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List of PTP implementations

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Precision Time Protocol (PTP) is a widely adopted protocol for delivery of precise time over a computer network. A complete PTP system includes PTP functionality in network equipment and hosts. PTP may be implemented in hardware, software or a combination of both.

PTP is implemented in end systems and in PTP-aware networking hardware. PTP implementations may have the ability to serve as a source of time for the network, a grandmaster, or operate as a slave and receive time and synchronize to the grandmaster. Some implementations are able to operate as either master or slave.

Routers and switches

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  • Artel | Quarra 1 Gbps PTP Ethernet Switch[1]
  • Artel | Quarra PTP 10 Gbps Ethernet Switch[2]
  • ACRA Control, Limited (now Curtiss-Wright[3]) airborne switches[4][5]
  • Alcatel-Lucent (now Nokia Networks[6]) 7210 Service Access Switch
  • Alcatel-Lucent 7705 Service Aggregation Router[7]
  • Alcatel-Lucent 7750 Service Router[8]
  • Allen-Bradley Stratix 5400, 5410, 5700, 8000 Managed Switches[9]
  • Arista 7050X/X2/X3 Series Switches
  • Arista 7060X/X2 Series Switches
  • Arista 7150 Series Switches[10]
  • Arista 7280E/R/R2 Series Switches
  • Arista 7500E/R/R2 Series Switches
  • Aruba 2930M Series Switches (with WC.16.04 software release)
  • Aruba CX 6300 M series
  • Aruba CX 8360
  • BitStream Hyperion 300/402/500 Series Switches
  • Brocade 6910 Ethernet Access Switch[11]
  • Dell EMC PowerSwitch S4100-ON Series Switches[12]
  • Dell EMC PowerSwitch S5200-ON Series Switches[12]
  • Cisco 7600 Router [13]
  • Cisco ASR 903 Router [14]
  • Cisco ASR 9000 Router [15]
  • Cisco Catalyst 9300 Switch [16]
  • Cisco CGS 2520 Switch [17]
  • Cisco Industrial Ethernet 3000 Series Switches[18]
  • Cisco Industrial Ethernet 5000 Series Switches[19]
  • Cisco Nexus 3000 Series Switches [20]
  • Cisco Nexus 5000 Series Switches [21]
  • Cisco Nexus 7000 router[22]
  • Cisco Nexus 9000 router[23]
  • Connect Tech Inc. Xtreme/10G Managed Ethernet Switch/Router [24]
  • Crystal Instruments IEEE 1588 Spider-HUB Industrial Ethernet Switch [25]
  • Ericsson Router 6000 series [26]
  • Extreme Networks E4G-200 router [27]
  • Extreme Networks E4G-400 router [28]
  • Fibrolan Falcon-R Class xHaul Switche/Grandmaster[29]
  • Fibrolan Falcon-M Class Switches/Routers[30]
  • Fibrolan Falcon-MTS Grandmaster[31]
  • Fibrolan uFalcon-S Switch series[32]
  • Fibrolan uFalcon-ST Switch series[33]
  • GarrettCom 10KT Industrial Managed 1588v2 Switch[34]
  • GarrettCom 12KX Industrial Managed 1588v2 Ethernet Switch[35]
  • HBM Rugged Ethernet PTPv2 Switch with PoE: SomatXR EX23-R[36]
  • Hirschmann MACH1040 19" Industrial Ethernet Switches with IEEE 1588v2 support[37]
  • Hirschmann MICE Modular Industrial Ethernet Rail Switch Modules with IEEE 1588v2 support[38]
  • IBM RackSwitch G8264 and IBM RackSwitch G8316 [39]
  • iS5 Communications Raptor Switch [40]
  • Juniper Networks MX Universal Edge Routers[41]
  • Juniper Networks QFX
  • Kyland SICOM3028GPT series
  • Kyland SICOM3000A series
  • Kyland Ruby3A
  • Mellanox SN2100 / SN2700 (Spectrum silicon) switches with MLNX-OS/ONYX (in GA since 3.6.5011) for PTP IEEE-1588 (SMPTE ST2059-2 profile)[42] or with Cumulus Linux (from version 3.6) with the ptp4l Linux package.[43]
  • Moxa PowerTrans series (PT-7728-PTP) and EDS-500 and EDS-600 series switches
  • Oregano Systems syn1588 Gbit Switch[44]
  • Planet Technology USA, some IGS switches (e.g. IGS-20040MT) [45]
  • Red Lion N-Tron Series NT24k All-Gigabit Managed Industrial Ethernet Switches [46]
  • Ruggedcom IEEE 1588 PTP Solutions including RSG2488, RSG2288, RX1000 and RS416[47]
  • Seven Solutions White Rabbit Precise PTP Switch [48]
  • Siemens SCALANCE X-300 and XR-300 Industrial Managed Ethernet Switch with 1588 support (all X308-2M, all XR-324-12M, all XR324-4M, all X302-7EEC and X307-2EEC)[49]
  • Teletronics Technology Corporation airborne switches[50]
  • TSN Systems - TSN Automotive Switch Q50.[51]
  • EtherWAN IG5 Rack Series - Managed 24-port Gigabit and 4-port 1G/10G SFP+ Ethernet Switch[52]
  • EtherWAN EX73900X Series -Managed 12-port Gigabit and 4-port 10GSFP+ Ethernet Switch[53]
  • EtherWAN EX73900E Series - Managed 12-port Gigabit and 4-port 1G SFP Ethernet Switch[54]

