Schools depend on everyone - teachers, paraprofessionals, other staff, plus, of course, the students - working on the same scheme. Traditionally this was done with the master / slave system clock.
Master clock in the office is set at the right time and the slave clocks in each class of automatic updates. However, a new type of school hours, which ties the computer network of schools, it turns out, has many advantages over the old system.
No Master Clock:
The principle of the clock generator is good, as long as the master clock is running. If the master stops the clock, all school hours to stop as well. The whole system of bells and class schedules are thrown into disarray. Network clock to get the correct time over computer networks of school. Typically, they ask the master for the school at that time.However, if that server is unavailable, they can ask any time server somewhere on the Internet.
Quick Update time:
School master clock updating of the secondary clock only once per hour. If a clock runs particularly slowly or quickly, it can read and the right time has not yet been fixed.Network clock can be set to request more often, so they can never drift more than 200 milliseconds of the correct network time.
Automatic Updates:
Time servers automatically adjust for daylight saving time, and all of the network clock to do the same. Is no longer someone has to manually change the clock. In addition, if there is a power failure, all the class hours will be updated as soon as power returns. In fact, they may be able to maintain the correct time of power failure due to the following features.
Power Over Ethernet (PoE):
clock network of schools do not get their power from the electrical outlet. They are powered through a computer network. This means that they can be installed in the new rooms are cheaper, because the school did not have to hire an electrician to run electrical cables. If the network backup UPS power, the clock will continue to show the correct time even in power failure.
Full integration:
School hours are no longer on its own system. They use the same servers, while any other network-based devices, including the school website. They are not only synchronized with each other, they are synchronized with any other clock that receives time signals over the Internet. Since most cell phones synchronize with the same signal, your students can not claim that they were late because their mobile phone clock reads differently than school hours!