1、 ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP Document number CP/2008-1006r1a This document was approved as an American National Standard by the ANSI Board of Standards Review on 9 June 2014. It is a reaffirmation of the 2009 edition, CP/2008-1006r1. This standar
2、d was originally published when the Entertainment Services and Technology Association was operating under the name of PLASA North America. ESTA has reverted to its original name, and this document has been rebranded with the current corporate name and logo. No changes have been made to the contents
3、of the standard. 2017 ESTA intentionally blank page ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA i CP/2008-1006r1a NOTICE and DISCLAIMER ESTA does not approve, inspect, or certify any installations, procedures, equipment or materials for compliance with
4、 codes, recommended practices or standards. Compliance with a ESTA standard or an American National Standard developed by ESTA is the sole and exclusive responsibility of the manufacturer or provider and is entirely within their control and discretion. Any markings, identification or other claims of
5、 compliance do not constitute certification or approval of any type or nature whatsoever by ESTA. ESTA neither guarantees nor warrants the accuracy or completeness of any information published herein and disclaims liability for any personal injury, property or other damage or injury of any nature wh
6、atsoever, whether special, indirect, consequential or compensatory, directly or indirectly resulting from the publication, use of, or reliance on this document. In issuing and distributing this document. In issuing this document, ESTA does not either (a) undertake to render professional or other ser
7、vices for or on behalf of any person or entity, or (b) undertake any duty to any person or entity with respect to this document or its contents. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determinin
8、g the exercise of reasonable care in any given circumstance. Published by: Entertainment Services and Technology Association 630 Ninth Avenue, Suite 609 New York, NY 10036 USA Phone: 1-212-244-1505 Fax: 1-212-244-1502 standardsesta.org ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems U
9、sing SNTP and NTP 2017 ESTA ii CP/2008-1006r1a The ESTA Technical Standards Program The ESTA Technical Standards Program was created to serve the ESTA membership and the entertainment industry in technical standards related matters. The goal of the Program is to take a leading role regarding technol
10、ogy within the entertainment industry by creating recommended practices and standards, monitoring standards issues around the world on behalf of our members, and improving communications and safety within the industry. ESTA works closely with the technical standards efforts of other organizations wi
11、thin our industry, including USITT and VPLT, as well as representing the interests of ESTA members to ANSI, UL, and the NFPA. The Technical Standards Program is accredited by the American National Standards Institute. The Technical Standards Council (TSC) was established to oversee and coordinate th
12、e Technical Standards Program. Made up of individuals experienced in standards-making work from throughout our industry, the Council approves all projects undertaken and assigns them to the appropriate working group. The Technical Standards Council employs a Technical Standards Manager to coordinate
13、 the work of the Council and its working groups as well as maintain a “Standards Watch” on behalf of members. Working groups include: Control Protocols, Electrical Power, Event Safety, Floors, Fog and Smoke, Followspot Position, Photometrics, Rigging, and Stage Lifts. ESTA encourages active particip