Stand-alone solutions

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  • Antenna-integrated OTMC 100 PTP grandmaster clock from OMICRON Lab [55]
  • AVN-GMCS IEEE1588 PTP Grandmaster Clock with GPS Receiver from Sonifex [56]
  • Calnex Solutions provides a number of IEEE 1588v2 test products for field and factory use including Paragon-X, Paragon-100G and Sentinel[57]
  • EKOSync 1588A and 1588B IEEE 1588v2 PTP/NTP GPS clocks from EKOSinerji[58]
  • FSMLabs 1 GBps Pocket GrandMaster IEEE 1588v2 PTP/NTP GPS clocks from FSMLabs[59]
  • FSMLabs 10 GBps Enterprise GrandMaster IEEE 1588v2 PTP/NTP GPS clocks from FSMLabs[60]
  • IEEE 1588 PTP GPS Grandmaster Clock from Optimal Technologies[61]
  • IEEE 1588 PTP M68 production module from Qulsar (formerly Conemtech) [62]
  • IEEE 1588 PTP P6x Sub-System board from Qulsar (formerly Conemtech) [63]
  • IEEE 1588 PTP PCIe add in cards from Korusys[64]
  • IEEE 1588 PTP Solutions from FEI-Zyfer, Inc.
  • IEEE 1588 PTP Solutions from Fibrolan
  • IEEE 1588 PTP solutions from Microsemi
  • IEEE 1588 PTP Solutions from Oscilloquartz SA[65]
  • IEEE 1588 PTP testers and monitoring solutions from Albedo Telecom[66]
  • IEEE 1588 PTP Time Converter TICRO 100 from OMICRON Lab [67]
  • IEEE 1588 solutions from Meinberg[68]
  • IEEE 1588v2 PTP GPS Master & Slave clocks from Masterclock[69]
  • IEEE 1588v2 PTP GPS Master & Slave clocks from Tekron[70]
  • IEEE 1588v2 PTP GPS Smartgrid clocks from Tekron[70]
  • IPITEK MSP-1588[71]
  • Open Time Server : 1GbE, Rubidium IEEE 1588 PTP, NTP, SyncE, PPS GNSS grandmaster clock from Timebeat.app[72]
  • Open Time Server : 10/25GbE, Rubidium IEEE 1588 PTP, NTP, SyncE, PPS GNSS grandmaster clock from Timebeat.app[73]
  • Open Timecard : PCIe card OCXO IEEE 1588 PTP, NTP, SyncE, PPS GNSS grandmaster clock from Timebeat.app[74]
  • Open Timecard : PCIe card Rubidium IEEE 1588 PTP, NTP, SyncE, PPS GNSS grandmaster clock from Timebeat.app[75]
  • syn1588 VIP single chip solution from Oregano Systems[76]
  • TSN Systems TSN Box 3.0 - Hardware Interface for Automotive and Industrial TSN Test & Measurement Applications.[51]
  • White Rabbit LEN from Seven Solutions[77]
  • White Rabbit ZEN Time Provider from Seven Solutions[78]
  • White Rabbit Cute-WR-DP from SyncTechnology[79]
  • White Rabbit Mini-WR from SyncTechnology[80]
  • IEEE 1588 PTP solutions from Mobatime (belongs to the Moser-Baer Group)[81]
  • IEEE 1588 PTP Solutions from PolyNet[82]

