Network Timing & GPS

 

 

Network Synchronization is the means of ensuring that the signals of an entire digital network are effectively clocked or synchronized by a single, well defined set of related frequencies.

In practice, this involves the planning, designing and operation of each network and sub-network to have all their systems/subsystems clocked at the same average rates and with an accuracy that is traceable to Universal Time Coordinate.

 

Current software applications and networks demand timing requirements that are not met with conventional computer clock systems. Many new products and protocols are being developed to meet timing needs. The cost effective method of meeting these demands is to make all interconnected networks operate as one synchronous network, by limiting sub-networks from operating at the same nominal frequency and within a well-defined tolerance.

The Network Timing Protocol can synchronize the system clocks of primary (Stratum 1) servers to Coordinated Universal Time (UTC) by way of radio, satellite (GPS), modem, or local atomic clocks. Introducing

GPS has facilitated a cost-effective means for establishing a Stratum 1 timing source/server in virtually any location. Before the advent of the Global Positioning System, it was financially impractical for most users to operate their own Stratum One servers.

 

Web Links:

 

http://www.zyfer.com/products/pr_ntpsn.html

http://www.ccci.com/product/network_mon/tnm41/wan.html

http://www.trimble.com/oem/om_timng.htm

http://www.eecis.udel.edu/~ntp/

http://www.eecis.udel.edu/~mills/ntp/clock1.htm

http://www.eecis.udel.edu/~mills/lab.htm

http://www.boulder.nist.gov/timefreq/service/its.htm