Five Minute Facts About Packet Timing By Doug Arnold and Andreja Jarc A previous post discussed unicast PTP. Most PTP Profiles are based on multicast communication. However, PTP can operate using unicast. This is necessary in networks which don’t support multicast, or if there is a large number of PTP slaves, which would generate too […]
Search Results for: what are all these clock types
MIFID II Compliance: The Meinberg FAQ
By Heiko Gerstung. We receive an ever increasing number of questions from our customers regarding MiFID 2 and the time synchronzation of RTS 25 and therefore decided to publish the answers here in one place: 1. What is MiFID 2 ? The Directive on markets in financial instruments (MiFID 2) is an European regulation for […]
Messing with your Radio Time Signal
Last month two Chinese researchers gave a presentation titled “Time is on my Side” during the “Hack in The Box” 2016 SecConf event in Amsterdam, NL (https://conference.hitb.org/hitbsecconf2016ams/) . In this presentation, the researchers outlined a way to attack NTP servers by spoofing AM and GPS radio signals which are used as the time reference by most […]
PTP in networks without timing support
Five Minute Facts About Packet Timing By Doug Arnold. In an earlier post I described how boundary clocks and transparent clocks correct for timing errors in the network between the PTP grandmaster and PTP slaves. But what do you do if you don’t have boundary clocks or transparent clocks? What if you have a bunch […]
The PTP Telecom Profile for Frequency Synchronization
Five Minute Facts About Packet Timing By Doug Arnold. The Precision Time Protocol Telecom Profile for Frequency Synchronization was created by International Telecommunication Union, or ITU, for the transferring precise frequency through a packet switched network which does not have any support for PTP. Don’t let the name fool you though, you can transfer time […]
The IEEE 1588 Default Profile
Five Minute Facts About Packet Timing By Doug Arnold. As we’ve seen in previous posts, PTP has many optional features, and often more than one way to do things. This is what gives PTP its awesome flexibility to cover so many different kinds of applications. There is however a dirty secret behind this power: PTP […]
NTP vs PTP: Network Timing Smackdown!
Five Minute Facts About Packet Timing By Doug Arnold. I get asked a lot of questions from customers about network timing technology. Some of them are challenging to answer. However, one that I get all the time that is easy to answer is this: “Do I want NTP or PTP?” It all comes down to […]
One-step or Two-step?
Five Minute Facts About Packet Timing By Doug Arnold. One-step or two-step clocks for IEEE 1588? This is a question I hear a lot. If you are designing PTP enabled equipment, then it is a question, which has important ramifications for the architecture of your device. However, if you are buying PTP enabled equipment and […]