Meinberg NTP servers https://www.meinbergglobal.com/

1. Synchronization Solutions for
Financial Applications
Meinberg offers an extensive product range for synchronizing financial data
centers, trading solutions and analytical engines as well as transaction processing
systems. The high quality and performance level of the LANTIME and SyncFire
family ensure best-in-class synchronization accuracy and enable Meinberg
customers to optimize their latency measurement solutions and fulfill all legal
requirements concerning timestamp accuracy. Some of the worlds' largest
exchanges chose Meinberg as their primary supplier for synchronization solutions
based on Precision Time Protocol (PTP, IEEE 1588) and Network Time Protocol
(NTP) technology.
Multinational investment banks, asset management corporations, clearing houses,
data and listing services, derivatives and equity markets operators and participants
rely on Meinberg technology in all relevant financial centers in Europe, North
America, Asia/Pacific.

2. The Meinberg Intelligent Modular Synchronization platform provides an unmatched
level of flexibility, scalability and reliability, allowing the synchronization solution to
grow or adopt to new requirements whenever a new application needs a new level
of synchronization or an existing network has to change in order to fulfill changed
requirements.
NTP Time Server: LANTIME Stratum 1 Server for all Networks
LANTIME is Meinberg’s family of ready-to-run Network Time Protocol (NTP) server
appliances, ideal for synchronizing networks of any size. Choose between several
different external references sources such as globally available satellite systems
GPS, GLONASS, future planned also Beidou and Galileo, Central European DCF77
and IRIG.
Even if your desired installation location prevents consistent reception of external
signals, our highly stable, free running clocks can be deployed to keep your
network in sync. Add our NTP synchronized displays to create a fully-featured time
and synchronization solution optimized for environments such as control rooms or
operation centers.

3. The LANTIME family of NTP appliances is deployed in banks, insurance companies and other
financial networks and synchronizes millions of NTP clients like workstations, servers and
network equipment to optimize network performance, increase visibility of network states
and conditions and improves measurement and statistical record quality, allowing to better
plan network upgrades and reduce downtime and failures.
Leap Second Test:-
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 rotation. Since launching of the UTC time in the 1970’s, 16 leap
seconds have been inserted until now, and the 17th is added at the end of June.
The leap second is seen as an unpleasant discontinuity in the global time scale
as it causes an abrupt time jump which may provoke a lot of confusion for the
synchronized systems. Just imagine high speed trading algorithms where each
nanosecond difference is crucial to decide between high profits or loss. And if a
leap second appears within a trading day (e.g. UTC midnight + 9 hrs local time),
this particular additional second may be worth millions…
Anyway, it is important to be prepared. One of the approaches is to simulate the
leap second event in your testing environment and to check how different
devices handle the event.

4. Meinberg PROTOSIM Simulation
Software
We will introduce you to the Meinberg PROTOSIM Simulation Software which
can help to simulate a leap second in NTP and PTP networks.
Let us walk together through a possible test scenario. In MBGPROTOSIM we will
simulate an NTP server with a Leap Second insertion on June 30, 2015 after
23:59:59 UTC time and check how an NTP client handles the insertion.
After starting the MBGPROTOSIM tool, you can configure a new NTP-Server in
two steps as shown on the following figures 1 and 2.

5. Figure 1
Figure 1: To perform a Leap Second test, enable the Date Simulation and Leap
Second Simulation in the first page of the “Add Group” configuration dialogue and
set the start time of the simulation to June 30, 2015, shortly before midnight.

6. Figure 2
Figure 2: Set the correct NTP parameters at Step 2 for the simulated NTP Server.
For this test, the settings as shown above will do the right job for you.

7. Start the Simulation by pressing the “Run Simulation” button. Since the
simulation is now running this particular icon is faded out in the screenshot
below.
Figure 3

8. Figure 3: Simulated NTP server with the upcoming Leap Second insertion. In the
NTP Logs you can check if requests and responses between (real) NTP clients and
the simulated server have been successfully exchanged.
Now we have to check what is happening on the NTP client. For this test I used a
Win 8.1 laptop with running NTP 4.2.8p1 version. With the NTP Monitor tool for
Windows from Meinberg I see the following NTP status .
Figure 4