14、ation in the Technical Standards Program. There are several ways to become involved. If you would like to become a member of an existing working group, as have over four hundred people, you must complete an application which is available from the ESTA office. Your application is subject to approval
15、by the working group and you will be required to actively participate in the work of the group. This includes responding to letter ballots and attending meetings. Membership in ESTA is not a requirement. You can also become involved by requesting that the TSC develop a standard or a recommended prac
16、tice in an area of concern to you. The Control Protocols Working Group, which authored this Standard, consists of a cross section of entertainment industry professionals representing a diversity of interests. ESTA is committed to developing consensus-based standards and recommended practices in an o
17、pen setting. ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA iii CP/2008-1006r1a Contact Information Technical Standards Manager Karl G. Ruling Entertainment Services and Technology Association 630 Ninth Avenue, Suite 609 New York, NY 10036 USA 1-212-244-1
18、505 karl.rulingesta.org Assistant Technical Standards Manager Erin Grabe Entertainment Services and Technology Association 630 Ninth Avenue, Suite 609 New York, NY 10036 USA 1-212-244-1505 erin.grabeesta.org Technical Standards Council Chairpersons Mike Garl Mike Garl Consulting LLC 1-865-389-4371
19、Mike Wood Mike Wood Consulting LLC 1-512-288-4916 Control Protocols Working Group Chairperson Michael Lay Philips Color Kinetics 3 Burlington Woods Drive Burlington, MA 01803 USA 1-781-418-9145 ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA iv CP/2008-1
20、006r1a Acknowledgments The Control Protocols Working Group members when this document was approved by the working group on 1 May 2014 are shown below. Voting members: Daniel W. Antonuk; Electronic Theatre Controls, Inc.; MP Robert Bell; Acuity Brands Inc.; MP Marcus Bengtsson; LumenRadio AB; MP Scot
21、t M. Blair; Full Throttle Films/ VER; DR Milton Davis; Doug Fleenor Design, Inc.; MP Casey Diers; DesignLab Chicago, Inc.; DR Gary Douglas; Acuity Brands Inc.; MP Doug Fleenor; Doug Fleenor Design, Inc.; MP Howard Forryan; Harting KGAA; G Garrett Gallant; Acuity Brands Inc.; MP Ed Garstkiewicz; Hart
22、ing KGAA; G Robert Goddard; Goddard Design Co.; MP Dennis Grow; I.A.T.S.E. Local 728; U Mitch Hefter; USITT; U Jeremy Hochman; Full Throttle Films/ VER; DR John Huntington; I.A.T.S.E. Local 1; U Tyrone Mellon_Jr.; Lex Products Corp.; CP Michael Karlsson; LumenRadio AB; MP Hyun Jong Kim; Electronics
23、and Telecommunications Research Institute; G Peter Kirkup; LumenRadio AB; MP Paul Kleissler; City Theatrical, Inc.; MP Edwin S. Kramer; I.A.T.S.E. Local 1; U Ulrich Kunkel; DIN, NVBF Committee; U Roger Lattin; I.A.T.S.E. Local 728; U Hans Lau; LumenRadio AB; MP Michael Lay; Royal Philips; MP Sang-Ky
24、u Lim; Electronics and Telecommunications Research Institute; G Joshua Liposky; Lex Products Corp.; CP Kevin Loewen; Acuity Brands Inc.; MP Simon Newton; Open Lighting Project; G Maya Nigrosh; Electronic Theatre Controls, Inc.; MP Philip Nye; Acuity Brands Inc.; MP Kimberly Corbett Oates; Schuler Sh
25、ook; DE Edward A. (Ted) Paget; Daktronics Inc. ; G Jason Potterf; Cisco; MP Charles Reese; Production Resource Group; DR Alan M. Rowe; I.A.T.S.E. Local 728; U Larry Schoeneman; DesignLab Chicago, Inc.; DR Eckart Steffens; Soundlight, the DMX Company; CP Steve Terry; Electronic Theatre Controls, Inc.
