![]() Another stack including GPS and WWVB receivers and a cesium beam frequency standard is used at the Backroom. ![]() It includes dual-redundant primary and secondary GPS receivers, dual-redundant primary and secondary WWVB receivers, a primary cesium beam frequency standard and a secondary quartz frequency standard. The stack on the left shows our Master Time Facility (MTF). DCnet is directly connected to the EECIS department network and the CAIRN research network. The various subnets are dedicated to network research functions that can be isolated when necessary for testing. It is probably best known as the home base for the Network Time Protocol (NTP) and a flock of time servers that wind their springs on this network. DCnet has a rich history in the development of Internet technology and has been the witches brew from which many present day protocols have boiled over. There are several other computer controlled devices to pique students interests.Īn integral component of the laboratory is the DCnet research network, including the Backroom test facility. The mixer is not computer-controlled yet. The view at left is out an office window with a computer-controlled camera.Ī computer-controlled shortwave radio provides entertainment, as well as a reliable source of audio for remote testing. The personal workstations are equipped with cameras and microphones to support videoconferencing and related multimedia applications. Technical staff members and students usually use one workstation for personal mail/web browsing and another for experimental operating system and network software development. The Unix workstations are used for general purpose program development and experiments. The laboratory is generously populated with laser printers, big monitors and high resolution scanners. These machines and four routers are interconnected by a 10/100-Mb Ethernet. Three Unix file/time/web servers with UPS backup support over a dozen Unix workstations and PCs in 102 and 121 Evans. It includes workstations and laboratory equipment in a configuration specially designed for precision time and frequency measurements with a total of 9.6 GB of RAM and 1900 GB of disk resources. The Internetworking Research Laboratory (IRL) is in 121 Evans Hall, geographic coordinates 39:40:48.425N, 75:45:02.392W. DCnet Research Network PostScript | PowerPoint | PDF General Description.CAIRN/DARTnet Collaboration PostScript | PowerPoint | PDF.
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