9. Figure 4: NTP Client sync to the simulated NTP server with the correct refid and
other parameters as configured in MBGPROTOSIM.
Please note that the Windows client will actually set its date to June 30, 2015. If
you later reset the clock to the correct date, any files and timestamps that have
been created during the tests will be in the future. This can cause problems with
a lot of programs like email clients (recording the arrival date/time of mail
messages), databases (using timestamps to indicate changed data records) and
so on.
I therefore strongly recommend to not use a client system that has important or
useful data on it . If that is not possible, quit all other programs and stop all
services not required for this test and avoid creating / modifying files during the
period in which your test system is synchronized to the simulated server. As
always, creating a back up is a good idea and crucial to avoid data loss.
I check now the NTP timing sequence between a client and the server in
Wireshark (a helpful network analyzing tool, you can get it for free from
Wireshark).

10. Figure 5
Figure 5: NTP packets exchange between a client and server a few minutes prior the Leap
Second event. Please note that the LS indicator flag is correctly set to 01. This is an
announcement bit which activates the Leap Second handling in NTPD on the client when a
Leap Second is inserted.

11. After the fact you can check whether the client correctly inserted
the leap second. Just a quick check from the Event Viewer perspective.
Figure 6
Figure 6: We see here that a positive leap second has been successfully inserted
in the client.

12. Let us check the content of the NTP packets again. Is there any difference in the
packet sequence between a client and server?
Figure 7
Figure 7: As you can notice, the LS Flag is now set back to normal “00” which
implies that no Leap Second is announced.
This is one of the possible tests to see how an NTP client handles the announced
Leap Second event.

13. Meinberg Products for Finance &
Trading
• LANTIME M-Series: M300, M600 (Gigabit Interfaces)
• LANTIME IMS Series: M1000, M3000
• PCIe Slotcards for PTP and GPS

14. LANTIME M300: NTP Server in 1U Case
for Server Rackmount
The Meinberg LANTIME M300 time server provides accurate time to networks of
any size. It synchronizes all NTP- or SNTP-compatible systems. The M300 time
server uses as a reference time source either any compatible external or built-in
Meinberg reference clock (Stratum 1 mode) or up to 7 NTP servers (Stratum 2
mode).
LANTIME M300 Physical Dimensions NTP server backplane with programmable
pulse outputs and RS232 COM port

15. Key Features of LANTIME M300
• Selectable Reference Time Sources:
1. GPS: Satellite receiver for the Global Positioning System
2. GNS: Combined GPS/GLONASS/Galileo/BeiDou satellite receiver (L1 frequency
band), can also be used for mobile applications
3. PZF: DCF77 correlation receiver for middle europe
4. MSF: Long wave receiver for Great Britain
5. WWVB: Long wave receiver for the US time signal
6. TCR: Time code receiver for IRIG A/B, AFNOR or IEEE1344 codes
7. MRS: (GPS, PPS, 10MHz, NTP): Multi Reference Source - several reference
sources, adjustable following priority of signal
8. RDT: (external PPS or NTP): Time Server without internal receiver module
• Synchronization of NTP and SNTP compatible clients
• Web-based status and configuration interface (Demo) and console-based
graphical configuration utility

16. • Supported net protocols: IPv4, IPv6, NTP, (S)NTP, DAYTIME, DHCP, HTTP, HTTPS,
FTP, SFTP, SSH, SCP, SYSLOG, SNMP, TIME, TELNET
• Alert-Notification system of status change by Email, Win Mail, SNMP or an
external connected display.
• Full SNMP v1,v2,v3 support with own SNMP-daemon for status and configuration
and SNMP Trap messages
• USB Port for installing firmware updates, locking front panel menu access and
backup/restore of configuration and log files
• Meinberg GPS Antenna/Converter Unit connected with up to 300m of standard
coaxial cable RG58
• Meinberg's LANTIME time server is available with a variety of additional output
options: IRIG Time Code, frequency synthesizer and programmable pulse outputs
illustrate some of the many expansion options for your NTP server
• Two (standard) or optional up to six independent RJ-45 Ethernet interfaces 10/100
Mbit.
NTP server M300 with different receiver options (GS,WWVB,MSF...) Rear view M300RDT NTP Time Server with
1 x 10/100 Mbit and 3 x10/1000 Mbit Ethernet