26、; MP Ken Vannice; Ken Vannice LLC; G Peter Willis; Howard Eaton Lighting Ltd.; CP Observer (non-voting) members: Simon Alpert; Lighttech Event Technologies; CP Klaus Amling; Licht-Technik; MP Matthew Ardine; IATSE Local 728; U Avraham Mendall Mor “Avi“; Lightswitch; U Robert Barbagallo; Solotech Inc
27、.; U ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA v CP/2008-1006r1a Paul Beasley; Walt Disney Company; U BenDarrington; Wireless Solutions Sweden AB; MP Adam Bennette; Electronic Theatre Controls, Inc.; MP David Bertenshaw; David Bertenshaw; G Stephen B
28、ickford; T. Kondos Associates; U Torrey Bievenour; Vision Quest Lighting; G Lee J. Bloch; Bloch Design Group, Inc.; G David A. Boller; Organic Machines LLC; CP Ron Bonner; PLASA EU; G Andr Broucke; Andr Broucke; G Ken Bruns; Lumenpulse Lighting Inc.; MP John (Javid) D. Butler; Integrated Theatre, In
29、c.; CP Justyn Butler; JBOTS; CP Jean-Francois Canuel; A.C. Lighting Ltd.; CP Steve Carlson; High Speed Design, Inc.; MP Nyasha Chigwamba; Rhodes University; U Sang-Il Choi; Kyungpook National University; G Soo-Myong Chung; Bloch Design Group, Inc.; G Paul J. Clark; HxDx; CP Edward R. Condit; Edward
30、R. Condit; G Fraser Connolly; Artistic Licence Holdings; DE Eric Cornwell; West Side Systems; U Stuart Cotts; Oregon Shakespeare Festival; U Klas Dalbjorn; TC Group; MP Jeremy Day; Royal Philips; MP Gilray Densham; CAST Group Inc; MP Gary Dove; Dove Systems; MP Yongshun Duan; Macostar International
31、Ltd.; CP Hamish Dumbreck; James Embedded Systems Engineering; MP Lauren E. Dunn; Lauren E. Dunn (Larry); DE Jerry Durand; Durand Interstellar, Inc.; CP James Eade; PLASA EU; G Andrew Eales; Rhodes University ; U Bill Ellis; Candela Controls, Inc.; U Paul K. Ericson; Sparling DE Jon R. Farley; Sixtee
32、nth Avenue Systems; CP Martin Farnik; Robe Show Lighting s.r.o.; MP Trevor Forrest; Helvar Lighting Control; MP Steve Friedlander; Auerbach Pollock Friedlander; U Jerry Gorrell; Theatre Safety Programs; G Tom Grimes; Barco; MP Josh Gubler; Josh Gubler; CP Rob Halliday; Rob Halliday; U Sean Harding;
33、High Output, Inc.; G Douglas Heriot; Douglas Heriot; MP Bill Hewlett; Hewlett Electronics; CP Helge Hoffmann; JB Lighting; MP Jim Holladay; Luxence; G Wayne David Howell; Artistic Licence Holdings; DE Sierk Janszen; Ground Zero; U Eric Johnson; Eric Johnson; G Rob Johnston; Interactive Technologies,
34、 Inc.; MP Ed Jones; Edwin Jones Co., Inc.; CP Jussi Kallioinen; Eastway Sound U Tae Gyu Kang; Electronics and Telecommunications Research Institute; G ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA vi CP/2008-1006r1a Reza Khanmalek; A.C. Lighting Ltd.; CP
35、 Hiroshi Kita; Marumo Electric Co., Ltd.; MP Phil Klapwyk; IATSE Local 891; U Mark T. Kraft; Lehigh Electric Products Co.; MP Jason Kyle; JPK Systems Ltd.; MP Rick Leinen; Leviton Manufacturing Co., Inc.; MP Hans Leiter; Electronic Theatre Controls, Inc.; MP Jon Lenard; Applied Electronics; MP Maart
36、en Lepelaars; eldoLED; MP Mark Manthei; Shure Inc.; G Paul F. Mardon; Pulsar Ltd.; MP Mick Martin; ShowCAD Control Systems; MP Paul Kenneth McEwan; Cooper Controls Ltd.; MP John Mehltretter; Lehigh Electric Products Co.; MP Jeff T. Miller; Walt Disney Company; U John Musarra; John Musarra; U Tobin N
37、eis; Barbizon Companies; DR Dan T. Nguyen; LynTec; MP Lars F. Paape; Scientific Algorithms and Embedded Systems; U Ben Peoples; Pittsburgh Hoist CP Gary Pritchard; LSC Lighting Systems PTY Ltd; MP Gordan Rancic; Phoenix Service srl; MP Torben Kaas Rasmussen; Martin Professional A/S; G Charlie Richmo
