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IEEE-1588 PTP Grandmaster - DTS 4150

Front view of the MOBATIME DTS 4150 Grandmaster Clock with a focus on its robust construction and interface
Front view of the MOBATIME DTS 4150 Grandmaster Clock with a focus on its robust construction and interface Mobatime DTS 4150 timer server  back view, PTP NTP SyncE DCF Side profile of the MOBATIME DTS 4150 Grandmaster Clock showcasing its ports and connectivity options Side view of the MOBATIME DTS 4150 Grandmaster Clock, essential for precise time distribution networks Mobatime DTS 4150.Grandmaster ports Detail back, NTP PTP SyncE, DCF

IEEE-1588 PTP Grandmaster - DTS 4150

DTS 4150 is a combined time distribution and synchronization device with up to 4 network ports (IPv4/IPv6). With its high-precision and intelligent concept for redundant operation, it offers a high degree of reliability and availability.

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PTP GRANDMASTER
The DTS 4150 is a PTP grandmaster according to IEEE 1588-2008 / PTPv2, with IEEE 1588-2019 / PTPv2.1 compability, for the synchronization of highly accurate clients. Usable for data centers, energy (e.g. smart grid), automation etc.

HIGH-PERFORMANCE NTP SERVER
The DTS 4150 can reply to more than 10‘000 NTP and SNTP requests per second (up to 600‘000 clients depending on NTP client configuration).

REDUNDANT LINK
For utmost availability, two DTS 4150 can be connected to offer redundant master-slave operation with automatic switch over in case of an error.

GNSS RECEIVER
The DTS 4150 can receive all GNSS L1 systems (GPS+QZSS/SBAS, Galileo, GLONASS, BeiDou). Additional IRNSS/NavIC L5 support available on request.

NETWORK SERVICES
The DTS 4150 offers state-of-the-art network services such as VLAN, link aggregation, and static routing.

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Oscillator type:TCXO
4 completely separated LAN ports (3x RJ45, 1x SFP):Provides PTP on 3 ports 1- and 2-step master or slave, different profiles and domains per port, multicast/unicast, IPv4/IPv6/Layer 2, provides NTP on 4 ports (<10’000 requests/s on all 4 ports combined)
Outputs:1x DCF current loop output
GNSS Receiver:GNSS L1 systems (GPS+QZSS/SBAS, Galileo, GLONASS, BeiDou). Additional IRNSS/NavIC L5 support available on request.
Redundancy:Master-slave operation with automatic switch over in case of an error
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IP configDHCP, DHCPv6, static IP, Autoconfiguration
Power supplyRedundant power supply, Supply 1 (standard mains connector for 240VAC), Supply 2 (22..29 VDC)
AccuracyGNSS to internal time: typ. < +/- 30ns / GNSS to NTP: typ. < +/- 100µs / GNSS to PTP: typ. < +/- 250ns / GNSS to DCF: typ. < +/- 5µs / SyncE: compatible
OperationMOBA-NMS, Telnet, SSH, SNMP (V1/V2c/V3 get, put), RS 232 (terminal)
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Both, PTP and NTP provides time synchronization over a packet based network. But not both protocols are dedicated to the same application fields. It depends on the system’s needs, which of the protocol is preferred.

PTP is needed where a higher level of precision is required (e.g. Telecom, Power distribution, Air traffic control etc.) With PTP sub microsecond or even nanosecond accuracies are feasible, whereas NTP only reaches millisecond level. The key of PTP is hardware timestamping. Only if the timestamping happens close to the wire, it is possible to reach this high level of accuracy. The drawback of it is the need for dedicated hardware and an engineered network.

NTP is an old Internet protocol which is still widely used to distribute time (e.g. clock systems or IT Networks). NTP provides a simple way to synchronize all device over a regular network and even over internet. To ensure a reliable time in a local network, the best solution is to place an NTP server, which is connected to a GNSS Antenna, into the network. Whereas time is needed for clocks, access control systems and other such systems the accuracy of NTP is sufficient. The benefit of NTP is it’s robustness and it’s ability to run on a standard IT equipment.

If you need further information on this topic, please do not hesitate to contact us. We would be pleased to support you.

PTP is the “Precision Time Protocol”, which is defined in IEEE 1588. In contrast to NTP, this is a network protocol, which is characterized by significantly higher accuracies (down to the nanosecond range) and is usually used in locally limited networks (e.g. measurement / control / regulation technology, automation technology, etc.).

 

In the foreground is not the absolutely correct time information, but rather the high-precision “clocking” of interconnected devices in such industrial or computer networks. In connection with the PTP network organization and clock types, one speaks initially of Grandmaster Clocks (best possible reference device) and Boundary Clocks (devices with master and slave function), whose role distribution is determined using the best Master Clock algorithm. On the other hand, clearly defined roles are assigned to the ordinary clocks (either as master or clients), so-called transparent clocks then only forward the PTP time stamp when corrected. The runtime correction is ensured using complex computing algorithms. So it is not the case that one procedure is to be replaced by the other: NTP and PTP have different functional focuses, which is why both will continue to have authorization in the future and can also be used in parallel in computer networks if necessary.

Selected MOBATIME time servers can support IRNSS/NavIC L5 as an additional GNSS reception option.

For the DTS 4150.grandmaster and DTS 4160.grandmaster, IRNSS/NavIC L5 support is available on request. Both devices are designed for professional time distribution and synchronization and can receive the main GNSS L1 systems listed in the product leaflets, including GPS, Galileo, GLONASS and BeiDou.

Whether IRNSS/NavIC L5 is relevant for a specific project depends on the application, regional signal availability and system requirements. For this reason, we recommend checking the exact configuration and project conditions in advance.

IRNSS/NavIC is a regional satellite navigation system, while GPS, Galileo, GLONASS and BeiDou are global navigation satellite systems.

This means that NavIC is mainly designed to serve India and the surrounding region. In time synchronization projects, it can be relevant when regional GNSS availability, project specifications or local requirements need to be considered as part of the overall synchronization concept.

PTP profiles are standardized sets of configuration parameters tailored to specific industries or use cases. For example:

  • The Power Profile (IEC 61850-9-3) is used in substations and utility automation, prioritizing reliability and deterministic behavior.
  • The Telecom Profiles (ITU-T G.8275.1 and G.8275.2) are used in mobile networks for phase and frequency synchronization.

These profiles ensure interoperability and simplify deployment within each domain.

The Precision Time Protocol (PTP), defined by IEEE 1588, is a network protocol that synchronizes clocks throughout a network with sub-microsecond accuracy. It is critical in applications where precise timing is essential, such as energy systems, industrial automation, financial trading, and broadcasting. PTP achieves this high accuracy through hardware timestamping and delay compensation techniques.