NTP4 Software
Copyright (c) David L. Mills 1992-2005
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appears in all copies and that both the copyright notice and this permission notice appear in supporting documentation, and that the name University of Delaware not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. The University of Delaware makes no representations about the suitability this software for any purpose. It is provided "as is" without express or implied warranty.
NTP4 (Previously known as XNTP4) is a client program that will synchronize a Unix based computer. Installation of the program is a modification of the Operating System and can be complicated, so it does require extensive knowledge of the Unix Operating System. The program was written by Professor David Mills of the University of Delaware.
Note: Due to the extensive knowledge of Unix required to build and install the client software, the information presented here is provided only as a guide. We recommend referring to and being familiar with the website distribution information before attempting to install or use the NTP4 client software. Installation by a Unix Network administrator is STRONGLY ADVISED! Technical Support on this client software is not available from Spectracom Tech Support. Refer to NTP Resources for more details.
The NTP4 program requires one of two different types of time stamp inputs to allow external time synchronization. The first time type is an RS-232 ASCII data stream (either sent out in the interrogation mode from an available serial port on the Time Server or Master Clock or in a once-per-second data stream). The other allowable time stamp input is through a TCP/IP network connection to a Time Server. Spectracom NetClock® time servers / master clocks are available with or without a built-in Ethernet connector and TCP/IP support. If you have a Spectracom Master Clock without a Ethernet connector, you can simply use a Ethernet Time Server, such as the model 9188 that synchronizes to the remote RS-485 output of any NetClock Master Clock.