Software

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  • Domain Time II PTPv2 server and client for Windows and Linux from Greyware Automation Products, Inc.[83]
  • IEEE 1588 Hoptroff Time Suite Enterprise from Hoptroff Smart Timing | Built on the Zero Trust model and encrypted to maximum standards to ensure resilient cybersecurity, delivered via dedicated optic fibre connection | MiFID II, CAT FINRA NMS compliance | [84]
  • IEEE 1588 Protocol Software from HMS Industrial Networks (formerly IXXAT Automation GmbH).[85][86]
  • IEEE 1588 PTP 2002/2008 Master Stack Software from Real-Time Systems GmbH.
  • IEEE 1588 PTP Stack, XR7 PTP, from TTTech Flexibilis Oy[87]
  • IEEE 1588 Stack from Civica Ltd.[88]
  • Microsoft Windows Server 2019[89]
  • Microsoft Windows 10 October 2018 Update (version 1809)[89]
  • Openptp from Flexibilis Oy is GPL licensed open source implementation of the IEEE 1588-2008 (Version 2) PTP specification.[90]
  • PTP Track Hound,[91] free tool from Meinberg to record, visualize and analyze PTP network traffic
  • PPSi, a multi-platform ptp implementation developed by CERN.[92]
  • PTPd and its derivatives
  • syn1588 PTP Stack from Oregano Systems: A portable implementation of the complete IEEE1588-2008 standard with special features like Boundary Clock support, Unicast operation, IPv6 support and security enhancements.[93]
  • The Linux PTP Project – an implementation of the Precision Time Protocol (PTP) according to IEEE standard 1588 for Linux. The dual design goals are to provide a robust implementation of the standard and to use the most relevant and modern Application Programming Interfaces (API) offered by the Linux kernel.[94]
  • Timebeat - PTP synchronisation platform and monitoring solution.[95]
  • TimeKeeper PTP server and client from FSMLabs, Inc.[96]
  • TSEP Chronos: IEEE 1588 PTP 2008 Stack for Windows, Linux, and RTX64(IntervalZero) from Technical Software Engineering Plazotta.[97]
  • TsEX module of the NeEX platform - IEEE1588 compliant PTP stack by emagine [98]
  • UMAN PTP Stack - 802.1AS (gPTP), Automotive PTP 1.5.[51]

