Personal tools
You are here: Home Products Accurate time & frequency systems NTP time server
NTP time server
Lantime M300/GPS - NTP Time Server

General description

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 a built-in Meinberg GPS radio clock as its reference time source. A highly stable and precise oscillator is capable of bridging interferences or a temporary loss of reception.


Key features

  • Synchronization of NTP and SNTP compatible clients
  • Web based status and configuration interface 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, WinMail, 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 in the front panel to perform updates, to authenticate, save configuration and log files.
  • Antenna connected with up to 300m of standard coaxial cable RG58
  • Two independant RJ-45 ethernet interfaces 10/100 MBit

Detailed description

The GNU/Linux operating system of the LANTIMEs SBC (Single Board Computer) has been optimized to ensure a high level of security and reliability.
A large LC display shows the state of the internal GPS receiver and the NTP subsystem. Three LEDs (green/red) indicate the status of the three main components: Reference Time (GPS), Time Synchronization Service (NTP) and Network (Link status). A fourth red LED is labelled ALARM and can be configured to signal any event that is covered by the notification handling routines.
The configuration of the system can be done by using a standard web browser for accessing the extensive but straightforward html interface. Alternatively a text based and menu driven setup utility can be started from the shell prompt after logging into the unit via Telnet or SSH.
The security-related features of LANTIME time servers satisfy highest demands. The time synchronization data can be reliably signed and secured by symmetric keys (MD5) and the NTP autokey procedures. This protects the clients against manipulated time and man-in-the-middle attacks and allows them to verify that the NTP packets they received were send by the LANTIME. Additionally the whole LANTIME configuration can be done by using encrypted channels (e.g. SSH, HTTPS or SNMPv3). Every unused/unneeded protocol can be disabled in order to reduce possible points of attack.
In order to support network management systems the LANTIME time servers offer an extensive SNMP interface, which can be accessed by SNMP V1, V2.c and V3. It allows the monitoring of all relevant system parameters (including operating system parameters, network interface statistics, detailed GPS and NTP status information as well as the complete system configuration) and can be used to alter the LANTIME configuration via SNMP set commands, too.
LANTIME time servers are designed to be deployed in IPv6 networks, the NTP time synchronization as well as the configuration interfaces (Web-based, SSH and SNMP) comes with IPv6 support. You can assign several IPv6 addresses and the system supports automatic configuration by IPv6 autoconf.
The LANTIME M300 GPS is equipped with high precision oscillator "TCXO" as standard. The oscillator determines the holdover characteristics (e.g. when the GPS signal is disturbed or jammed). For applications with higher accuracy requirements there are several oscillator options available.
Because of its modular system architecture it is possible to equip a LANTIME M300 time server with a number of different reference time sources. Optionally several additional frequency-, serial string- and pulse outputs are available and by combining two (even different) time sources and redundant power supplies, high-availability systems are no problem.

Technical data

Type of receiver: 12 channel GPS C/A-code receiver
 Form Factor: 19" module case, height: 44.5mm (1U), width: 483mm (84HP), depth: 350mm
Type of antenna: Remote powered GPS antenna/converter unit, up to 300m distance to antenna with RG58 and up to 700m distance with RG213 cable
 Display: LC-display, 2 x 40 characters, with backlight
Control elements: Eight push buttons to set up basic network parameters and to change receiver settings
Status info: Four bicolor LEDs showing status of:
  • reference time
  • time service
  • network
  • alarm
Frequency outputs: 10 MHz via female BNC connector, TTL into 50 Ohm
Accuracy depends on oscillator (standard: TCXO)

Pulse outputs: second impulse (TTL-level), impulse length: 200ms Accuracy of pulse outputs: Depends on oscillator option:
< ±100ns (TCXO, OCXO LQ)
Data format of interfaces:
Baudrate: 300, 600, 1200, 2400, 4800, 9600, 19200
Baud data format: 7N2, 7E1, 7E2, 8E1, 8N1, 8N22 
Time telegram: Meinberg Standard-Telegram, SAT, Uni Erlangen (NTP), SPA, NMEA0183 (RMC), COMPUTIME or capture-telegramm
Alarm output:
Synchronous state of the module, relay output (changeover contact)
Network Interface:
2 x 10/100 MBit with RJ45
Universal Serial Bus (USB) Ports:
1x USB Port in front panel:
  • install firmware upgrades
  • backup and restore configuration files
  • copy security keys
  • lock/unlock front keys
Network protocols OSI Layer 4 (transport layer): TCP, UDP
Network protocols OSI Layer 7 (application layer): TELNET, FTP, SSH (vključno SFTP, SCP), HTTP, HTTPS, SYSLOG, SNMP
Internet Protocol (IP): IP v4, IP v6
Network Autoconfiguration Support: IPv4: Dynamic Host Configuration Protocol - DHCP (RFC 2131) IPv6: Autoconfiguration Networking - AUTOCONF
Network Time Protocol (NTP):
NTP v2 (RFC 1119), NTP v3 (RFC 1305), NTP v4 (no RFC) SNTP v3 (RFC 1769), SNTP v4 (RFC 2030) MD5 Authentication and Autokey Key Management
Time Protocol (TIME): Time Protocol (RFC 868)
Daytime Protocol (DAYTIME): daytime Protocol (RFC 867)
IEC 61850:
Synchronization of IEC 61850 compliant devices by using SNTP
Hypertext Transfer Protocol (HTTP): HTTP/HTTPS (RC 2616)
Secure Shell (SSH):
SSH v1.3, SSH v1.5, SSH v2 (OpenSSH)
Telnet (RFC 854-RFC 861)
Simple Network Management Protocol (SNMP): SNMPv1 (RFC 1157), SNMPv2c (RFC 1901-1908), SNMP v3 (RFC 3411-3418)
Power supply: 100-240 V AC, 50/60 Hz
Ambient temperature: 0 ... 50°C / 32 ... 122°F
Humidity: Max. 85%
Scope of supply: Included in delivery is our GPS antenna incl. converter unit, 20m GPS antenna cable (RG58) and a printed manual.
Additional Information: More informations about the Meinberg LANTIME family of NTP time servers and other LANTIME models can be found on the LANTIME NTP Time Server Family Page.


Document Actions