IEEE-1588 PTP Grandmaster - DTS 4148

IEEE-1588 PTP Grandmaster - DTS 4148

DTS 4148 is a time reference for NTP and PTP clients in medium and large networks with up to 2 network ports (IPV4/IPV6). With its high-precision and intelligent concept for redundant operation, it offers a high degree of reliability and availability.

Oscillator type:OCXO
2 completely separated LAN ports (2x RJ45)provides PTP on both ports, multicast, IPv4/IPv6/Layer 2, provides NTP on both ports (<1'500 requests/s both ports combined)
Outputs:1x DCF/pulse/frequency output, 1x IRIG-B / AFNOR, 1x serial output, 1x DCF current loop output
High precision time:Time reception from GPS
Redundancy:master-slave operation with automatic switch over in case of an error
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IP configDHCP, static IPv4, IPv6
Power supply2 x DC input: 24 VDC +20 % / -10 % / max. 10 W, DC output: DC input voltage -2 V, max. 400 mA
AccuracyGPS (DCF input) to NTP server: typical < ± 100 µs / GPS (DCF input) to PTP server: typical < ± 10 µs / GPS (DCF input) to DCF 77 / pulse output: typical < ± 10 µs
OperationVia LAN: MOBA-NMS, Telnet, SSH, SNMP (special software necessary)
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Our tutorial videos will help you with the procedure for commissioning a DTS device in a network without dynamic IP address assignment DHCP. You will be shown how to make the settings on the DTS device and how to assign the IP address.


What is supplied by MOBATIME?

  • DTS device (e.g. DTS 4801.masterclock)
  • Rack mounting material
  • Terminal opener-tool


What do you need to be ready?

  • PC or Laptop
  • Switch
  • Serial cable (SUB.D9 pole, 0-modem (crossed))
  • USB Serial Adapter (only if you don’t have a serial input on your device)
  • Power cable
  • Network (LAN) cable


You need to download the following software:


Below you will find our six tutorial videos that will help you complete the initial installation:

  1. Identify PC COM Port
  2. Open PuTTY
  3. Configuration of DTS Menu IP in PuTTY
  4. Define PC/Laptop IP
  5. Add Single Device in MOBA-NMS
  6. Select synchronization source in MOBA-NMS

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.