Silicon

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Other

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References

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  1. ^ "Quarra 1 Gbps PTP Ethernet Switch". Artel Electronics. n.d. Archived from the original on 26 November 2022. Retrieved 15 December 2023.
  2. ^ "Quarra PTP 10 Gbps Ethernet Switch". Artel Electronics. n.d. Archived from the original on 1 April 2023. Retrieved 15 December 2023.
  3. ^ Ryan, Jim (28 July 2011). "CURTISS-WRIGHT ACQUIRES ACRA CONTROL LTD | LEADING DESIGNER AND MANUFACTURER OF DATA ACQUISITION SYSTEMS FOR GLOBAL DEFENSE AND COMMERCIAL AEROSPACE MARKETS" (Press release). Parsippany, New Jersey. GlobeNewswire. Archived from the original on 24 May 2022. Retrieved 15 December 2023. Curtiss-Wright Corporation (NYSE:CW) announced today that it has acquired ACRA Control, Limited (ACRA) for approximately €42 million (approximately $61 million) in cash. [...] In addition, ACRA's advanced ethernet switch technology will enhance the value of Curtiss-Wright's system-level approach to C4ISR (Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance) solutions.
  4. ^ "Curtiss-Wright | Flight test switches". Curtiss-Wright Defense Solutions. 2023. Archived from the original on 5 December 2023. Retrieved 15 December 2023. Our selection of flight test switches includes support for IEEE-1588 PTP, embedded v1 and v2 Grandmaster support and translation, and GPS and digital IRIG-B input and output.
  5. ^ ACRA Control Ltd (26 July 2010). "ACRA CONTROL Launches Airborne IEEE 1588 Ethernet Switch" (Press release). Churchtown, Dublin, Ireland. Newswire Today. Archived from the original on 8 October 2012. Retrieved 15 December 2023. Acra Control today announces the launch of a ruggedized managed Grandmaster Ethernet switch designed for airborne applications.
  6. ^ "7210 Service Access Switch". Alcatel-Lucent | Nokia Networks. 2023. Archived from the original on 14 November 2023. Retrieved 15 December 2023.
  7. ^ "7705 Service Aggregation Router". Alcatel-Lucent. Retrieved 2014-03-30.
  8. ^ "7750 Service Router". Alcatel-Lucent. Retrieved 2014-03-30.
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  10. ^ "7150 Series - Arista". Aristanetworks.com. Retrieved 2014-03-30.
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  12. ^ a b DELL EMC NETWORKING S4100-ON
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  17. ^ "2500 Series Connected Grid Switches - Products & Services". Cisco. Retrieved 2014-03-30.
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  20. ^ "Nexus 3000 Series Switches - Products & Services". Cisco. Retrieved 2014-03-30.
  21. ^ "Nexus 5000 Series Switches - Products & Services". Cisco. Retrieved 2014-03-30.
  22. ^ "Chapter 4: Configuring PTP" (PDF), Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Cisco Systems, retrieved 2013-10-26
  23. ^ "Precision Time Protocol for Timing in IP Fabric for Media Guide". Cisco. Retrieved 2020-05-12.
  24. ^ "Xtreme/10G Managed Ethernet Switch/Router". Connect Tech. Retrieved 2020-09-24.
  25. ^ "Spider-HUB IEEE 1588 Industrial Ethernet Switch – Crystal Instruments". Crystalinstruments.com. Retrieved 2014-03-30.
  26. ^ "Router 6000 R17 Training Programs". Ericsson. 2018-09-04. Retrieved 2018-09-04.
  27. ^ "Mobile Backhaul - Extreme Networks E4G-200". Extreme Networks. 2014-03-26. Retrieved 2014-03-30.
  28. ^ "Carrier Ethernet Platform- Extreme Networks E4G-400". Extreme Networks. 2014-03-26. Retrieved 2014-03-30.
  29. ^ "R class xHaul Switche/Grandmaster". www.fibrolan.com. Fibrolan Ltd. Retrieved 2018-03-27.
  30. ^ "M class Switches". www.fibrolan.com. Fibrolan Ltd. Retrieved 2018-03-27.
  31. ^ "Timing distribution - Fibrolan Falcon-MTS". Fibrolan. 2015-07-21. Retrieved 2015-07-21.
  32. ^ "Mobile Backhaul - Fibrolan uFalcon-S". Fibrolan. 2015-07-21. Retrieved 2015-07-21.