17. LANTIME M600: High End NTP Time Server
The Meinberg LANTIME time server is used around the world to provide accurate
time to networks of any size. It synchronizes all systems either NTP- or SNTP-
compatible and uses an integral Meinberg reference clock as its time source to
synchronize all timing outputs with the utmost accuracy. The front panel includes a
VF Display and keypad for easy configuration, and indication of the receiver and
NTP subsystem status. A high quality precision OCXO is standard in the M600, to
allow this time server to meet the stringent holdover requirements.
LANTIME M600 Physical Dimensions LANTIME M600 with VFD,menu buttons,
status LED's and the serial Console port and front USB port

18. Key Features of LANTIME M600
• Selectable Reference Sources:
1. GPS: Satellite receiver for the Global Positioning System
2. GNS: Combined GPS/GLONASS/Galileo/ BeiDou satellite receiver (L1 frequency band), can also be
used for mobile applications
3. MRS: (GPS, PPS, 10MHz, NTP): Multi Reference Source - several reference sources, adjustable
following priority of signal
Optional Time Source GNS - GPS / GLONASS / Galileo / BeiDou Receiver:
The GNSS satellite receiver clock has been designed to provide extremely precise
time to its user. The clock has been developed for applications where conventional
radio controlled clocks can't meet the growing requirements in precision. High
precision available 24 hours a day around the whole world is the main feature of
the new system which receives its information from the satellites of the American
GPS (Global Positioning System), the Russian GLONASS (Global Navigation Satellite
System), the European Galileo and the Chinese BeiDou navigation service.
This GNSS receiver can be configured to use up to three GNSS constellations at the
same time: besides GPS and GLONASS, Beidou and Galileo are also available.

19. Key Features of LANTIME M600
• Selectable Reference Sources:
1. GPS: Satellite receiver for the Global Positioning System
2. GNS: Combined GPS/GLONASS/Galileo/ BeiDou satellite receiver (L1 frequency band), can also be
used for mobile applications
3. MRS: (GPS, PPS, 10MHz, NTP): Multi Reference Source - several reference sources, adjustable
following priority of signal
Optional Time Source GNS - GPS / GLONASS / Galileo / BeiDou Receiver:
The GNSS satellite receiver clock has been designed to provide extremely precise
time to its user. The clock has been developed for applications where conventional
radio controlled clocks can't meet the growing requirements in precision. High
precision available 24 hours a day around the whole world is the main feature of
the new system which receives its information from the satellites of the American
GPS (Global Positioning System), the Russian GLONASS (Global Navigation Satellite
System), the European Galileo and the Chinese BeiDou navigation service.
This GNSS receiver can be configured to use up to three GNSS constellations at the
same time: besides GPS and GLONASS, Beidou and Galileo are also available.

20. The GNSS board has several different optional outputs, including programmable
pulses, modulated / unmodulated time codes and RS232 COM ports, depending
on the hardware configuration.
Satellite receiver for mobile applications:
The GNSS timing board is designed for operating in mobile environments like cars,
trains or airplanes. An optimized active L1 antenna RV-76G with 10 meters coax
cable RG-58 for operation in mobile environment is still available.
The GNSS satellite receiver can determine its position under the following
conditions:
1. an acceleration of up to 5G
2. a speed of up to 500 m/s
3. an altitude of up to 18,000 meters
The variety of inputs/outputs makes this receiver the first choice for a broad
range of applications, including time and frequency synchronization tasks and the
measurement of asynchronous time events.

21. Technical specifications of the combined GPS / GLONASS receiver:
1. Number of channels: 72
2. Frequency band: L1
3. Standard accuracy: GNSS
Accuracy of pulses (depends on oscillator option):
• < ± 100ns (TCXO, OCXO LQ)
• < ± 50ns (OCXO MQ, OCXO HQ, OCXO DHQ)
Type of antenna: Combined GPS/GLONASS antenna
• Antenna with integral surge voltage protection
Frequency band:
1. GPS: 1575.42 ± 10 MHz
2. GLONASS: 1602-1615 MHz
3. Galileo: 1542.5 MHz
4. BeiDou: 1561.09 MHz
• Antenna gain: ≥ 3.5 dBic / ≥ 3 dBic
• Supply Voltage: 5 V
• Nominal impedance: 50 ohms
• Connector: N, female (bottom)
• Maximum length of antenna cable (without amplification): 70 meters (type Belden
H155)