38、nd; Richmond Sound Design Ltd.; CP Bernardo Benito Rico; Ben-Ri Electronica S.A.; MP Steve Roberts; Carr G Erwin Rol; Erwin Rol; G Dietmar Rottinghaus; Connex GmbH; MP Richard Salzedo; Avolites Ltd.; MP Yngve Sandboe; Sand Network Systems, Inc.; MP Martin Searancke; Dream Solutions Ltd.; MP Chuck Se
39、ifried; City of Phoenix; U John Sellers; AIM Northwest; G Andrew Sherar; Lightmoves PLC; MP Yehuda Shukram; Compulite Systems; MP Sean Sill; Open Lighting Project; DE Storm K. Staley; Stormwerx; U Ralph Stillinger; Royal Philips; MP Bart Swinnen; Luminex LCE; MP Arnold Tang; Arnold Tang Productions;
40、 U Geoffrey O. Thompson; IEEE 802.3/Nortel Networks; G Christopher Tilton; Westlake Reed Leskosky; DE Robert Timmerman; Royal Philips; MP David Timmins; Jands Electronics; MP Victoria Tisdale; Google Summer of Code 2013; G J. B. Toby; Avolites Ltd.; MP Bob Toms; Catalyst Microsystems LLC; G Robert T
41、ooker; Robert Tooker; U Tad Trylski; Tad Trylski; U Stephen J. Tyrrell; Quantum Logic; MP Tracy Underhill; 4U Consulting; G Steve Unwin; Pulsar Ltd.; MP Samuli Valo; Picturall Ltd.; MP Carlo Venturati; Clay Paky S.P.A.; MP Will Wagner; Carallon Ltd.; MP ANSI E1.30-3 2009 (R2014) EPI 25 Time Referenc
42、e in ACN Systems Using SNTP and NTP 2017 ESTA vii CP/2008-1006r1a Oliver Waits; Avolites Ltd.; MP John Warwick; Royal Philips; MP Colin Waters; TMB; DR Ralph Weber; ENDL Texas; G Lars Wernlund; Lewlight; MP Michael (Mike) Whetstone; Integrated Theatre, Inc.; CP Loren Wilton; Showman Systems; CP Barb
43、ara Wohlsen; Barbara Wohlsen; U C. S. Wong; Macostar International Ltd.; CP Jiantong Wu; Beijing Special Engineering Design G Kehang Wu; Shure Inc.; G David Yellin; LightMinded Industries, Inc.; MP Larry Zoll; Zoll Design U Interest category codes: CP = Custom-market Producer DE = Designer DR = Deal
44、er or Rental company G = General interest MP = Mass-market Producer U = User ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA 1 CP/2008-1006r1a Table of Contents NOTICE and DISCLAIMER . i Contact Information . iii Acknowledgments . iv Table of Contents 1 Fo
45、reword 2 1 Introductory Discussion 3 2 Definitions . 3 3 Synchronization Models . 3 3.1 Synchronizing Control vs. Time Reference . 3 3.2 Control Techniques Based on Synchronized Time . 4 3.3 Time and Synchronization Model: Introduction to NTP and SNTP . 4 4 Scope and Applicability 4 5 NTP and SNTP:
46、an Informative Description . 5 5.1 Difference Between SNTP and NTP 6 5.1.1 NTP . 6 5.1.2 SNTP . 6 5.2 SNTP Servers 6 5.3 Use of NTP Servers . 7 6 EPI Requirements 7 6.1 System and Server Configuration 7 6.1.1 Choice of Time Reference 7 6.1.2 SNTP Servers . 7 6.1.3 Client-Server Hierarchy . 7 6.1.4 S
47、erver Modes 7 6.1.5 Precautions for Use of Anycast Mode . 8 6.2 Client Configuration . 8 6.3 Server Discovery for SNTP Clients 8 7 Suggestions and Recommendations 9 References 9 Normative . 9 Informative . 9 ANSI E1.30-3 2009 (R2014) EPI 25 Time Reference in ACN Systems Using SNTP and NTP 2017 ESTA
48、2 CP/2008-1006r1a ACN EPIs ANSI E1.17-2006 is the “ESTA Architecture for Control Networks” standard ACN. It specifies an architecture including a suite of protocols and languages which may be configured and combined with other standard protocols in a number of ways to form flexible networked control
49、 systems. E1.17 Profiles for Interoperability (EPIs) are standards documents which specify how conforming implementations are to operate in a particular environment or situation in order to guarantee interoperability. They may specify a single technique, set of parameters or requirement for the various ACN components. They may also specify how other standards (including other EPIs) either defined within ACN or externally are to be used to ensure i
