Five Minute Facts About Packet Timing By Doug Arnold A network architect’s job is never done. It is not enough to design the network, and see that design implemented. You need to keep checking to make sure that everything still works as the network evolves. It’s certainly true for your network-based timing system. First remember […]
Time of Day, Phase and Frequency – select your source
By Andreja Jarc. Time can mean many things. For purpose of synchronization, we are trying to determine a sequence of events or we want to compare how long an event lasts. Usually we are talking about the Time of Day (ToD), which represents a “wall clock time” – a specific time with hours, minutes, seconds […]
Multi Reference Clock – IRSA
By Andreja Jarc. You have probably already heard about a Multi Reference Clock Source from Meinberg, commonly referred as an MRS. What is it about? This is a receiver that can use other input signals in addition to GNSS to synchronize the system. Therefore its name: Multi- Reference- Source. The reference signals commonly used may […]
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 […]
NTP Security and Protection
By Andreja Jarc. Synchronized timing is vitally important when many systems work together in a network. Services such as Logfiles, Correlation of Events, User Authentication Mechanisms, Job Scheduling e.g. for backups or Active Directories running on distributed platforms use accurate timestamps to record events in chronological order and to avoid conflicts with data replication. Without […]
Leap Second Test
By Andreja Jarc. The timing industry is anxiously waiting for the unavoidable Leap Second Insertion which is announced for this year on June 30, 2015 at UTC midnight. The Leap Second has been introduced by The International Earth Rotation Service (IERS) in order to keep up the relationship between the UTC time and the Earth […]
NTP Monitoring
By Andreja Jarc. Introduction Meinberg LANTIME servers with a fw 6.17.004 or higher are enhanced with a new NTP monitoring feature. This feature enables monitoring of NTP performance of up to 100 external NTP nodes (servers and clients) attached in a local or public network. NTP values, such as offset, delay and jitter are queried regularly from […]
Measuring Asymmetric Delay in the networks
By Andreja Jarc. Finally good news on the subject of measuring asymmetric delays in LAN and WAN networks using packet timing technologies. Meinberg Radioclocks provides a reliable solution for measuring asymmetry in NTP as well as IEEE 1588 PTP environments using a LANTIME server equipped with a Multi Reference Source (MRS) receiver. MRS is a special reference clock which […]
Using SNMP to Manage Network Time Servers
By Andreja Jarc and Doug Arnold. The Simple Network Managment Protocol Most network connected devices support a number of management options including the Simple Network Management Protocol, or SNMP. SNMP is a network protocol which allows a single network management system to monitor a large number of devices on the network. Indeed this is one […]