The SEIKO Precision Time Server TS-2540, the 6th generation SEIKO time server product, is configured and designed for highly accurate time synchronization down to +/- 1 millisecond (msec) and ease of use in Computer networks with up to thousands of clients. By utilizing the built-in 12-channel GPS receiver, every visible satellite can be tracked and used for time synchronization. The internal SEIKO Precision Quartz Oscillator will keep the accurate time in case of a satellite signal loss and within an accuracy of +/- 10 milliseconds per day.

The TS-2540 provides an internal web interface for easy setup through the network and via the browser, Reliable and secure network synchronization technology by combining multi-port, high-speed/high Capacity network interfaces and versatile GPS timing receiver technology. It supports a wide range of Protocols including IPv4 and IPv6 for seamless integration into your existing and future networks. The TS-2540 has two dedicated and physically isolated 10/100 Base-T Ethernet ports - each with its own Processor - providing the flexibility of using independent ports for secure network maintenance and NTP timing functionality. Automatic leap second and daylight savings time adjustment is user selectable.

1. What is Time Server?
2. Why the systems need network timekeeping?
3. About TS-2540
4. Application of TS-2540

Time Server is:      

1. Precision time resource of closed network.
2. Using NTP3/4 synchronize computers.
3. Getting UTC from GPS.
4. Easy operation for setting and installation.

With poor timekeeping

1. You have a risk of data loss.
2. Scheduled applications don't work sometimes.
3. Some security holes may exist in your system.
4. You couldn't make correct digital signature.

As the result of these troubles you have a risk that you lost credibility in the market place.

In these situation data loss may be occur with poor timekeeping.

1. Use document management engines.
2. Use the distributed database at web site.
3. Use network file system in the Groupware.
4. Use software development system

- Simple example of document managing system

Scheduled applications and relative tasks don't work well in a following situation.
1/ some applications run on the event that will be occurred from the schedule of other machines.
2/ in the distributed computing environment, some tasks run at other machines are relative each other.

1. If you would like to raise a security level of your company you should take the digital signature and digital time stamp into your systems. And it is necessary to synchronize all computer time.
2. Almost digital signatures have a short validity. So you must check the expiration date every time you accept digital signature.
3. For the same reason you must be careful at "time" if you use private CA and publish digital signatures.
   • If you want to prove that the document has not been tampered with.
   • When document was tamped.
4. You should use digital time stamp synchronized with UTC.
   

• Hospitals
• Schools
• Government Departments
• Financial Market system
• Factories