  33. ^ "Mobile Backhaul - Fibrolan uFalcon-ST". Fibrolan. 2014-05-28. Retrieved 2014-05-28.
  34. ^ "GarrettCom 10KT Industrial Managed 1588v2 Ethernet Switch". GarrettCom Europe. 26 July 2011. Retrieved 26 July 2011.
  35. ^ "GarrettCom 12KX Industrial Managed 1588v2 Ethernet Switch". GarrettCom Europe. 26 July 2011. Retrieved 26 July 2011.
  36. ^ "HBM rugged Ethernet Switch SomatXR EX23-R". HBM. Retrieved 2016-04-20.
  37. ^ "Hirschmann MACH1040 series switches". Hirschmann. Retrieved 6 June 2011.
  38. ^ "Hirschmann MICE Media Modules with 1588v2 support". Hirschmann. Retrieved 6 June 2011.
  39. ^ "IBM Networking OS 7.4 Feature Summary". IBM. December 2012. Retrieved 20 December 2012.
  40. ^ "3. PTP Configuration by CLI". iBiome - PTP User Guide (PDF) (1.10.06-1 ed.). iS5 Communications Inc. January 2021. pp. 21–44. Archived (PDF) from the original on 15 December 2023. Retrieved 15 December 2023.
  41. ^ "Precision Time Protocol". Juniper Networks. 10 October 2010. Retrieved 15 November 2011.
  42. ^ "Product Brief SN2700 Open Ethernet Switch" (PDF). Mellanox Technologies. Retrieved 1 July 2018.
  43. ^ "Precision Time Protocol (PTP) Boundary Clock". Cumulus Linux. Retrieved 1 July 2018.
  44. ^ "syn1588® Gbit Switch » Oregano Systems". Oreganosystems.at. Retrieved 2014-03-30.
  45. ^ "PlanetTech IGS-20040MT switch". Planet Technology USA. Retrieved 24 September 2020.
  46. ^ "N-Tron® NT24k® All-Gigabit Managed Ethernet Switches". Red Lion Controls. 2 November 2015. Retrieved 17 May 2018.
  47. ^ "Precision Time Protocol Solutions". RuggedCom. Retrieved 10 December 2010.
  48. ^ "White Rabbit PTP Switch". Sevensolutions. 15 April 2016.
  49. ^ "SCALANCE X-300 managed". Siemens AG. 14 August 2011. Retrieved 14 August 2011.
  50. ^ "Teletronics Technology Corporation | Total System Solutions for Defense and Commercial Aerospace Test Applications". www.ttcdas.com. Retrieved 2016-09-14.
  51. ^ a b c "TSN Systems - Test & Measurement Solutions". tsn.systems. 2019-05-16. Retrieved 2019-05-29.
  52. ^ "EtherWAN Systems - IEEE 1588v2 — Applications and Operation Using". www.etherwan.com. 2024-08-14. Retrieved 2024-08-14.
  53. ^ "EtherWAN Managed Ethernet Switch". www.etherwan.com. 2024-08-14. Retrieved 2024-08-14.
  54. ^ "EtherWAN Managed Ethernet Switch". www.etherwan.com. 2024-08-14. Retrieved 2024-08-14.
  55. ^ "OTMC 100 - Antenna-integrated PTP Grandmaster Clock". Retrieved 23 February 2015.
  56. ^ "AVN-GMCS IEEE1588 PTP Grandmaster Clock with GPS Receiver". Sonifex. Retrieved 20 June 2016.
  57. ^ "What We Do | Mobile Backhaul | Solutions". www.calnexsol.com. Retrieved 2015-10-22.
  58. ^ "EKOSync 1588 PTP Time Server - Telecom & Communication Products". www.ekosinerji.com. Retrieved 2022-09-19.
  59. ^ "TimeKeeper Pocket GrandMaster" (PDF). Retrieved 21 November 2013.
  60. ^ "TimeKeeper GrandMaster". Retrieved 10 January 2017.
  61. ^ a b "IP Cores". Optimal Technologies. Retrieved 2016-03-14.
  62. ^ "Qulsar M50 module". Retrieved 28 October 2011.
  63. ^ "Qulsar P50 board". Retrieved 28 October 2011.
  64. ^ "Korusys PTP Solutions". Korusys. Retrieved 10 Feb 2012.
  65. ^ "IEEE 1588-2008 PTP Solutions". Oscilloquartz. Retrieved 10 January 2012.
  66. ^ "IEEE 1588-2008 PTP Solutions". ALBEDO Telecom. Retrieved 10 January 2015.
  67. ^ "TICRO 100 - PTP Time Converter". Retrieved 23 February 2015.
  68. ^ "Meinberg IEEE 1588 products". Meinbergglobal. Retrieved 2017-02-09.
  69. ^ "IEEE 1588v2 PTP GPS master and slave clocks from Masterclock". Retrieved 10 January 2016.
  70. ^ a b "IEEE 1588v2 PTP GPS master and slave clocks from Tekron". Retrieved 1 January 2016.
  71. ^ "IPITEK's Industry-Leading IEEE-1588v2 Solution". IPITEK. 20 April 2010. Retrieved 5 May 2011.
  72. ^ "Open Time Server". Timebeat.app. Retrieved 2024-06-25.
  73. ^ "Open Time Server". store.timebeat.app. Retrieved 2024-06-25.
  74. ^ "Open Timecard | Timebeat". Timebeat.app. Retrieved 2024-06-25.
  75. ^ "Open Timecard". store.timebeat.app. Retrieved 2024-06-25.
