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Unison GPS Network Time Server
Our Basic GPS Time Server
Provides Accurate and Reliable Network Time Inside Your Firewall
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The Unison is a standalone Stratum 1 time server that provides
an accurate, reliable and secure source of network time inside your firewall.
This model uses GPS as its time-synchronization source and it will
deliver accurate time throughout any system running an NTP or SNTP client.
- Supports 200,000 network clients with <10 microsecond NTP timestamp accuracy.
- Extended Stratum 1 operation if GPS signal is lost.
- NTP, SNTP, HTTPS (Web Interface), SNMP, SSH, SCP, MD5, TIME, DAYTIME, TELNET, FTP, DHCP and more.
- IPv4 and IPv6 compliant.
- Superior reliability - an MTBF of 25 years based on demonstrated field data.
- Options: Oscillator Upgrades, Alarm, Timecode, 1PPS, Pulse Rates, Sysplex, -48Vdc,
PTP/IEEE-1588 Grandmaster, and more.
Easy to Install and Maintain
Installation is done in just a few minutes using
either DHCP or by configuring the unit with a few simple keystrokes on the front-panel keypad/display.
Monitoring, maintenance and control is easily and securely accomplished via a
wide range of protocols including SNMP v3 and SSH.
Web Interface
Status monitoring can be easily accomplished by pointing your web browser to the Unison. Here is an example
of one of the status pages. You can also perform software upgrades with the Web Interface.
For security-conscious users, HTTPS can be completely disabled.
Network Security Hardened
Extra care has been taken with the Unison to "harden" it against network attacks.
There are only a small handful of settings that need to be made and they typically
need to be set only once in the lifetime of the product. Since this is a set-it-and-forget-it
box we have eliminated all extraneous protocols/services in order to minimize exposure to security
holes. You can change critical settings via SSH or Telnet and monitor the alarm/status
information by using HTTPS, SNMP, SSH or Telnet. Security-conscious
users can disable any of the risky protocols or restrict access to specific hosts.
Extended Stratum 1 Operation if GPS Signal Lost
If your GPS antenna is on the roof the
signal can be lost for several reasons, such as lightning strikes and damage
due to maintenance activities or vandalism. For window-mount antennas the signal is often missing
because of poor sky visibility. The Unison will continue to serve Stratum 1
time for a substantial period if the GPS reference signal is ever lost. This is
called the holdover period and it is dependent upon the quality of the oscillator and the quality of the
software control algorithms.
The standard Unison is provided with a TCXO. If the GPS signal is lost it will drift
away from perfect at the rate of 10 milliseconds during the first day.
This is the best
holdover performance of any time server on the market with a TCXO. For even
better holdover performance you may want to consider an oscillator upgrade. Oscillator
drift rates and Stratum 1 holdover periods are listed below:
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| TCXO |
10 milliseconds for 1st day |
24 hours |
| OCXO |
100 microseconds for 1st day |
35 days |
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Best Window-Mount Antenna Performance
If a rooftop antenna is difficult for you, then mounting your GPS antenna in a window is an option.
With our best-on-the-market holdover performance - your antenna only needs to see one
satellite once a day to continue serving accurate Stratum 1 time to your network.
Read about our other GPS-synchronized Time Server.
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Contact Us for Pricing
For pricing and information contact us between 7:30 am and 4:30 pm Pacific Time:
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1-877-749-3878
sales@endruntechnologies.com
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