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Time Division Multiplexing (TDM) to Internet Protocol (IP) White Paper

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Time Division Multiplexing (TDM) to Internet Protocol (IP) White Paper TDM to IP White Paper FAA Telecommunications Infrastructure (FTI)-2 Time Division Multiplexing (TDM) to Internet Protocol (IP) White Paper Networks and Telecommunications Community of Interest FTI-2 Working Group Technology, Performance, and Operations Subcommittee Date Released: May 11, 2017 Synopsis Virtually all local exchange carriers in the U.S. will migrate their networks from the current TDM based architecture to an architecture that is based on Ethernet access to an IP fabric. Two primary drivers for this migration are (1) more efficient bandwidth in an IP environment and (2) equipment manufacturers and chip set providers will soon discontinue production of TDM based equipment. This white paper will attempt to address some of the fundamental issues relating to TDM to IP migration; it also addresses timelines, migration strategies and network adaptive technologies for those applications that continue to demand a TDM interface. American Council for Technology-Industry Advisory Council (ACT-IAC) 3040 Williams Drive, Suite 500, Fairfax, VA 22031 www.actiac.org ● (p) (703) 208.4800 (f) ● (703) 208.4805 Advancing Government Through Collaboration, Education and Action Page i TDM to IP White Paper American Council for Technology-Industry Advisory Council (ACT-IAC) The American Council for Technology (ACT) – Industry Advisory Council (IAC) is a non-profit educational organization established to create a more effective and innovative government. ACT-IAC provides a unique, objective and trusted forum where government and industry executives are working together to improve public services and agency operations through the use of technology. ACT-IAC contributes to better communications between government and industry, collaborative and innovative problem solving and a more professional and qualified workforce. The information, conclusions and recommendations contained in this publication were produced by volunteers from industry and government advisors supporting the objective of more effective and innovative use of technology by federal agencies. ACT-IAC volunteers represent a wide diversity of organizations (public and private) and functions. These volunteers use the ACT-IAC collaborative process, refined over thirty years of experience, to produce outcomes that are consensus-based. The findings and recommendations contained in this report are based on consensus and do not represent the views of any particular individual or organization. To maintain the objectivity and integrity of its collaborative process, ACT-IAC does not accept government funding. ACT-IAC welcomes the participation of all public and private organizations committed to improving the delivery of public services through the effective and efficient use of IT. For additional information, visit the ACT-IAC website at www.actiac.org. The ACT-IAC Networks & Telecommunications (N&T) Community of Interest (COI) The N&T COI mission is to provide clarity, impartial feedback, and points for consideration on networks and telecom issues identified in collaboration with the federal government and industry. The N&T COI provides a forum where government and industry executives are working together on key telecommunication issues such as interoperability, information sharing, communications architectures, wireless technologies, converged internet protocol based services, security, and continuity of service. The N&T COI established a working group to facilitate collaboration between government and industry on matters concerning the upcoming FTI-2 effort. Disclaimer This document has been prepared to contribute to a more effective, efficient and innovative government. The information contained in this report is the result of a collaborative process American Council for Technology-Industry Advisory Council (ACT-IAC) 3040 Williams Drive, Suite 500, Fairfax, VA 22031 www.actiac.org ● (p) (703) 208.4800 (f) ● (703) 208.4805 Advancing Government Through Collaboration, Education and Action Page ii TDM to IP White Paper in which a number of individuals participated. This document does not – nor is it intended to – endorse or recommend any specific technology, product or vendor. Moreover, the views expressed in this document do not necessarily represent the official views of the individuals and organizations that participated in its development. Every effort has been made to present accurate and reliable information in this report. However, ACT-IAC assumes no responsibility for consequences resulting from the use of the information herein. This paper was prepared by ACT-IAC after consultation with the Federal Aviation Administration. The information and opinions contained herein are those of the ACT-IAC and are not reflection of any planned strategy or approach to FTI-2 by the FAA. Copyright © American Council for Technology, 2017. This document may not be quoted, reproduced and/or distributed unless credit is given to the American Council for Technology- Industry Advisory Council. For further information, contact the American Council for Technology-Industry Advisory Council at (703) 208-4800 or www.actiac.org. American Council for Technology-Industry Advisory Council (ACT-IAC) 3040 Williams Drive, Suite 500, Fairfax, VA 22031 www.actiac.org ● (p) (703) 208.4800 (f) ● (703) 208.4805 Advancing Government Through Collaboration, Education and Action Page iii TDM to IP White Paper Contents 1. INTRODUCTION ............................................................................................................................................ 1 2. BACKGROUND ............................................................................................................................................. 1 3. IMPLEMENTATION TIMELINE ..................................................................................................................... 2 4. FUNDAMENTAL ISSUES .............................................................................................................................. 2 5. FAA MIGRATION STRATEGIES ................................................................................................................... 4 6. EXISTING FTI CPE COMPLEMENT AND TELECOMMUNICATIONS ACCESS ........................ 5 7. NETWORK ADAPTATION TECHNOLOGIES .............................................................................................. 6 7.1 PSEUDOWIRE ............................................................................................................................................... 6 7.1.1 How Pseudowire Emulates TDM ....................................................................................................... 7 7.1.2 Available Pseudowire types ............................................................................................................... 8 7.2 MICROWAVE AND SATCOM .......................................................................................................................... 9 7.3 4G/LTE WIRELESS ....................................................................................................................................... 9 7.4 TDMA-VSAT WIRELESS .............................................................................................................................. 9 8. NETWORK ADAPTATION ARCHITECTURE ............................................................................................. 10 9. NETWORK ADAPTATION MIGRATION STRATEGY ................................................................................ 11 10. NETWORK TIMING CONSIDERATIONS FOR MIGRATING FTI FROM TDM TO ETHERNET TRANSPORT ........................................................................................................................................................ 12 10.1 NETWORK TIMING USING TDM TRANSPORT NETWORK .............................................................................. 13 10.2 ASYNCHRONOUS T1 TRANSPARENCY IN THE TRANSPORT NETWORK .......................................................... 14 10.3 ETHERNET TRANSPORT FOR TDM PSEUDOWIRE ..................................................................................... 15 10.4 METRO ETHERNET FORUM MEF 3 .......................................................................................................... 16 10.5 METRO ETHERNET FORUM MEF 8 .......................................................................................................... 16 11. THE INTERNET SOCIETY NETWORK WORKING GROUP RFC 5087 .................................................... 17 11.1 TIMING RECOVERY ................................................................................................................................. 17 11.2 CLOCK RECOVERY ................................................................................................................................. 19 11.3 SYNCHRONOUS NETWORK SCENARIOS ................................................................................................... 20 11.3.1 Provider Edge (PE) Synchronized Network ................................................................................ 20 11.3.2 Customer Edge (CE) Synchronized Network .............................................................................. 21 11.3.3 Relative Network Scenario .......................................................................................................... 21 11.3.4 Adaptive Network Scenario ......................................................................................................... 22 11.3.5 Network Synchronization
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