Meinberg offers some standard types of NTP time servers which meet a wide range of requirements in network time synchronization. Additionally, individual time server solutions can be assembled depending on the customer's specific requirements. Examples for customized solutions can be found in the table below.
Standard Options: LANTIME NTP Time Server
NTP Time Server |
M320 NTP Server flat 19" / 1U chassis |
Railmount Time Server for switch cabinet |
Modular NTP Time Server 19" / 3U chassis |
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Time Server Functions |
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NTP Server | Standard Feature |
Standard Feature |
Standard Feature |
NTP Broadcasts | Standard Feature |
Standard Feature |
Standard Feature |
NTP Client for additional NTP Server (Redundancy) | Standard Feature |
Standard Feature |
Standard Feature |
NTP SNTP Server | Standard Feature |
Standard Feature |
Standard Feature |
NTP MD5 Encoding | Configurable |
Configurable |
Configurable |
NTP Access Restrictions | Configurable |
Configurable |
Configurable |
RFC-868 TIME Server | Standard Feature |
Standard Feature |
Standard Feature |
RFC-867 DAYTIME Server | Configurable(siehe #1) |
Configurable(siehe #1) |
Configurable(siehe #1) |
Possible NTP Client Sync. Accuracy (rps = NTP requests per second) |
1-10 ms up to 6,000 rps |
1-10 ms up to 6,000 rps |
1-10 ms up to 6,000 rps |
Network Connection |
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Ethernet 10/100Base-T | Standard Feature |
Standard Feature |
Standard Feature |
FDDI | Option |
Option |
Option |
TCP/IP Network Protocols |
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HTTP(S) | Standard Feature |
Standard Feature |
Standard Feature |
IEEE 1588 - FTP | Standard Feature |
Standard Feature |
Standard Feature |
DHCP | Standard Feature |
Standard Feature |
Standard Feature |
Telnet | Standard Feature |
Standard Feature |
Standard Feature |
SSH | Standard Feature |
Standard Feature |
Standard Feature |
SNMP Traps with MIB | Standard Feature |
Standard Feature |
Standard Feature |
User Interface / Management |
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Keypad / LC- or VF-Display | Standard Feature |
Standard Feature |
Standard Feature |
Status LEDs | Standard Feature |
Standard Feature |
Standard Feature |
HTTP Statistic Pages | Standard Feature |
Standard Feature |
Standard Feature |
HTTP Control | Standard Feature |
Standard Feature |
Standard Feature |
Telnet Login | Standard Feature |
Standard Feature |
Standard Feature |
SSH Login | Standard Feature |
Standard Feature |
Standard Feature |
RS-232 Terminal | Standard Feature |
Standard Feature |
Standard Feature |
Email Notification at pre-defined Events |
Standard Feature |
Standard Feature |
Standard Feature |
SNMP Traps send at pre-defined Events |
Standard Feature |
Standard Feature |
Standard Feature |
Syslog Messages redirect to external Syslog-Sever |
Standard Feature |
Standard Feature |
Standard Feature |
Security |
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Network Locking | Standard Feature |
Standard Feature |
Standard Feature |
Keypad Locking | Option |
Option |
Option |
RS-232 Locking | Option |
Option |
Option |
Options for single Time References |
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GPS (12-Channel) | Standard Feature |
Standard Feature |
Standard Feature |
GNSS (L1 72-Channel) | Option |
Option |
Option |
GPS optional: Rubidium Extension |
extra Chassisextra Chassis |
extra Chassisextra Chassis |
extra Chassis oder M900M900 or extra Chassis |
DCF77 | Option |
Option |
Option |
IRIG | Option |
Option |
Option |
Time String via RS-232, PPS | Option |
Option |
Option |
Options for multiple redundant Time References |
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GPS + DCF77 or IRIG | Option |
not available |
Option |
GPS + Rubidium + DCF77 or IRIG | not available |
not available |
Option |
DCF77 PZF + IRIG | not available |
not available |
Option |
Additional Outputs and Output Signals |
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Pulse Per Second (PPS) | Standard Feature |
Standard Feature |
Standard Feature |
10MHz Frequency Output | Standard Feature |
Standard Feature |
Standard Feature |
Pulse Per Minute (PPM) | Option |
Option |
Option |
2.048 MHz Frequency Output | Option |
Option |
Option |
IRIG | Option |
Option |
Option |
Error Output | Standard Feature |
Standard Feature |
Standard Feature |
Serial Time String via RS-232 | Standard Feature |
Standard Feature |
Standard Feature |
Miscellaneous |
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Redundant Power Supply | Option |
Not Available |
Option |
Form Factor | 1U Rack | Alu-Case | 3U Rack |
1 The Daytime service is intentionally turned off because it is poorly suited for time synchronization. The service can be unlocked. |
Customized Time Server Solutions
Zusätzlich zu den Standard Timeservern baut Meinberg auch kundenspezifische Versionen. Zum Beispiel: In addition to standard time servers, Meinberg also produce customer-specific systems. For example:
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SHS (Secure Hybrid Systems)
Two independent sources of time (i.e. GPS and DCF77) can be examined and supervised by a monitoring circuit. If the plausibility is ensured, the examined time is handed over to a NTP time server, which distributes the reference time to the network clients.
If the plausibility check fails then the supervisory circuit raises an alarm signal and disconnects both time sources from the NTP server to prevent the NTP server from distributing a spoofed time.
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Example: Secure NTP Time Server
A redundant set of time sources which feed several individual NTP time servers on different isolated networks. For security reasons there's no router between the individual networks but the same reference time is a available in the networks.