Autonomous (unsolicited) messages
  6.9 Return channel transmissions
  6.10 MAC state machines
Annex A (informative) Operational details
      A.1 Introduction
      A.2 Time of day
      A.3 Firmware downloads
      A.4 NE addressing
      A.5 Alarm processing HMS MAC protocol
      A.6 Automatic channel discovery
      A.7 Auto-registration
      A.8 Configuration changes and SNMP trap generation

Specifies requirements for The Hybrid Fibre Coax (HFC) Outside Plant (OSP) Media Access Control (MAC) Layer. This standard is part of the series developed to support the design and implementation of interoperable management systems for evolving HFC cable networks. The HMS Media Access Control (MAC) layer specification describes the messaging and protocols implemented at the Data Link Layer (DLL), layer 2 in the 7 layer ISO-OSI reference model, that support reliable and efficient communications between HMS compliant transponders interfacing to managed OSP network elements (NEs) and a centralized head-end element (HE).