22. • Synchronization of NTP and SNTP compatible clients
• Web-based status and configuration interface (Demo) and console-based
graphical configuration utility
• Supported networking protocols: IPv4, IPv6, HTTPS, HTTP, SSH, TELNET, SCP,
SFTP, FTP, SYSLOG, SNMP
• Alert-Notification system of status change by Email, Win Mail, SNMP or an
external connected display
• Full SNMP v1,v2,v3 support with own SNMP-daemon for status and
configuration and SNMP Trap messages
• USB Port for installing firmware updates, locking front panel menu access and
backup/restore of configuration and log files
• Meinberg GPS Antenna/Converter Unit connected with up to 300m of standard
coaxial cable RG58
• Meinberg's LANTIME time server is available with a variety of additional output
options: IRIG Time Code, frequency synthesizer and programmable pulse
outputs illustrate some of the many expansion options for your NTP server
• Four independent network interfaces (standard configuration)
• Option: 5 network ports and one IEEE 1588 interface (also see PTPv2
Grandmaster)
• One 10/100 MBit interface for LANTIME management and three network ports
with Gigabit Support (3GE)

23. IMS - LANTIME M1000: Time and Frequency
Synchronization Platform in 1U Rackmount-Enclosure
Versatile and Modular Solution for Time and Frequency Synchronization
Application in 1U housing
The 1U chassis has two power supply slots, optional two clock module slots, a CPU
slot and four (three in case of a second reference clock) slots for additional input
and output modules. Adding a second clock module and a second power supply
transforms the IMS - M1000 into a fully redundant solution. Both, wide range AC
and a 20-72 VDC power supply model can be mixed and matched as required.

24. Key Features of LANTIME M1000
Rear view LANTIME M1000 with redundant power Supply
• Optimized space usage.
• Synchronization of NTP and SNTP compatible clients.
• Web-based status and configuration interface,and console-based graphical configuration
utility.
• IMS - Intelligent Modular System platform.
• Up to 4 PTP (IEEE 1588-2008) modules.
• Redundant power and receiver option (eg GPS / GLONASS combination).
• Hot Plug.
• Arbitrary combinations of modules.
• Meinberg's LANTIME time server is available with a variety of additional output options:
IRIG Time Code, frequency synthesizer and programmable pulse outputs illustrate some
of the many expansion options for your NTP server.
• Up to 16 additional LAN ports.

25. IMS - LANTIME M3000: Versatile and Modular
Time and Frequency Synchronization Platform
The new LANTIME M3000 is a field-upgradeable and extremely flexible system that
covers your synchronization needs - today and in the future.
The M3000 chassis has four power supply slots, two clock module slots, a seamless
switchover card slot, a CPU slot and ten slots for additional input and output
modules. Adding a second clock module and the required RSC switch module will
turn the M3000 into a fully redundant solution. Up to four power supplies can be
installed, offering protection against the failure of one or more power sources or
power supply failures. Both wide range AC and a 18-72VDC power supply model
can be mixed and matched as required.

26. The possibility to add input and output modules as well as specialized
communication cards for NTP and PTP/IEEE1588 network synchronization and
remote management ensures that a LANTIME M3000 will fulfill all your
synchronization requirements and the scalability and flexibility of the IMS platform
concept enables it to cope with the changing demands of your critical applications.
Key Features of LANTIME M3000
Front cover of the M300- easily retrofitting of an ACM module M3000 in redundant Configuration (receiver and power supplies)
• Optimized space usage.
• Synchronization of NTP and SNTP compatible clients.
• Web-based status and configuration interface (Demo), and console-based graphical
configuration utility.

27. • IMS - Intelligent Modular System platform.
• Up to 10 PTP (IEEE 1588-2008) modules.
• Redundant power and receiver option (eg GPS / GLONASS combination).
• Hot Plug.
• Arbitrary combinations of modules.
• Replacement or retrofitting of an ACM module (Active Cooling Module)
possible during operation.
• Meinberg's LANTIME time server is available with a variety of additional
output options: IRIG Time Code, frequency synthesizer and programmable
pulse outputs illustrate some of the many expansion options for your NTP
server.
• Up to 40 additional LAN ports.
Input and output XHE- Rubidium Expansion Chassis
modules-easy accessible on the rear panel of the system