  76. ^ "syn1588® VIP single-chip IEEE1588 solution". Retrieved 13 February 2013.
  77. ^ "White Rabbit LEN". Sevensols. Retrieved 14 September 2017.
  78. ^ "White Rabbit ZEN". Sevensols. Retrieved 14 September 2017.
  79. ^ "Cute-WR-DP". SyncTechnology. Retrieved 15 March 2019.
  80. ^ "Mini-WR". SyncTechnology. Retrieved 15 March 2019.
  81. ^ "Mobatime IEEE products".
  82. ^ PolyNet
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  84. ^ "Hoptroff Time Suite Enterprise". SyntacticSpice. Retrieved 23 February 2023.
  85. ^ "IEEE 1588 PTP Protocol Software - V2". IXXAT. Retrieved 2 June 2011.
  86. ^ "HMS Industrial Networks acquires German IXXAT Automation". IXXAT. Retrieved 1 Feb 2013.
  87. ^ "XR7 PTP". TTTech Flexibilis. Retrieved 8 February 2018.
  88. ^ "WanStaX Timing and Synchronisation Control" (PDF). Civica. Retrieved 5 July 2019.
  89. ^ a b "Top 10 Networking Features in Windows Server 2019: #10 Accurate Network Time". Retrieved 2018-08-23.
  90. ^ "Openptp". Retrieved 2 June 2011.
  91. ^ "MEINBERG PTP Track Hound". Retrieved 2020-11-19.
  92. ^ "PPSi daemon". 12 May 2023.
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  94. ^ "The Linux PTP Project". Retrieved 13 October 2012.
  95. ^ "Timebeat - Open source synchronisation". Timebeat.
  96. ^ "FSMLabs time synchronization products". FSMLabs. Retrieved 21 November 2013.
  97. ^ "TSEP Chronos". Technical Software Engineering Plazotta. Retrieved 8 October 2019.
  98. ^ "NeEX - Next Generation Monitoring". Archived from the original on 2019-12-25. Retrieved 2019-12-25.
  99. ^ "DS31408 Web Page". Microsemi. Retrieved 4 Jun 2012.
  100. ^ "Qulsar C34 SOC". Retrieved 23 April 2014.
  101. ^ "Caracal-1 Carrier Ethernet Switch". Vitesse. Retrieved 21 September 2010.
  102. ^ "IEEE-1588 Timing over Packet". Zarlink. Retrieved 13 May 2011.
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  104. ^ "MAX24288 Web Page". Microsemi. Retrieved 4 Jun 2012.
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  106. ^ "BroadPTP". Retrieved 2020-11-09.
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  108. ^ "White Rabbit, a fully deterministic Ethernet-based network for general purpose data transfer and synchronization". OHR. Retrieved 3 March 2011.
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  110. ^ "Hoptroff Traceable Time as a Service". SyntacticSpice. Retrieved 23 February 2023.
  111. ^ "IEEE 1588 IP Core Module for FPGA". IXXAT. Retrieved 5 December 2012.
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  113. ^ "IEEE 1588 PTP IP Core". SoC-e. Retrieved 6 October 2011.
  114. ^ "IEEE 1588v2 Solution". Moxa. Retrieved 30 March 2011.
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  116. ^ "IEEE 1588 PTP Solutions". EndRun. Retrieved 27 July 2011.
  117. ^ "InES Institute of Embedded Systems, Zurich University of Applied Sciences". InES ZHAW. Retrieved 3 March 2011.
  118. ^ "IEEE 1588 PTP Solutions". Meinberg. Retrieved 27 July 2011.
  119. ^ "IEEE 1588 PTP Solutions". Microsemi. Retrieved 6 July 2010.
  120. ^ "IEEE1588 PTP FPGA Solutions". NetTimeLogic GmbH. Retrieved 12 December 2016.
  121. ^ "Product overview". Retrieved 5 March 2021.
  122. ^ "Syn1588 Product Range". Retrieved 13 February 2013.
  123. ^ "IEEE1588 solutions from Oscilloquartz". Retrieved 13 November 2015.
  124. ^ "Qulsar Website". Retrieved 23 April 2014.
  125. ^ "Precision Time Protocol (PTP) Grandmasters". Orolia. Retrieved 25 January 2019.
  126. ^ "IEEE1588 PTP solutions from Time & Frequency Solutions". Retrieved 25 June 2012.
  127. ^ "Time and Frequency". Retrieved 2018-06-10.
  128. ^ "IEEE 1588 and Synchronous Ethernet Clocks". IDT. Retrieved 4 Nov 2015.
  129. ^ "IEEE 1588-2008 Management Tool". IXXAT. Retrieved 5 December 2012.
  130. ^ "Polynet - Network synchronization - timing solutions". Polynet. Retrieved 23 July 2018.
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